New issue 728: py.test fails with version conflict with python 2.7
https://bitbucket.org/pytest-dev/pytest/issue/728/pytest-fails-with-version-conflict-with

Venkatesh-Prasad Ranganath:

I am trying to build pytest with python 2.7 on Mac OSX and I encounter the 
following error when I execute "python2.7 setup.py test".  Any idea what might 
be wrong?

running test
Traceback (most recent call last):
  File "pytest.py", line 10, in <module>
    raise SystemExit(pytest.main())
  File "/Users/temp/pytest-2.7.0/_pytest/config.py", line 32, in main
    config = _prepareconfig(args, plugins)
  File "/Users/temp/pytest-2.7.0/_pytest/config.py", line 85, in _prepareconfig
    pluginmanager=pluginmanager, args=args)
  File "/Users/temp/pytest-2.7.0/_pytest/core.py", line 521, in __call__
    return self._docall(self.methods, kwargs)
  File "/Users/temp/pytest-2.7.0/_pytest/core.py", line 528, in _docall
    firstresult=self.firstresult).execute()
  File "/Users/temp/pytest-2.7.0/_pytest/core.py", line 393, in execute
    return wrapped_call(method(*args), self.execute)
  File "/Users/temp/pytest-2.7.0/_pytest/core.py", line 109, in wrapped_call
    wrap_controller.send(call_outcome)
  File "/Users/temp/pytest-2.7.0/_pytest/helpconfig.py", line 28, in 
pytest_cmdline_parse
    config = outcome.get_result()
  File "/Users/temp/pytest-2.7.0/_pytest/core.py", line 138, in get_result
    py.builtin._reraise(*ex)
  File "/Users/temp/pytest-2.7.0/_pytest/core.py", line 123, in __init__
    self.result = func()
  File "/Users/temp/pytest-2.7.0/_pytest/core.py", line 394, in execute
    res = method(*args)
  File "/Users/temp/pytest-2.7.0/_pytest/config.py", line 636, in 
pytest_cmdline_parse
    self.parse(args)
  File "/Users/temp/pytest-2.7.0/_pytest/config.py", line 746, in parse
    self._preparse(args)
  File "/Users/temp/pytest-2.7.0/_pytest/config.py", line 713, in _preparse
    self.pluginmanager.consider_setuptools_entrypoints()
  File "/Users/temp/pytest-2.7.0/_pytest/core.py", line 278, in 
consider_setuptools_entrypoints
    plugin = ep.load()
  File "/Library/Python/2.7/site-packages/pkg_resources.py", line 2169, in load
    self.require(env, installer)
  File "/Library/Python/2.7/site-packages/pkg_resources.py", line 2183, in 
require
    items = working_set.resolve(reqs, env, installer)
  File "/Library/Python/2.7/site-packages/pkg_resources.py", line 627, in 
resolve
    raise VersionConflict(dist, req)
pkg_resources.VersionConflict: (pytest 2.7.0 (/Users/temp/pytest-2.7.0), 
Requirement.parse('pytest==2.5.2'))



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