Python安装在本地目录。

我的目录树是这样的:

(local directory)/site-packages/toolkit/interface.py

我的代码在这里:

(local directory)/site-packages/toolkit/examples/mountain.py

为了运行这个例子,我编写了python mountain.py,在代码中我有:

from toolkit.interface import interface

我得到了一个错误:

Traceback (most recent call last):
  File "mountain.py", line 28, in ?
    from toolkit.interface import interface
ImportError: No module named toolkit.interface

我已经检查过系统了。这里有目录/site-packages。此外,我在工具包文件夹中有__init__.py.bin文件,以向Python表明这是一个包。我在examples目录中也有一个__init__.py.bin。

我不知道为什么Python无法在sys.path中找到该文件。什么好主意吗?会是权限问题吗?我需要一些执行许可吗?


当前回答

通过编写print (sys.path)修复了我的问题,并发现尽管清洁安装,python仍在使用过时的包。删除这些会使python自动使用正确的包。

其他回答

根据你对orip帖子的评论,我猜事情是这样的:

You edited __init__.py on windows. The windows editor added something non-printing, perhaps a carriage-return (end-of-line in Windows is CR/LF; in unix it is LF only), or perhaps a CTRL-Z (windows end-of-file). You used WinSCP to copy the file to your unix box. WinSCP thought: "This has something that's not basic text; I'll put a .bin extension to indicate binary data." The missing __init__.py (now called __init__.py.bin) means python doesn't understand toolkit as a package. You create __init__.py in the appropriate directory and everything works... ?

我的观点是:

随地吐痰:

Traceback (most recent call last):
      File "bash\bash.py", line 454, in main
        import bosh
      File "Wrye Bash Launcher.pyw", line 63, in load_module
        mod = imp.load_source(fullname,filename+ext,fp)
      File "bash\bosh.py", line 69, in <module>
        from game.oblivion.RecordGroups import MobWorlds, MobDials, MobICells, \
    ImportError: No module named RecordGroups

This confused the hell out of me - went through posts and posts suggesting ugly syspath hacks (as you see my __init__.py were all there). Well turns out that game/oblivion.py and game/oblivion was confusing python which spit out the rather unhelpful "No module named RecordGroups". I'd be interested in a workaround and/or links documenting this (same name) behavior -> EDIT (2017.01.24) - have a look at What If I Have a Module and a Package With The Same Name? Interestingly normally packages take precedence but apparently our launcher violates this.

编辑(2015.01.17):我没有提到我们使用一个自定义启动器解剖这里。

我也有类似的问题。我创建了一个名为python3.6的新虚拟环境。

conda create -n python3.6 python=3.6
pip install pandas

一切正常,但当我运行脚本时,发生了一个错误

ModuleNotFoundError: No module named 'pandas'

我发现Python包的元数据和pip的缓存已经更新,但它实际上没有下载pandas包。 所以我试着让皮普重新安装

pip uninstall pandas --no-cache-dir
pip install pandas 

这就解决了问题。

你正在阅读这个答案说你的__init__.py是在正确的地方,你已经安装了所有的依赖项,你仍然得到ImportError。

我也遇到了类似的问题,除了我的程序在使用PyCharm运行时运行良好,但当我从终端运行时出现上述错误。在深入研究之后,我发现PYTHONPATH没有项目目录的条目。所以,我设置PYTHONPATH每个Import语句在PyCharm上工作,但不是从终端:

export PYTHONPATH=$PYTHONPATH:`pwd`  (OR your project root directory)

还有另一种方法可以使用sys。路径为:

import sys
sys.path.insert(0,'<project directory>') OR
sys.path.append('<project directory>')

您可以根据希望搜索项目的顺序使用插入/追加。

在*nix上,还要确保PYTHONPATH配置正确,特别是它具有以下格式:

 .:/usr/local/lib/python

(注意开头的.:,这样它也可以在当前目录上搜索。)

它也可能在其他位置,取决于版本:

 .:/usr/lib/python
 .:/usr/lib/python2.6
 .:/usr/lib/python2.7 and etc.