Arch Linux

Do you have PYTHONPATH or PYTHONHOME set?

For the record:
Python 3.5.1 (default, Mar 3 2016, 09:29:07)
[GCC 5.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import coverage
>>> print(coverage.__file__)
/usr/lib/python3.5/site-packages/coverage/__init__.py
>>>

Ping?

Oops sorry for the delay.

I've no PYTHONPATH nor PYTHONHOME.

Just right now, I've created a clean environment (container with clean arch), then:


$ pacman -S python-pytest nototools python-pytest-cov
$ cd /tmp
$ mkdir /test
$ echo $PYTHONPATH

$ echo $PYTHONPATH

$ py.test
[root@test tmp]# py.test
Traceback (most recent call last):
File "/usr/bin/py.test", line 9, in <module>
load_entry_point('pytest==2.9.1', 'console_scripts', 'py.test')()
File "/usr/lib/python3.5/site-packages/_pytest/config.py", line 39, in main
config = _prepareconfig(args, plugins)
File "/usr/lib/python3.5/site-packages/_pytest/config.py", line 118, in _prepareconfig
pluginmanager=pluginmanager, args=args)
File "/usr/lib/python3.5/site-packages/_pytest/vendored_packages/pluggy.py", line 724, in __call__
return self._hookexec(self, self._nonwrappers + self._wrappers, kwargs)
File "/usr/lib/python3.5/site-packages/_pytest/vendored_packages/pluggy.py", line 338, in _hookexec
return self._inner_hookexec(hook, methods, kwargs)
File "/usr/lib/python3.5/site-packages/_pytest/vendored_packages/pluggy.py", line 333, in <lambda>
_MultiCall(methods, kwargs, hook.spec_opts).execute()
File "/usr/lib/python3.5/site-packages/_pytest/vendored_packages/pluggy.py", line 595, in execute
return _wrapped_call(hook_impl.function(*args), self.execute)
File "/usr/lib/python3.5/site-packages/_pytest/vendored_packages/pluggy.py", line 249, in _wrapped_call
wrap_controller.send(call_outcome)
File "/usr/lib/python3.5/site-packages/_pytest/helpconfig.py", line 28, in pytest_cmdline_parse
config = outcome.get_result()
File "/usr/lib/python3.5/site-packages/_pytest/vendored_packages/pluggy.py", line 278, in get_result
raise ex[1].with_traceback(ex[2])
File "/usr/lib/python3.5/site-packages/_pytest/vendored_packages/pluggy.py", line 264, in __init__
self.result = func()
File "/usr/lib/python3.5/site-packages/_pytest/vendored_packages/pluggy.py", line 596, in execute
res = hook_impl.function(*args)
File "/usr/lib/python3.5/site-packages/_pytest/config.py", line 861, in pytest_cmdline_parse
self.parse(args)
File "/usr/lib/python3.5/site-packages/_pytest/config.py", line 966, in parse
self._preparse(args, addopts=addopts)
File "/usr/lib/python3.5/site-packages/_pytest/config.py", line 927, in _preparse
self.pluginmanager.load_setuptools_entrypoints("pytest11")
File "/usr/lib/python3.5/site-packages/_pytest/vendored_packages/pluggy.py", line 501, in load_setuptools_entrypoints
plugin = ep.load()
File "/usr/lib/python3.5/site-packages/pkg_resources/__init__.py", line 2229, in load
return self.resolve()
File "/usr/lib/python3.5/site-packages/pkg_resources/__init__.py", line 2235, in resolve
module = __import__(self.module_name, fromlist=['__name__'], level=0)
File "/usr/lib/python3.5/site-packages/pytest_cov/plugin.py", line 5, in <module>
from coverage.misc import CoverageException
File "/usr/bin/coverage.py", line 80
print 'U+%04X %s' % (char, name)
^

I give up, I'm not sure why it's doing this. We'll start with python-pytest-cov, as that's my best guess of where the problem lies.

pytest-cov is just importing coverage, which points to /usr/bin/coverage.py because it is in the same dir as the executable you invoked (/usr/bin/py.test).

I am afraid we have to make python-coverage conflict with nototools until it is fixed upstream (e.g. don't install coverage.py into /usr/bin).