Package proton :: Module _compat

[frames] | no frames]

# Source Code for Module proton._compat

     1  #
     2  # Licensed to the Apache Software Foundation (ASF) under one
     3  # or more contributor license agreements.  See the NOTICE file
     4  # distributed with this work for additional information
     5  # regarding copyright ownership.  The ASF licenses this file
     6  # to you under the Apache License, Version 2.0 (the
     7  # "License"); you may not use this file except in compliance
     8  # with the License.  You may obtain a copy of the License at
     9  #
    10  #   http://www.apache.org/licenses/LICENSE-2.0
    11  #
    12  # Unless required by applicable law or agreed to in writing,
    13  # software distributed under the License is distributed on an
    14  # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
    15  # KIND, either express or implied.  See the License for the
    16  # specific language governing permissions and limitations
    17  # under the License.
    18  #
    19
    20  """
    21  Utilities to help Proton support both python2 and python3.
    22  """
    23
    24  import sys
    25  import types
    26  IS_PY2 = sys.version_info[0] == 2
    27  IS_PY3 = sys.version_info[0] == 3
    28
    29  if IS_PY3:
    30      INT_TYPES = (int,)
    31      TEXT_TYPES = (str,)
    32      STRING_TYPES = (str,)
    33      BINARY_TYPES = (bytes,)
    34      CLASS_TYPES = (type,)
    35
    36 -    def raise_(t, v=None, tb=None):
    37          """Mimic the old 2.x raise behavior:
    38          Raise an exception of type t with value v using optional traceback tb
    39          """
    40          if v is None:
    41              v = t()
    42          if tb is None:
    43              raise v
    44          else:
    45              raise v.with_traceback(tb)
    46
    47 -    def iteritems(d):
    48          return iter(d.items())
    49
    50 -    def unichar(i):
    51          return chr(i)
    52
    53 -    def str2bin(s, encoding='latin-1'):
    54          """Convert str to binary type"""
    55          return s.encode(encoding)
    56
    57 -    def str2unicode(s):
    58          return s
    59
    60  else:
    61      INT_TYPES = (int, long)
    62      TEXT_TYPES = (unicode,)
    63      # includes both unicode and non-unicode strings:
    64      STRING_TYPES = (basestring,)
    65      BINARY_TYPES = (str,)
    66      CLASS_TYPES = (type, types.ClassType)
    67
    68      # the raise syntax will cause a parse error in Py3, so 'sneak' in a
    69      # definition that won't cause the parser to barf
    70      exec("""def raise_(t, v=None, tb=None):
    71      raise t, v, tb
    72  """)
    73
    74 -    def iteritems(d, **kw):
    75          return d.iteritems()
    76
    77 -    def unichar(i):
    78          return unichr(i)
    79
    80 -    def str2bin(s, encoding='latin-1'):
    81          return s
    82
    83 -    def str2unicode(s):
    84          return unicode(s, "unicode_escape")
    85