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Path: ~//proc/self/root/lib/python2.7/site-packages/google/protobuf/internal/

File Content: `api_implementation.py`

# Protocol Buffers - Google's data interchange format
# Copyright 2008 Google Inc.  All rights reserved.
# https://developers.google.com/protocol-buffers/
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
#     * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
#     * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following disclaimer
# in the documentation and/or other materials provided with the
# distribution.
#     * Neither the name of Google Inc. nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

"""Determine which implementation of the protobuf API is used in this process.
"""

import os
import warnings
import sys

try:
  # pylint: disable=g-import-not-at-top
  from google.protobuf.internal import _api_implementation
  # The compile-time constants in the _api_implementation module can be used to
  # switch to a certain implementation of the Python API at build time.
  _api_version = _api_implementation.api_version
  _proto_extension_modules_exist_in_build = True
except ImportError:
  _api_version = -1  # Unspecified by compiler flags.
  _proto_extension_modules_exist_in_build = False

if _api_version == 1:
  raise ValueError('api_version=1 is no longer supported.')
if _api_version < 0:  # Still unspecified?
  try:
    # The presence of this module in a build allows the proto implementation to
    # be upgraded merely via build deps rather than a compiler flag or the
    # runtime environment variable.
    # pylint: disable=g-import-not-at-top
    from google.protobuf import _use_fast_cpp_protos
    # Work around a known issue in the classic bootstrap .par import hook.
    if not _use_fast_cpp_protos:
      raise ImportError('_use_fast_cpp_protos import succeeded but was None')
    del _use_fast_cpp_protos
    _api_version = 2
  except ImportError:
    try:
      # pylint: disable=g-import-not-at-top
      from google.protobuf.internal import use_pure_python
      del use_pure_python  # Avoids a pylint error and namespace pollution.
    except ImportError:
      if _proto_extension_modules_exist_in_build:
        if sys.version_info[0] >= 3:  # Python 3 defaults to C++ impl v2.
          _api_version = 2
          # TODO(b/17427486): Make Python 2 default to C++ impl v2.

_default_implementation_type = (
    'python' if _api_version <= 0 else 'cpp')

# This environment variable can be used to switch to a certain implementation
# of the Python API, overriding the compile-time constants in the
# _api_implementation module. Right now only 'python' and 'cpp' are valid
# values. Any other value will be ignored.
_implementation_type = os.getenv('PROTOCOL_BUFFERS_PYTHON_IMPLEMENTATION',
                                 _default_implementation_type)

if _implementation_type != 'python':
  _implementation_type = 'cpp'

if 'PyPy' in sys.version and _implementation_type == 'cpp':
  warnings.warn('PyPy does not work yet with cpp protocol buffers. '
                'Falling back to the python implementation.')
  _implementation_type = 'python'

# This environment variable can be used to switch between the two
# 'cpp' implementations, overriding the compile-time constants in the
# _api_implementation module. Right now only '2' is supported. Any other
# value will cause an error to be raised.
_implementation_version_str = os.getenv(
    'PROTOCOL_BUFFERS_PYTHON_IMPLEMENTATION_VERSION', '2')

if _implementation_version_str != '2':
  raise ValueError(
      'unsupported PROTOCOL_BUFFERS_PYTHON_IMPLEMENTATION_VERSION: "' +
      _implementation_version_str + '" (supported versions: 2)'
      )

_implementation_version = int(_implementation_version_str)


# Detect if serialization should be deterministic by default
try:
  # The presence of this module in a build allows the proto implementation to
  # be upgraded merely via build deps.
  #
  # NOTE: Merely importing this automatically enables deterministic proto
  # serialization for C++ code, but we still need to export it as a boolean so
  # that we can do the same for `_implementation_type == 'python'`.
  #
  # NOTE2: It is possible for C++ code to enable deterministic serialization by
  # default _without_ affecting Python code, if the C++ implementation is not in
  # use by this module.  That is intended behavior, so we don't actually expose
  # this boolean outside of this module.
  #
  # pylint: disable=g-import-not-at-top,unused-import
  from google.protobuf import enable_deterministic_proto_serialization
  _python_deterministic_proto_serialization = True
except ImportError:
  _python_deterministic_proto_serialization = False


# Usage of this function is discouraged. Clients shouldn't care which
# implementation of the API is in use. Note that there is no guarantee
# that differences between APIs will be maintained.
# Please don't use this function if possible.
def Type():
  return _implementation_type


# See comment on 'Type' above.
def Version():
  return _implementation_version


# For internal use only
def IsPythonDefaultSerializationDeterministic():
  return _python_deterministic_proto_serialization

# DO NOT USE: For migration and testing only. Will be removed when Proto3
# defaults to preserve unknowns.
if _implementation_type == 'cpp':
  try:
    # pylint: disable=g-import-not-at-top
    from google.protobuf.pyext import _message

    def GetPythonProto3PreserveUnknownsDefault():
      return _message.GetPythonProto3PreserveUnknownsDefault()

    def SetPythonProto3PreserveUnknownsDefault(preserve):
      _message.SetPythonProto3PreserveUnknownsDefault(preserve)
  except ImportError:
    # Unrecognized cpp implementation. Skipping the unknown fields APIs.
    pass
else:
  _python_proto3_preserve_unknowns_default = True

  def GetPythonProto3PreserveUnknownsDefault():
    return _python_proto3_preserve_unknowns_default

  def SetPythonProto3PreserveUnknownsDefault(preserve):
    global _python_proto3_preserve_unknowns_default
    _python_proto3_preserve_unknowns_default = preserve

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FILE FOLDER

Name	Size	Permission
import_test_package	---	0755
__init__.py	0 bytes	0644
__init__.pyc	156 bytes	0644
__init__.pyo	156 bytes	0644
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_parameterized.pyc	16322 bytes	0644
_parameterized.pyo	15875 bytes	0644
any_test_pb2.py	7130 bytes	0644
any_test_pb2.pyc	4957 bytes	0644
any_test_pb2.pyo	4957 bytes	0644
api_implementation.py	7070 bytes	0644
api_implementation.pyc	3452 bytes	0644
api_implementation.pyo	3452 bytes	0644
containers.py	20888 bytes	0644
containers.pyc	25064 bytes	0644
containers.pyo	25064 bytes	0644
decoder.py	31291 bytes	0644
decoder.pyc	26002 bytes	0644
decoder.pyo	25908 bytes	0644
descriptor_database_test.py	4609 bytes	0644
descriptor_database_test.pyc	2623 bytes	0644
descriptor_database_test.pyo	2623 bytes	0644
descriptor_pool_test.py	43643 bytes	0644
descriptor_pool_test.pyc	36380 bytes	0644
descriptor_pool_test.pyo	36380 bytes	0644
descriptor_pool_test1_pb2.py	20924 bytes	0644
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descriptor_pool_test1_pb2.pyo	11296 bytes	0644
descriptor_pool_test2_pb2.py	12410 bytes	0644
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descriptor_pool_test2_pb2.pyo	7752 bytes	0644
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descriptor_test.pyo	33575 bytes	0644
encoder.py	28542 bytes	0644
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encoder.pyo	29338 bytes	0644
enum_type_wrapper.py	3554 bytes	0644
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json_format_test.py	41433 bytes	0644
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message_factory_test.py	9655 bytes	0644
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message_test.py	87617 bytes	0644
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more_messages_pb2.py	4262 bytes	0644
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packed_field_test_pb2.py	20344 bytes	0644
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service_reflection_test.py	5389 bytes	0644
service_reflection_test.pyc	5300 bytes	0644
service_reflection_test.pyo	5300 bytes	0644
symbol_database_test.py	5627 bytes	0644
symbol_database_test.pyc	4760 bytes	0644
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test_bad_identifiers_pb2.py	5943 bytes	0644
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testing_refleaks.py	4507 bytes	0644
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type_checkers.py	14229 bytes	0644
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wire_format.py	8444 bytes	0644
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wire_format_test.py	10907 bytes	0644
wire_format_test.pyc	6932 bytes	0644
wire_format_test.pyo	6932 bytes	0644

File Content: api_implementation.py

File Content: `api_implementation.py`