python程序导入模块的命令是,python无法导入模块

男娘i 2022-08-30 05:26 259阅读 0赞

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I am working on a package in Python. I use virtualenv. I set the path to the root of the module in a .pth path in my virtualenv, so that I can import modules of the package while developing the code and do testing (Question 1: is it a good way to do?). This works fine (here is an example, this is the behavior I want):

(VEnvTestRc) zz@zz:~/Desktop/GitFolders/rc$ python

Python 2.7.12 (default, Jul 1 2016, 15:12:24)

\[GCC 5.4.0 20160609\] on linux2

Type "help", "copyright", "credits" or "license" for more information.

>>> from rc import ns

>>> exit()

(VEnvTestRc) zz@zz:~/Desktop/GitFolders/rc$ python tests/test\_ns.py

issued command: echo hello

command output: hello

However, if I try to use PyTest, I get some import error messages:

(VEnvTestRc) zz@zz:~/Desktop/GitFolders/rc$ pytest

=========================================== test session starts ============================================

platform linux2 -- Python 2.7.12, pytest-3.0.5, py-1.4.31, pluggy-0.4.0

rootdir: /home/zz/Desktop/GitFolders/rc, inifile:

collected 0 items / 1 errors

================================================== ERRORS ==================================================

\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ ERROR collecting tests/test\_ns.py \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_

ImportError while importing test module '/home/zz/Desktop/GitFolders/rc/tests/test\_ns.py'.

Hint: make sure your test modules/packages have valid Python names.

Traceback:

tests/test\_ns.py:2: in

from rc import ns

E ImportError: cannot import name ns

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Interrupted: 1 errors during collection !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

========================================= 1 error in 0.09 seconds ==========================================

(VEnvTestRc) zz@zz:~/Desktop/GitFolders/rc$ which pytest

/home/zz/Desktop/VirtualEnvs/VEnvTestRc/bin/pytest

I am a bit puzzled, it looks like this indicates an import error, but Python does it fine so why is there a problem specifically with PyTest? Any suggestion to the reason / remedy (Question 2)? I googled and stack-overflowed the 'ImportError: cannot import' error for PyTest, but the hits I got were related to missing python path and remedy to this, which does not seem to be the problem here. Any suggestions?

解决方案

Found the answer:

DO NOT put a \_\_init\_\_.py file in a folder containing TESTS if you plan on using pytest. I had one such file, deleting it solved the problem.

This was actually buried in the comments to the second answer of PATH issue with pytest 'ImportError: No module named YadaYadaYada' so I did not see it, hope it gets more visibility here.

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