Python2.7 安装mock出现AttributeError: 'module' object has no attribute的解决方法
原环境：
1.pip --verson ： 1.0 from /usr/lib/python2.7/dist-packages (python 2.7)
2.uname -a ：Linux pc 3.2.0-29-generic #46-Ubuntu SMP Fri Jul 27 17:03:23 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
3.root权限
之后：
2.pip -V：pip 9.0.1 from /usr/local/lib/python2.7/dist-packages (python 2.7)
问题：
安装mock出错
pip install -U mock
Downloading/unpacking mock
Downloading mock-2.0.0.tar.gz (73Kb): 73Kb downloaded
Running setup.py egg_info for package mock
Installed /tmp/build/mock/pbr-1.10.0-py2.7.egg
ERROR:root:Error parsing
Traceback (most recent call last):
File "/tmp/build/mock/pbr-1.10.0-py2.7.egg/pbr/core.py", line 111, in pbr
attrs = util.cfg_to_args(path, dist.script_args)
File "/tmp/build/mock/pbr-1.10.0-py2.7.egg/pbr/util.py", line 248, in cfg_to_args
kwargs = setup_cfg_to_setup_kwargs(config, script_args)
File "/tmp/build/mock/pbr-1.10.0-py2.7.egg/pbr/util.py", line 431, in setup_cfg_to_setup_kwargs
if pkg_resources.evaluate_marker('(%s)' % env_marker):
AttributeError: 'module' object has no attribute 'evaluate_marker'
error in setup command: Error parsing /tmp/build/mock/setup.cfg: AttributeError: 'module' object has no attribute 'evaluate_marker'
Complete output from command python setup.py egg_info:
Installed /tmp/build/mock/pbr-1.10.0-py2.7.egg
ERROR:root:Error parsing
Traceback (most recent call last):
File "/tmp/build/mock/pbr-1.10.0-py2.7.egg/pbr/core.py", line 111, in pbr
attrs = util.cfg_to_args(path, dist.script_args)
File "/tmp/build/mock/pbr-1.10.0-py2.7.egg/pbr/util.py", line 248, in cfg_to_args
kwargs = setup_cfg_to_setup_kwargs(config, script_args)
File "/tmp/build/mock/pbr-1.10.0-py2.7.egg/pbr/util.py", line 431, in setup_cfg_to_setup_kwargs
if pkg_resources.evaluate_marker('(%s)' % env_marker):
AttributeError: 'module' object has no attribute 'evaluate_marker'
error in setup command: Error parsing /tmp/build/mock/setup.cfg: AttributeError: 'module' object has no attribute 'evaluate_marker'
----------------------------------------
Command python setup.py egg_info failed with error code 1
Storing complete log in /root/.pip/pip.log
通过
更新pip之后再安装即可[1]：
pip install --upgrade pip
之后出现其他问题：
>>> from mock import MagicMock
Traceback (most recent call last):
File "", line 1, in
File "/usr/local/lib/python2.7/dist-packages/mock/__init__.py", line 2, in
import mock.mock as _mock
File "/usr/local/lib/python2.7/dist-packages/mock/mock.py", line 71, in
_v = VersionInfo('mock').semantic_version()
File "/usr/local/lib/python2.7/dist-packages/pbr/version.py", line 460, in semantic_version
self._semantic = self._get_version_from_pkg_resources()
File "/usr/local/lib/python2.7/dist-packages/pbr/version.py", line 447, in _get_version_from_pkg_resources
result_string = packaging.get_version(self.package)
File "/usr/local/lib/python2.7/dist-packages/pbr/packaging.py", line 725, in get_version
raise Exception("Versioning for this project requires either an sdist"
Exception: Versioning for this project requires either an sdist tarball, or access to an upstream git repository. Are you sure that git is installed?
有人说
[2]pip install --upgrade distribute 可以解决，结果这一步也不能顺利。
Collecting distribute
Using cached distribute-0.7.3.zip
Complete output from command python setup.py egg_info:
running egg_info
creating pip-egg-info/distribute.egg-info
writing requirements to pip-egg-info/distribute.egg-info/requires.txt
writing pip-egg-info/distribute.egg-info/PKG-INFO
writing top-level names to pip-egg-info/distribute.egg-info/top_level.txt
writing dependency_links to pip-egg-info/distribute.egg-info/dependency_links.txt
Traceback (most recent call last):
File "", line 1, in
File "/tmp/pip-build-gVJGPE/distribute/setup.py", line 58, in
setuptools.setup(**setup_params)
File "/usr/lib/python2.7/distutils/core.py", line 152, in setup
dist.run_commands()
File "/usr/lib/python2.7/distutils/dist.py", line 953, in run_commands
self.run_command(cmd)
File "/usr/lib/python2.7/distutils/dist.py", line 972, in run_command
cmd_obj.run()
File "setuptools/command/egg_info.py", line 177, in run
writer = ep.load(installer=installer)
File "pkg_resources.py", line 2241, in load
if require: self.require(env, installer)
File "pkg_resources.py", line 2254, in require
working_set.resolve(self.dist.requires(self.extras),env,installer)))
File "pkg_resources.py", line 2471, in requires
dm = self._dep_map
File "pkg_resources.py", line 2682, in _dep_map
self.__dep_map = self._compute_dependencies()
File "pkg_resources.py", line 2699, in _compute_dependencies
from _markerlib import compile as compile_marker
ImportError: No module named _markerlib
之后尝试升级
pip install -U setuptools，然而还是报同样的错误;
使用 easy_install -U distribute
[3] ，终于成功安装mock。
参考资料：
1. https://github.com/wal-e/wal-e/issues/241
2. https://github.com/tensorflow/tensorflow/issues/6411
3. http://www.jianshu.com/p/2619b2289acc