Re: [Tarantool-patches] [PATCH v1] Support to run tests with Python 3

[Leonid Vasiliev <lvasiliev@tarantool.org>]

Hi! Thank you for the patch.
See some comments bellow:

1) According to 
https://github.com/tarantool/tarantool/wiki/Code-review-procedure#commit-message
the title of commit message might look like:"tests:..."

2) According to PEP8, mixing using double quotes and quotes in a project
looks inconsistent (one must be selected). I understand that this is not
the purpose of your patch, but it can be cleaned up as well.

3) In addition to the previous one, I suggest choosing one of the
"format" or "%".

On 21.11.2020 12:44, sergeyb@tarantool.org wrote:
> From: Sergey Bronnikov <sergeyb@tarantool.org>
> 
> In a Python 3 'print' becomes a function, see [1]. Patch makes 'print'
> in a regression tests written in Python compatible with Python 3.
> 
> 1. https://docs.python.org/3/whatsnew/3.0.html#print-is-a-function
> 
> Closes #5538
> ---

4) Add link to branch.

> Gitlab CI: https://gitlab.com/tarantool/tarantool/-/pipelines/219268877
> GH issue: https://github.com/tarantool/tarantool/issues/5538
> 
>   test/box-py/bad_trigger.test.py          |  14 +--
>   test/box-py/call.test.py                 |  20 +--
>   test/box-py/iproto.test.py               | 148 ++++++++++++-----------
>   test/box-py/snapshot.test.py             |  16 +--
>   test/replication-py/cluster.test.py      | 113 ++++++++---------
>   test/replication-py/conflict.test.py     |   8 +-
>   test/replication-py/init_storage.test.py |  26 ++--
>   test/replication-py/multi.test.py        |  66 +++++-----
>   test/replication-py/swap.test.py         |  20 +--
>   test/xlog-py/dup_key.test.py             |  12 +-
>   test/xlog-py/empty.test.py               |   2 +-
>   test/xlog-py/lsn_gap.test.py             |   8 +-
>   test/xlog-py/misc.test.py                |  24 ++--
>   test/xlog-py/missing.test.py             |   8 +-
>   14 files changed, 245 insertions(+), 240 deletions(-)
> 
> diff --git a/test/box-py/bad_trigger.test.py b/test/box-py/bad_trigger.test.py
> index 7d200b921..d85b9055f 100644
> --- a/test/box-py/bad_trigger.test.py
> +++ b/test/box-py/bad_trigger.test.py
> @@ -6,11 +6,11 @@ from tarantool.const import IPROTO_GREETING_SIZE, IPROTO_CODE, IPROTO_ERROR, \
>   import socket
>   import msgpack
>   
> -print """
> +print("""
>    #
>    # if on_connect() trigger raises an exception, the connection is dropped
>    #
> - """
> + """)
>   
>   # silence possible error of strict mode
>   server.admin("nosuchfunction = nil")
> @@ -24,12 +24,12 @@ conn.connect()
>   s = conn.socket
>   
>   # Read greeting
> -print 'greeting: ', len(s.recv(IPROTO_GREETING_SIZE)) == IPROTO_GREETING_SIZE
> +print('greeting:  {}'.format(len(s.recv(IPROTO_GREETING_SIZE)) == IPROTO_GREETING_SIZE))
>   
>   # Read error packet
>   IPROTO_FIXHEADER_SIZE = 5
>   fixheader = s.recv(IPROTO_FIXHEADER_SIZE)
> -print 'fixheader: ', len(fixheader) == IPROTO_FIXHEADER_SIZE
> +print('fixheader:  {}'.format(len(fixheader) == IPROTO_FIXHEADER_SIZE))
>   unpacker.feed(fixheader)
>   packet_len = unpacker.unpack()
>   packet = s.recv(packet_len)
> @@ -38,9 +38,9 @@ unpacker.feed(packet)
>   # Parse packet
>   header = unpacker.unpack()
>   body = unpacker.unpack()
> -print 'error code', (header[IPROTO_CODE] & (REQUEST_TYPE_ERROR - 1))
> -print 'error message: ', body[IPROTO_ERROR]
> -print 'eof:', len(s.recv(1024)) == 0
> +print('error code {}'.format((header[IPROTO_CODE] & (REQUEST_TYPE_ERROR - 1))))
> +print('error message:  {}'.format(body[IPROTO_ERROR]))
> +print('eof: {}'.format(len(s.recv(1024)) == 0))
>   s.close()
>   
>   server.admin("box.session.on_connect(nil, f1)")
> diff --git a/test/box-py/call.test.py b/test/box-py/call.test.py
> index 974ba0cac..133c3fcfd 100644
> --- a/test/box-py/call.test.py
> +++ b/test/box-py/call.test.py
> @@ -21,11 +21,11 @@ call("f1")
>   # IPROTO required!
>   call("box.error", 33333, 'Hey!')
>   
> -print """
> +print("""
>   # A test case for Bug#103491
>   # server CALL processing bug with name path longer than two
>   # https://bugs.launchpad.net/tarantool/+bug/1034912
> -"""
> +""")
>   admin("f = function() return 'OK' end")
>   admin("test = {}")
>   admin("test.f = f")
> @@ -35,11 +35,11 @@ call("f")
>   call("test.f")
>   call("test.test.f")
>   
> -print """
> +print("""
>   # Test for Bug #955226
>   # Lua Numbers are passed back wrongly as strings
>   #
> -"""
> +""")
>   admin("function foo() return 1, 2, '1', '2' end")
>   call("foo")
>   
> @@ -136,14 +136,14 @@ admin("index = space:create_index('primary', { type = 'tree' })")
>   
>   
>   def lua_eval(name, *args):
> -    print 'eval (%s)(%s)' % (name, ','.join([ str(arg) for arg in args]))
> -    print '---'
> -    print iproto.py_con.eval(name, args)
> +    print('eval (%s)(%s)' % (name, ','.join([ str(arg) for arg in args])))
> +    print('---')
> +    print(iproto.py_con.eval(name, args))
>   
>   def lua_call(name, *args):
> -    print 'call %s(%s)' % (name, ','.join([ str(arg) for arg in args]))
> -    print '---'
> -    print iproto.py_con.call(name, args)
> +    print('call %s(%s)' % (name, ','.join([ str(arg) for arg in args])))
> +    print('---')
> +    print(iproto.py_con.call(name, args))
>   
>   def test(expr, *args):
>       lua_eval('return ' + expr, *args)
> diff --git a/test/box-py/iproto.test.py b/test/box-py/iproto.test.py
> index cdd1a71c5..cc1db9a09 100644
> --- a/test/box-py/iproto.test.py
> +++ b/test/box-py/iproto.test.py
> @@ -1,3 +1,5 @@
> +from __future__ import print_function
> +
>   import os
>   import sys
>   import struct
> @@ -11,25 +13,25 @@ from lib.tarantool_connection import TarantoolConnection
>   
>   admin("box.schema.user.grant('guest', 'read,write,execute', 'universe')")
>   
> -print """
> +print("""
>   #
>   # iproto packages test
>   #
> -"""
> +""")
>   
>   # opeing new connection to tarantool/box
>   conn = TarantoolConnection(server.iproto.host, server.iproto.port)
>   conn.connect()
>   s = conn.socket
>   
> -print """
> +print("""
>   # Test bug #899343 (server assertion failure on incorrect packet)
> -"""
> -print "# send the package with invalid length"
> +""")
> +print("# send the package with invalid length")
>   invalid_request = struct.pack('<LLL', 1, 4294967290, 1)
> -print s.send(invalid_request)
> -print "# check that is server alive"
> -print iproto.py_con.ping() > 0
> +print(s.send(invalid_request))
> +print("# check that is server alive")
> +print(iproto.py_con.ping() > 0)
>   
>   # closing connection
>   s.close()
> @@ -50,7 +52,7 @@ def test(header, body):
>       # Connect and authenticate
>       c = Connection('localhost', server.iproto.port)
>       c.connect()
> -    print 'query', repr_dict(header), repr_dict(body)
> +    print('query', repr_dict(header), repr_dict(body))
>       header = msgpack.dumps(header)
>       body = msgpack.dumps(body)
>       query = msgpack.dumps(len(header) + len(body)) + header + body
> @@ -59,36 +61,36 @@ def test(header, body):
>       try:
>           s.send(query)
>       except OSError as e:
> -        print '   => ', 'Failed to send request'
> +        print('   => ', 'Failed to send request')
>       c.close()
> -    print iproto.py_con.ping() > 0
> +    print(iproto.py_con.ping() > 0)
>   
> -print """
> +print("""
>   #  Test gh-206 "Segfault if sending IPROTO package without `KEY` field"
> -"""
> +""")
>   
> -print "IPROTO_SELECT"
> +print("IPROTO_SELECT")
>   test({ IPROTO_CODE : REQUEST_TYPE_SELECT }, { IPROTO_SPACE_ID: 280 })
> -print "\n"
> +print("\n")
>   
> -print "IPROTO_DELETE"
> +print("IPROTO_DELETE")
>   test({ IPROTO_CODE : REQUEST_TYPE_DELETE }, { IPROTO_SPACE_ID: 280 })
> -print "\n"
> +print("\n")
>   
> -print "IPROTO_UPDATE"
> +print("IPROTO_UPDATE")
>   test({ IPROTO_CODE : REQUEST_TYPE_UPDATE }, { IPROTO_SPACE_ID: 280 })
>   test({ IPROTO_CODE : REQUEST_TYPE_UPDATE },
>        { IPROTO_SPACE_ID: 280, IPROTO_KEY: (1, )})
> -print "\n"
> +print("\n")
>   
> -print "IPROTO_REPLACE"
> +print("IPROTO_REPLACE")
>   test({ IPROTO_CODE : REQUEST_TYPE_REPLACE }, { IPROTO_SPACE_ID: 280 })
> -print "\n"
> +print("\n")
>   
> -print "IPROTO_CALL"
> +print("IPROTO_CALL")
>   test({ IPROTO_CODE : REQUEST_TYPE_CALL }, {})
>   test({ IPROTO_CODE : REQUEST_TYPE_CALL }, { IPROTO_KEY: ('procname', )})
> -print "\n"
> +print("\n")
>   
>   # gh-434 Tarantool crashes on multiple iproto requests with WAL enabled
>   admin("box.cfg.wal_mode")
> @@ -104,11 +106,11 @@ s = c._socket
>   try:
>       s.send(bytes(request1) + bytes(request2))
>   except OSError as e:
> -    print '   => ', 'Failed to send request'
> +    print('   => ', 'Failed to send request')
>   response1 = Response(c, c._read_response())
>   response2 = Response(c, c._read_response())
> -print response1.__str__()
> -print response2.__str__()
> +print(response1.__str__())
> +print(response2.__str__())
>   
>   request1 = RequestInsert(c, 567, [3, "occama"])
>   request2 = RequestSelect(c, 567, 0, [1], 0, 1, 0)
> @@ -116,11 +118,11 @@ s = c._socket
>   try:
>       s.send(bytes(request1) + bytes(request2))
>   except OSError as e:
> -    print '   => ', 'Failed to send request'
> +    print('   => ', 'Failed to send request')
>   response1 = Response(c, c._read_response())
>   response2 = Response(c, c._read_response())
> -print response1.__str__()
> -print response2.__str__()
> +print(response1.__str__())
> +print(response2.__str__())
>   
>   request1 = RequestSelect(c, 567, 0, [2], 0, 1, 0)
>   request2 = RequestInsert(c, 567, [4, "ockham"])
> @@ -128,11 +130,11 @@ s = c._socket
>   try:
>       s.send(bytes(request1) + bytes(request2))
>   except OSError as e:
> -    print '   => ', 'Failed to send request'
> +    print('   => ', 'Failed to send request')
>   response1 = Response(c, c._read_response())
>   response2 = Response(c, c._read_response())
> -print response1.__str__()
> -print response2.__str__()
> +print(response1.__str__())
> +print(response2.__str__())
>   
>   request1 = RequestSelect(c, 567, 0, [1], 0, 1, 0)
>   request2 = RequestSelect(c, 567, 0, [2], 0, 1, 0)
> @@ -140,11 +142,11 @@ s = c._socket
>   try:
>       s.send(bytes(request1) + bytes(request2))
>   except OSError as e:
> -    print '   => ', 'Failed to send request'
> +    print('   => ', 'Failed to send request')
>   response1 = Response(c, c._read_response())
>   response2 = Response(c, c._read_response())
> -print response1.__str__()
> -print response2.__str__()
> +print(response1.__str__())
> +print(response2.__str__())
>   
>   c.close()
>   
> @@ -192,27 +194,27 @@ TESTS = [
>   for test in TESTS:
>       it = iter(test)
>       size = next(it)
> -    print 'STR', size
> -    print '--'
> +    print('STR', size)
> +    print('--')
>       for fmt in it:
> -        print '0x' + fmt.encode('hex'), '=>',
> +        print('0x' + fmt.encode('hex'), '=>', end=" ")

5) What for the "end" is needed here? (and in the same changes below).

>           field = '*' * size
>           c._send_request(RawInsert(c, space_id, "\x91" + fmt + field))
>           tuple = space.select(field)[0]
> -        print len(tuple[0])== size and 'ok' or 'fail',
> +        print(len(tuple[0])== size and 'ok' or 'fail', end=" ")
>           it2 = iter(test)
>           next(it2)
>           for fmt2 in it2:
>               tuple = c._send_request(RawSelect(c, space_id,
>                   "\x91" + fmt2 + field))[0]
> -            print len(tuple[0]) == size and 'ok' or 'fail',
> +            print(len(tuple[0]) == size and 'ok' or 'fail', end=" ")
>           tuple = space.delete(field)[0]
> -        print len(tuple[0]) == size and 'ok' or 'fail',
> -        print
> -    print
> +        print(len(tuple[0]) == size and 'ok' or 'fail', end="")
> +        print()
> +    print()

6) What for this `print()` needed? (and in the same changes below).

>   
>   
> -print 'Test of schema_id in iproto.'
> +print('Test of schema_id in iproto.')
>   c = Connection('localhost', server.iproto.port)
>   c.connect()
>   s = c._socket
> @@ -235,7 +237,7 @@ def receive_response():
>           resp_header = unpacker.unpack()
>           resp_body = unpacker.unpack()
>       except OSError as e:
> -        print '   => ', 'Failed to recv response'
> +        print('   => ', 'Failed to recv response')
>       res = {}
>       res['header'] = resp_header
>       res['body'] = resp_body
> @@ -249,7 +251,7 @@ def test_request(req_header, req_body):
>       try:
>           s.send(query)
>       except OSError as e:
> -        print '   => ', 'Failed to send request'
> +        print('   => ', 'Failed to send request')
>       return receive_response()
>   
>   header = { IPROTO_CODE : REQUEST_TYPE_SELECT}
> @@ -260,31 +262,31 @@ body = { IPROTO_SPACE_ID: space_id,
>       IPROTO_OFFSET: 0,
>       IPROTO_LIMIT: 1 }
>   resp = test_request(header, body)
> -print 'Normal connect done w/o errors:', resp['header'][0] == 0
> -print 'Got schema_id:', resp['header'][5] > 0
> +print('Normal connect done w/o errors:', resp['header'][0] == 0)
> +print('Got schema_id:', resp['header'][5] > 0)
>   schema_id = resp['header'][5]
>   
>   header = { IPROTO_CODE : REQUEST_TYPE_SELECT, 5 : 0 }
>   resp = test_request(header, body)
> -print 'Zero-schema_id connect done w/o errors:', resp['header'][0] == 0
> -print 'Same schema_id:', resp['header'][5] == schema_id
> +print('Zero-schema_id connect done w/o errors:', resp['header'][0] == 0)
> +print('Same schema_id:', resp['header'][5] == schema_id)
>   
>   header = { IPROTO_CODE : REQUEST_TYPE_SELECT, 5 : schema_id }
>   resp = test_request(header, body)
> -print 'Normal connect done w/o errors:', resp['header'][0] == 0
> -print 'Same schema_id:', resp['header'][5] == schema_id
> +print('Normal connect done w/o errors:', resp['header'][0] == 0)
> +print('Same schema_id:', resp['header'][5] == schema_id)
>   
>   header = { IPROTO_CODE : REQUEST_TYPE_SELECT, 5 : schema_id + 1 }
>   resp = test_request(header, body)
> -print 'Wrong schema_id leads to error:', resp['header'][0] != 0
> -print 'Same schema_id:', resp['header'][5] == schema_id
> +print('Wrong schema_id leads to error:', resp['header'][0] != 0)
> +print('Same schema_id:', resp['header'][5] == schema_id)
>   
>   admin("space2 = box.schema.create_space('test2')")
>   
>   header = { IPROTO_CODE : REQUEST_TYPE_SELECT, 5 : schema_id }
>   resp = test_request(header, body)
> -print 'Schema changed -> error:', resp['header'][0] != 0
> -print 'Got another schema_id:', resp['header'][5] != schema_id
> +print('Schema changed -> error:', resp['header'][0] != 0)
> +print('Got another schema_id:', resp['header'][5] != schema_id)
>   
>   #
>   # gh-2334 Lost SYNC in JOIN response.
> @@ -298,14 +300,14 @@ if resp['header'][IPROTO_SYNC] == 2334:
>       while i < 3:
>           resp = receive_response()
>           if resp['header'][IPROTO_SYNC] != 2334:
> -            print 'Bad sync on response with number ', i
> +            print('Bad sync on response with number ', i)
>               break
>           if resp['header'][IPROTO_CODE] == REQUEST_TYPE_OK:
>               i += 1
>       else:
> -        print 'Sync ok'
> +        print('Sync ok')
>   else:
> -    print 'Bad first sync'
> +    print('Bad first sync')
>   
>   #
>   # Try incorrect JOIN. SYNC must be also returned.
> @@ -344,10 +346,10 @@ admin("box.schema.user.revoke('guest', 'read,write,execute', 'universe')")
>   # gh-272 if the packet was incorrect, respond with an error code
>   # gh-1654 do not close connnection on invalid request
>   #
> -print """
> +print("""
>   # Test bugs gh-272, gh-1654 if the packet was incorrect, respond with
>   # an error code and do not close connection
> -"""
> +""")
>   
>   c = Connection('localhost', server.iproto.port)
>   c.connect()
> @@ -355,15 +357,15 @@ s = c._socket
>   header = { "hello": "world"}
>   body = { "bug": 272 }
>   resp = test_request(header, body)
> -print 'sync=%d, %s' % (resp['header'][IPROTO_SYNC], resp['body'].get(IPROTO_ERROR))
> +print('sync=%d, %s' % (resp['header'][IPROTO_SYNC], resp['body'].get(IPROTO_ERROR)))
>   header = { IPROTO_CODE : REQUEST_TYPE_SELECT }
>   header[IPROTO_SYNC] = 1234
>   resp = test_request(header, body)
> -print 'sync=%d, %s' % (resp['header'][IPROTO_SYNC], resp['body'].get(IPROTO_ERROR))
> +print('sync=%d, %s' % (resp['header'][IPROTO_SYNC], resp['body'].get(IPROTO_ERROR)))
>   header[IPROTO_SYNC] = 5678
>   body = { IPROTO_SPACE_ID: 304, IPROTO_KEY: [], IPROTO_LIMIT: 1 }
>   resp = test_request(header, body)
> -print 'sync=%d, %s' % (resp['header'][IPROTO_SYNC], resp['body'].get(IPROTO_ERROR))
> +print('sync=%d, %s' % (resp['header'][IPROTO_SYNC], resp['body'].get(IPROTO_ERROR)))
>   c.close()
>   
>   
> @@ -379,32 +381,32 @@ request = RequestInsert(c, 568, [1, 0, 0, 0])
>   try:
>       s.send(bytes(request))
>   except OSError as e:
> -    print '   => ', 'Failed to send request'
> +    print('   => ', 'Failed to send request')
>   response = Response(c, c._read_response())
> -print response.__str__()
> +print(response.__str__())
>   
>   request = RequestUpdate(c, 568, 0, [1], [['+', 2, 1], ['-', 3, 1]])
>   try:
>       s.send(bytes(request))
>   except OSError as e:
> -    print '   => ', 'Failed to send request'
> +    print('   => ', 'Failed to send request')
>   response = Response(c, c._read_response())
> -print response.__str__()
> +print(response.__str__())
>   
>   request = RequestUpsert(c, 568, 0, [1, 0, 0, 0], [['+', 2, 1], ['-', 3, 1]])
>   try:
>       s.send(bytes(request))
>   except OSError as e:
> -    print '   => ', 'Failed to send request'
> +    print('   => ', 'Failed to send request')
>   response = Response(c, c._read_response())
>   
>   request = RequestSelect(c, 568, 0, [1], 0, 1, 0)
>   try:
>       s.send(bytes(request))
>   except OSError as e:
> -    print '   => ', 'Failed to send request'
> +    print('   => ', 'Failed to send request')
>   response = Response(c, c._read_response())
> -print response.__str__()
> +print(response.__str__())
>   
>   c.close()
>   
> @@ -421,8 +423,8 @@ s = c._socket
>   header = { IPROTO_CODE: REQUEST_TYPE_CALL, IPROTO_SYNC: 100 }
>   body = { IPROTO_FUNCTION_NAME: 'kek' }
>   resp = test_request(header, body)
> -print "Sync: ", resp['header'][IPROTO_SYNC]
> -print "Retcode: ", resp['body'][IPROTO_DATA]
> +print("Sync: ", resp['header'][IPROTO_SYNC])
> +print("Retcode: ", resp['body'][IPROTO_DATA])
>   
>   c.close()
>   
> diff --git a/test/box-py/snapshot.test.py b/test/box-py/snapshot.test.py
> index 2bfb8f621..dc5f3ee08 100644
> --- a/test/box-py/snapshot.test.py
> +++ b/test/box-py/snapshot.test.py
> @@ -9,13 +9,13 @@ sys.stdout.push_filter(server.vardir, "<dir>")
>   admin("space = box.schema.space.create('tweedledum')")
>   admin("index = space:create_index('primary', { type = 'hash' })")
>   
> -print """#
> +print("""#
>   # A test case for: http://bugs.launchpad.net/bugs/686411
>   # Check that 'box.snapshot()' does not overwrite a snapshot
>   # file that already exists. Verify also that any other
>   # error that happens when saving snapshot is propagated
>   # to the caller.
> -"""
> +""")
>   admin("space:insert{1, 'first tuple'}")
>   admin("box.snapshot()")
>   #
> @@ -38,14 +38,14 @@ os.rmdir(snapshot)
>   admin("space:delete{1}")
>   admin("space:delete{2}")
>   
> -print """#
> +print("""#
>   # A test case for http://bugs.launchpad.net/bugs/727174
>   # "tarantool_box crashes when saving snapshot on SIGUSR1"
> -#"""
> +#""")
>   
> -print """
> +print("""
>   # Increment the lsn number, to make sure there is no such snapshot yet
> -#"""
> +#""")
>   
>   admin("space:insert{1, 'Test tuple'}")
>   
> @@ -65,9 +65,9 @@ while not os.access(snapshot, os.F_OK) and iteration < MAX_ITERATIONS:
>     iteration = iteration + 1
>   
>   if iteration == 0 or iteration >= MAX_ITERATIONS:
> -  print "Snapshot is missing."
> +  print("Snapshot is missing.")
>   else:
> -  print "Snapshot exists."
> +  print("Snapshot exists.")
>   
>   admin("space:drop()")
>   
> diff --git a/test/replication-py/cluster.test.py b/test/replication-py/cluster.test.py
> index 088ca9c34..6a83611d7 100644
> --- a/test/replication-py/cluster.test.py
> +++ b/test/replication-py/cluster.test.py
> @@ -12,14 +12,14 @@ try:
>       cluster_uuid = yaml.safe_load(server.admin("box.space._schema:get('cluster')",
>           silent = True))[0][1]
>       uuid.UUID('{' + cluster_uuid + '}')
> -    print 'ok - cluster uuid'
> +    print('ok - cluster uuid')
>   except Exception as e:
> -    print 'not ok - invalid cluster uuid', e
> +    print('not ok - invalid cluster uuid', e)

7) If I understand correctly, this will not look as previously in 
python2. (Possibly, the `from __future__ import print_function` is needed.)

>   
>   server.iproto.reconnect() # re-connect with new permissions
> -print '-------------------------------------------------------------'
> -print ' gh-696: Check global READ permissions for replication'
> -print '-------------------------------------------------------------'
> +print('-------------------------------------------------------------')
> +print(' gh-696: Check global READ permissions for replication')
> +print('-------------------------------------------------------------')
>   
>   
>   # Generate replica cluster UUID
> @@ -27,23 +27,26 @@ replica_uuid = str(uuid.uuid4())
>   
>   ## Universal read permission is required to perform JOIN/SUBSCRIBE
>   rows = list(server.iproto.py_con.join(replica_uuid))
> -print len(rows) == 1 and rows[0].return_message.find('Read access') >= 0 and \
> -    'ok' or 'not ok', '-', 'join without read permissions on universe'
> +status = len(rows) == 1 and rows[0].return_message.find('Read access') >= 0 and \
> +        'ok' or 'not ok'
> +print('{} - join without read permissions on universe'.format(status))
>   rows = list(server.iproto.py_con.subscribe(cluster_uuid, replica_uuid))
> -print len(rows) == 1 and rows[0].return_message.find('Read access') >= 0 and \
> -    'ok' or 'not ok', '-', 'subscribe without read permissions on universe'
> +status = len(rows) == 1 and rows[0].return_message.find('Read access') >= 0 and \
> +        'ok' or 'not ok'
> +print('{} - subscribe without read permissions on universe'.format(status))
>   ## Write permission to space `_cluster` is required to perform JOIN
>   server.admin("box.schema.user.grant('guest', 'read', 'universe')")
>   server.iproto.reconnect() # re-connect with new permissions
>   rows = list(server.iproto.py_con.join(replica_uuid))
> -print len(rows) == 1 and rows[0].return_message.find('Write access') >= 0 and \
> -    'ok' or 'not ok', '-', 'join without write permissions to _cluster'
> +status = len(rows) == 1 and rows[0].return_message.find('Write access') >= 0 and \
> +        'ok' or 'not ok'
> +print('{} - join without write permissions to _cluster'.format(status))
>   
>   def check_join(msg):
>       ok = True
>       for resp in server.iproto.py_con.join(replica_uuid):
>           if resp._return_code != 0:
> -            print 'not ok', '-', msg, resp.return_message
> +            print('not ok - {} {}'.format(msg, resp.return_message))
>               ok = False
>   
>       server.iproto.reconnect() # the only way to stop JOIN
> @@ -51,10 +54,10 @@ def check_join(msg):
>           return
>       tuples = server.iproto.py_con.space('_cluster').select(replica_uuid, index = 1)
>       if len(tuples) == 0:
> -        print 'not ok', '-', msg, 'missing entry in _cluster'
> +        print('not ok - {} missing entry in _cluster'.format(msg))
>           return
>       server_id = tuples[0][0]
> -    print 'ok', '-', msg
> +    print('ok - {}'.format(msg))
>       return server_id
>   
>   ## JOIN with permissions
> @@ -71,9 +74,9 @@ server.iproto.reconnect() # re-connect with new permissions
>   server_id = check_join('join with granted role')
>   server.iproto.py_con.space('_cluster').delete(server_id)
>   
> -print '-------------------------------------------------------------'
> -print 'gh-434: Assertion if replace _cluster tuple for local server'
> -print '-------------------------------------------------------------'
> +print('-------------------------------------------------------------')
> +print('gh-434: Assertion if replace _cluster tuple for local server')
> +print('-------------------------------------------------------------')
>   
>   master_uuid = server.get_param('uuid')
>   sys.stdout.push_filter(master_uuid, '<master uuid>')
> @@ -87,9 +90,9 @@ server.admin("box.space._cluster:replace{1, require('uuid').str()}")
>   # Update of tail is OK
>   server.admin("box.space._cluster:update(1, {{'=', 3, 'test'}})")
>   
> -print '-------------------------------------------------------------'
> -print 'gh-1140: Assertion if replace _cluster tuple for remote server'
> -print '-------------------------------------------------------------'
> +print('-------------------------------------------------------------')
> +print('gh-1140: Assertion if replace _cluster tuple for remote server')
> +print('-------------------------------------------------------------')
>   
>   # Test that insert is OK
>   new_uuid = '0d5bd431-7f3e-4695-a5c2-82de0a9cbc95'
> @@ -112,9 +115,9 @@ server.admin("box.info.vclock[5] == nil")
>   server.stop()
>   server.deploy()
>   
> -print '-------------------------------------------------------------'
> -print 'Start a new replica and check box.info on the start'
> -print '-------------------------------------------------------------'
> +print('-------------------------------------------------------------')
> +print('Start a new replica and check box.info on the start')
> +print('-------------------------------------------------------------')
>   # master server
>   master = server
>   master_id = master.get_param('id')
> @@ -135,45 +138,45 @@ replica.admin('not box.info.ro')
>   replica.admin('box.info.lsn == 0')
>   replica.admin('box.info.vclock[%d] == nil' % replica_id)
>   
> -print '-------------------------------------------------------------'
> -print 'Modify data to bump LSN and check box.info'
> -print '-------------------------------------------------------------'
> +print('-------------------------------------------------------------')
> +print('Modify data to bump LSN and check box.info')
> +print('-------------------------------------------------------------')
>   replica.admin('box.space._schema:insert{"test", 48}')
>   replica.admin('box.info.lsn == 1')
>   replica.admin('box.info.vclock[%d] == 1' % replica_id)
>   
> -print '-------------------------------------------------------------'
> -print 'Connect master to replica'
> -print '-------------------------------------------------------------'
> +print('-------------------------------------------------------------')
> +print('Connect master to replica')
> +print('-------------------------------------------------------------')
>   replication_source = yaml.safe_load(replica.admin('box.cfg.listen', silent = True))[0]
>   sys.stdout.push_filter(replication_source, '<replication_source>')
>   master.admin("box.cfg{ replication_source = '%s' }" % replication_source)
>   master.wait_lsn(replica_id, replica.get_lsn(replica_id))
>   
> -print '-------------------------------------------------------------'
> -print 'Disconnect replica from master'
> -print '-------------------------------------------------------------'
> +print('-------------------------------------------------------------')
> +print('Disconnect replica from master')
> +print('-------------------------------------------------------------')
>   replica.admin('box.cfg { replication_source = "" }')
>   
> -print '-------------------------------------------------------------'
> -print 'Unregister replica'
> -print '-------------------------------------------------------------'
> +print('-------------------------------------------------------------')
> +print('Unregister replica')
> +print('-------------------------------------------------------------')
>   
>   master.admin('box.space._cluster:delete{%d} ~= nil' % replica_id)
>   
>   # gh-1219: LSN must not be removed from vclock on unregister
>   master.admin('box.info.vclock[%d] == 1' % replica_id)
>   
> -print '-------------------------------------------------------------'
> -print 'Modify data to bump LSN on replica'
> -print '-------------------------------------------------------------'
> +print('-------------------------------------------------------------')
> +print('Modify data to bump LSN on replica')
> +print('-------------------------------------------------------------')
>   replica.admin('box.space._schema:insert{"tost", 49}')
>   replica.admin('box.info.lsn == 2')
>   replica.admin('box.info.vclock[%d] == 2' % replica_id)
>   
> -print '-------------------------------------------------------------'
> -print 'Master must not crash then receives orphan rows from replica'
> -print '-------------------------------------------------------------'
> +print('-------------------------------------------------------------')
> +print('Master must not crash then receives orphan rows from replica')
> +print('-------------------------------------------------------------')
>   
>   replication_source = yaml.safe_load(replica.admin('box.cfg.listen', silent = True))[0]
>   sys.stdout.push_filter(replication_source, '<replication>')
> @@ -186,9 +189,9 @@ master.admin("box.cfg{ replication = '' }")
>   replica.stop()
>   replica.cleanup()
>   
> -print '-------------------------------------------------------------'
> -print 'Start a new replica and check that server_id, LSN is re-used'
> -print '-------------------------------------------------------------'
> +print('-------------------------------------------------------------')
> +print('Start a new replica and check that server_id, LSN is re-used')
> +print('-------------------------------------------------------------')
>   
>   #
>   # gh-1219: Proper removal of servers with non-zero LSN from _cluster
> @@ -216,9 +219,9 @@ replica.stop()
>   replica.cleanup()
>   master.admin('box.space._cluster:delete{%d} ~= nil' % replica_id)
>   
> -print '-------------------------------------------------------------'
> -print 'JOIN replica to read-only master'
> -print '-------------------------------------------------------------'
> +print('-------------------------------------------------------------')
> +print('JOIN replica to read-only master')
> +print('-------------------------------------------------------------')
>   
>   # master server
>   master = server
> @@ -235,13 +238,13 @@ try:
>   except Exception as e:
>       line = "ER_READONLY"
>       if failed.logfile_pos.seek_once(line) >= 0:
> -        print "'%s' exists in server log" % line
> +        print("'%s' exists in server log" % line)
>   
>   master.admin('box.cfg { read_only = false }')
>   
> -print '-------------------------------------------------------------'
> -print 'JOIN replica with different replica set UUID'
> -print '-------------------------------------------------------------'
> +print('-------------------------------------------------------------')
> +print('JOIN replica with different replica set UUID')
> +print('-------------------------------------------------------------')
>   
>   failed = TarantoolServer(server.ini)
>   failed.script = 'replication-py/uuid_mismatch.lua'
> @@ -254,13 +257,13 @@ try:
>   except Exception as e:
>       line = "ER_REPLICASET_UUID_MISMATCH"
>       if failed.logfile_pos.seek_once(line) >= 0:
> -        print "'%s' exists in server log" % line
> +        print("'%s' exists in server log" % line)
>   
>   failed.cleanup()
>   
> -print '-------------------------------------------------------------'
> -print 'Cleanup'
> -print '-------------------------------------------------------------'
> +print('-------------------------------------------------------------')
> +print('Cleanup')
> +print('-------------------------------------------------------------')
>   
>   # Cleanup
>   sys.stdout.pop_filter()
> diff --git a/test/replication-py/conflict.test.py b/test/replication-py/conflict.test.py
> index 1dcd66765..70afdeda4 100644
> --- a/test/replication-py/conflict.test.py
> +++ b/test/replication-py/conflict.test.py
> @@ -16,8 +16,8 @@ replica.rpl_master = master
>   replica.deploy()
>   
>   def parallel_run(cmd1, cmd2, compare):
> -    print 'parallel send: %s' % cmd1
> -    print 'parallel send: %s' % cmd2
> +    print('parallel send: %s' % cmd1)
> +    print('parallel send: %s' % cmd2)
>       master.admin.socket.sendall('%s\n' % cmd1)
>       replica.admin.socket.sendall('%s\n' % cmd2)
>   
> @@ -37,11 +37,11 @@ def parallel_run(cmd1, cmd2, compare):
>       while True:
>           sleep(0.01)
>           if any(results):
> -            print 'replication state is correct'
> +            print('replication state is correct')
>               break
>   
>   def prepare_cluster():
> -    print 'reset master-master replication'
> +    print('reset master-master replication')
>       master.stop()
>       master.cleanup()
>       master.start()
> diff --git a/test/replication-py/init_storage.test.py b/test/replication-py/init_storage.test.py
> index 4be531f8d..c65fca27b 100644
> --- a/test/replication-py/init_storage.test.py
> +++ b/test/replication-py/init_storage.test.py
> @@ -7,9 +7,9 @@ master = server
>   master_id = master.get_param('id')
>   master.admin("box.schema.user.grant('guest', 'replication')")
>   
> -print '-------------------------------------------------------------'
> -print 'gh-484: JOIN doesn\'t save data to snapshot with TREE index'
> -print '-------------------------------------------------------------'
> +print('-------------------------------------------------------------')
> +print('gh-484: JOIN doesn\'t save data to snapshot with TREE index')
> +print('-------------------------------------------------------------')
>   
>   master.admin("space = box.schema.space.create('test', {id =  42})")
>   master.admin("index = space:create_index('primary', { type = 'tree'})")
> @@ -28,9 +28,9 @@ replica.admin('box.space.test:select()')
>   replica.stop()
>   replica.cleanup()
>   
> -print '-------------------------------------------------------------'
> -print 'replica test 2 (must be ok)'
> -print '-------------------------------------------------------------'
> +print('-------------------------------------------------------------')
> +print('replica test 2 (must be ok)')
> +print('-------------------------------------------------------------')
>   
>   master.restart()
>   master.admin('for k = 10, 19 do box.space[42]:insert{k, k*k*k} end')
> @@ -51,9 +51,9 @@ for i in range(1, 20):
>   replica.stop()
>   replica.cleanup()
>   
> -print '-------------------------------------------------------------'
> -print 'reconnect on JOIN/SUBSCRIBE'
> -print '-------------------------------------------------------------'
> +print('-------------------------------------------------------------')
> +print('reconnect on JOIN/SUBSCRIBE')
> +print('-------------------------------------------------------------')
>   
>   server.stop()
>   replica = TarantoolServer(server.ini)
> @@ -62,19 +62,19 @@ replica.vardir = server.vardir #os.path.join(server.vardir, 'replica')
>   replica.rpl_master = master
>   replica.deploy(wait=False)
>   
> -print 'waiting reconnect on JOIN...'
> +print('waiting reconnect on JOIN...')
>   server.start()
>   replica.wait_until_started()
> -print 'ok'
> +print('ok')
>   
>   replica.stop()
>   server.stop()
>   
> -print 'waiting reconnect on SUBSCRIBE...'
> +print('waiting reconnect on SUBSCRIBE...')
>   replica.start(wait=False)
>   server.start()
>   replica.wait_until_started()
> -print 'ok'
> +print('ok')
>   
>   replica.stop()
>   replica.cleanup()
> diff --git a/test/replication-py/multi.test.py b/test/replication-py/multi.test.py
> index 233802458..21495fa2e 100644
> --- a/test/replication-py/multi.test.py
> +++ b/test/replication-py/multi.test.py
> @@ -14,9 +14,9 @@ master.admin("fiber = require('fiber')")
>   master.admin("box.schema.user.grant('guest', 'replication')")
>   master.admin("box.schema.user.grant('guest', 'execute', 'universe')")
>   
> -print '----------------------------------------------------------------------'
> -print 'Bootstrap replicas'
> -print '----------------------------------------------------------------------'
> +print('----------------------------------------------------------------------')
> +print('Bootstrap replicas')
> +print('----------------------------------------------------------------------')
>   
>   # Start replicas
>   master.id = master.get_param('id')
> @@ -31,17 +31,17 @@ for i in range(REPLICA_N - 1):
>       # Otherwise can get ACCESS_DENIED error.
>       cluster.append(server)
>   
> -# Make a list of servers
> +# Makie a list of servers

8) I don't understand the change.

>   sources = []
>   for server in cluster:
>       sources.append(yaml.safe_load(server.admin('box.cfg.listen', silent = True))[0])
>       server.id = server.get_param('id')
>   
> -print 'done'
> +print('done')
>   
> -print '----------------------------------------------------------------------'
> -print 'Make a full mesh'
> -print '----------------------------------------------------------------------'
> +print('----------------------------------------------------------------------')
> +print('Make a full mesh')
> +print('----------------------------------------------------------------------')
>   
>   # Connect each server to each other to make full mesh
>   for server in cluster:
> @@ -54,55 +54,55 @@ for server in cluster:
>               while #box.info.vclock[...] ~= nil do
>                   fiber.sleep(0.01)
>               end;""", server2.id)
> -        print 'server', server.id, "connected"
> +        print('server {} connected'.format(server.id))
>   
> -print 'done'
> +print('done')
>   
> -print '----------------------------------------------------------------------'
> -print 'Test inserts'
> -print '----------------------------------------------------------------------'
> +print('----------------------------------------------------------------------')
> +print('Test inserts')
> +print('----------------------------------------------------------------------')
>   
> -print 'Create a test space'
> +print('Create a test space')
>   master.admin("_ = box.schema.space.create('test')")
>   master.admin("_ = box.space.test:create_index('primary')")
>   master_lsn = master.get_lsn(master.id)
>   # Wait changes to propagate to replicas
>   for server in cluster:
>       server.wait_lsn(master.id, master_lsn)
> -    print 'server', server.id, 'is ok'
> -print
> +    print('server {} is ok'.format(server.id))
> +print('') >
> -print 'Insert records'
> +print('Insert records')
>   for i in range(ROW_N):
>       server = cluster[i % REPLICA_N]
>       server.admin("box.space.test:insert{%d, %s}" % (i, server.id), silent = True)
> -print 'inserted %d records' % ROW_N
> -print
> +print('inserted {} records'.format(ROW_N))
> +print('')
>   
> -print 'Synchronize'
> +print('Synchronize')
>   for server1 in cluster:
>       for server2 in cluster:
>           server1.wait_lsn(server2.id, server2.get_lsn(server2.id))
> -    print 'server', server1.id, 'done'
> -print 'done'
> -print
> +    print('server {} done'.format(server1.id))
> +print('done')
> +print('')
>   
> -print 'Check data'
> +print('Check data')
>   for server in cluster:
>       cnt = yaml.safe_load(server.admin("box.space.test:len()", silent = True))[0]
> -    print 'server', server.id, 'is', cnt == ROW_N and 'ok' or 'not ok'
> -print 'Done'
> -print
> +    print('server {} is {}'.format(server.id, cnt == ROW_N and 'ok' or 'not ok'))
> +print('Done')
> +print('')
>   
> -print
> -print '----------------------------------------------------------------------'
> -print 'Cleanup'
> -print '----------------------------------------------------------------------'
> +print('')
> +print('----------------------------------------------------------------------')
> +print('Cleanup')
> +print('----------------------------------------------------------------------')
>   
>   for server in cluster:
>       server.stop()
> -    print 'server', server.id, 'done'
> -print
> +    print('server {} done'.format(server.id))
> +print('')
>   
>   master.cleanup()
>   master.deploy()
> diff --git a/test/replication-py/swap.test.py b/test/replication-py/swap.test.py
> index 98eeeea6d..a96b5a117 100644
> --- a/test/replication-py/swap.test.py
> +++ b/test/replication-py/swap.test.py
> @@ -15,18 +15,18 @@ engines = ['memtx', 'vinyl']
>   def insert_tuples(_server, begin, end, msg = "tuple"):
>       for engine in engines:
>           for i in range(begin, end):
> -            print 'box.space.%s:insert{%d, "%s %d"}' % (engine, i, msg, i)
> -            print '-'
> +            print('box.space.%s:insert{%d, "%s %d"}' % (engine, i, msg, i))
> +            print('-')
>               space = _server.iproto.py_con.space(engine)
> -            print space.insert((i, '%s %d' % (msg, i)))
> +            print(space.insert((i, '%s %d' % (msg, i))))
>   
>   def select_tuples(_server, begin, end):
>       for engine in engines:
>           for i in range(begin, end):
> -            print 'box.space.%s:select{%d}' % (engine, i)
> -            print '-'
> +            print('box.space.%s:select{%d}' % (engine, i))
> +            print('-')
>               space = _server.iproto.py_con.space(engine)
> -            print space.select(i)
> +            print(space.select(i))
>   
>   # master server
>   master = server
> @@ -59,14 +59,14 @@ for engine in engines:
>   #host_port = "%s:%s" % master.iproto.uri
>   #m = re.search(r'replica/(.*)/.*', status)
>   #if not m or m.group(1) != host_port:
> -#    print 'invalid box.info.status', status, 'expected host:port', host_port
> +#    print('invalid box.info.status', status, 'expected host:port', host_port)

9) Maybe just delete this dead code?

>   
>   master_id = master.get_param('id')
>   replica_id = replica.get_param('id')
>   
>   id = ID_BEGIN
>   for i in range(REPEAT):
> -    print "test %d iteration" % i
> +    print("test %d iteration" % i)
>   
>       # insert to master
>       insert_tuples(master, id, id + ID_STEP)
> @@ -82,7 +82,7 @@ for i in range(REPEAT):
>       select_tuples(replica, id, id + ID_STEP)
>       id += ID_STEP
>   
> -    print "swap servers"
> +    print("swap servers")
>       # reconfigure replica to master
>       replica.rpl_master = None
>       print("switch replica to master")
> @@ -106,7 +106,7 @@ for i in range(REPEAT):
>       select_tuples(master, id, id + ID_STEP)
>       id += ID_STEP
>   
> -    print "rollback servers configuration"
> +    print("rollback servers configuration")
>       # reconfigure replica to master
>       master.rpl_master = None
>       print("switch master to master")
> diff --git a/test/xlog-py/dup_key.test.py b/test/xlog-py/dup_key.test.py
> index 7609c9555..0b11c863d 100644
> --- a/test/xlog-py/dup_key.test.py
> +++ b/test/xlog-py/dup_key.test.py
> @@ -26,7 +26,7 @@ server.stop()
>   
>   # Save wal#1
>   if os.access(wal, os.F_OK):
> -    print ".xlog exists"
> +    print(".xlog exists")
>       os.rename(wal, wal_old)
>   
>   # Write wal#2
> @@ -37,16 +37,16 @@ server.stop()
>   
>   # Restore wal#1
>   if not os.access(wal, os.F_OK):
> -    print ".xlog does not exist"
> +    print(".xlog does not exist")
>       os.rename(wal_old, wal)
>   
>   server.start()
>   line = 'Duplicate key'
> -print "check log line for '%s'" % line
> -print
> +print("check log line for '%s'" % line)
> +print('')
>   if server.logfile_pos.seek_once(line) >= 0:
> -    print "'%s' exists in server log" % line
> -print
> +    print("'%s' exists in server log" % line)
> +print('')
>   
>   server.admin("box.space.test:get{1}")
>   server.admin("box.space.test:get{2}")
> diff --git a/test/xlog-py/empty.test.py b/test/xlog-py/empty.test.py
> index d6f89e0fb..f284e2046 100644
> --- a/test/xlog-py/empty.test.py
> +++ b/test/xlog-py/empty.test.py
> @@ -20,7 +20,7 @@ f.close()
>   server.start()
>   server.stop()
>   if os.access(filename, os.F_OK):
> -    print ".xlog exists"
> +    print(".xlog exists")
>   # the server has started but is crippled since it
>   # can't override an existing file
>   server.start()
> diff --git a/test/xlog-py/lsn_gap.test.py b/test/xlog-py/lsn_gap.test.py
> index 7a503ff07..d16198756 100644
> --- a/test/xlog-py/lsn_gap.test.py
> +++ b/test/xlog-py/lsn_gap.test.py
> @@ -28,11 +28,11 @@ os.unlink(wal)
>   
>   server.start()
>   line="ignoring a gap in LSN"
> -print "check log line for '%s'" % line
> -print
> +print("check log line for '%s'" % line)
> +print('')
>   if server.logfile_pos.seek_once(line) >= 0:
> -    print "'%s' exists in server log" % line
> -print
> +    print("'%s' exists in server log" % line)
> +print('')
>   
>   # missing tuple from removed xlog
>   server.admin("box.space.test:select{}")
> diff --git a/test/xlog-py/misc.test.py b/test/xlog-py/misc.test.py
> index e39ae1495..8dd2e2516 100644
> --- a/test/xlog-py/misc.test.py
> +++ b/test/xlog-py/misc.test.py
> @@ -11,9 +11,9 @@ server.stop()
>   
>   data_path = os.path.join(server.vardir, server.name)
>   
> -print """
> +print("""
>   # xlog file must exist after inserts.
> -"""
> +""")
>   filename = str(lsn).zfill(20) + ".xlog"
>   wal = os.path.join(data_path, filename)
>   
> @@ -21,16 +21,16 @@ server.start()
>   
>   server.admin("space = box.schema.space.create('tweedledum')")
>   if os.access(wal, os.F_OK):
> -  print ".xlog exists"
> +  print(".xlog exists")
>   
>   server.admin("index = space:create_index('primary', { type = 'hash' })")
>   
>   server.stop()
>   lsn += 2
>   
> -print """
> +print("""
>   # a new xlog must be opened after regular termination.
> -"""
> +""")
>   filename = str(lsn).zfill(20) + ".xlog"
>   server.start()
>   
> @@ -39,17 +39,17 @@ wal = os.path.join(data_path, filename)
>   server.admin("box.space.tweedledum:insert{3, 'third tuple'}")
>   
>   if os.access(wal, os.F_OK):
> -  print "a new .xlog exists"
> +  print("a new .xlog exists")
>   
>   server.stop()
>   
>   if os.access(wal, os.F_OK):
> -  print ".xlog stays around after sutdown"
> +  print(".xlog stays around after sutdown")
>   lsn += 1
>   
> -print """
> +print("""
>   # An xlog file with one record during recovery.
> -"""
> +""")
>   
>   server.start()
>   filename = str(lsn).zfill(20) + ".xlog"
> @@ -63,7 +63,7 @@ if pid > 0:
>   server.stop()
>   
>   if os.access(wal, os.F_OK):
> -    print ".xlog exists after kill -9"
> +    print(".xlog exists after kill -9")
>       # Remove last byte from xlog
>       f = open(wal, "a")
>       size = f.tell()
> @@ -73,7 +73,7 @@ if os.access(wal, os.F_OK):
>   server.start()
>   
>   if os.access(wal, os.F_OK):
> -  print "corrupt .xlog exists after start"
> +  print("corrupt .xlog exists after start")
>   server.stop()
>   lsn += 1
>   
> @@ -98,4 +98,4 @@ for f in os.listdir(data_path):
>   server.start()
>   lsn = int(yaml.safe_load(admin("box.info.lsn", silent=True))[0])
>   if lsn == orig_lsn:
> -    print ".snap.inprogress is ignored"
> +    print(".snap.inprogress is ignored")
> diff --git a/test/xlog-py/missing.test.py b/test/xlog-py/missing.test.py
> index df35dc6d7..f30c331e5 100644
> --- a/test/xlog-py/missing.test.py
> +++ b/test/xlog-py/missing.test.py
> @@ -34,11 +34,11 @@ os.unlink(wal)
>   # this may lead to infinite recursion at start
>   server.start()
>   line="ignoring a gap in LSN"
> -print "check log line for '%s'" % line
> -print
> +print("check log line for '%s'" % line)
> +print('')
>   if server.logfile_pos.seek_once(line) >= 0:
> -    print "'%s' exists in server log" % line
> -print
> +    print("'%s' exists in server log" % line)
> +print('')
>   
>   # missing tuples from removed xlog
>   server.admin("box.space.test:select{}")
>