您必须将文件__ init__.py放在您要导入的文件所在的同一目录中。 不能尝试从PYTHONPATH上配置的两个文件夹中导入同名的文件。

例如: /etc/environment

PYTHONPATH = PYTHONPATH:美元/ opt / folder1: / opt / folder2

/opt/folder1/foo

/opt/folder2/foo

而且，如果你试图导入foo文件，python将不知道你想要哪个。

从foo import…>>> importerror:没有foo模块

要将一个目录标记为包，你需要一个名为__init__.py的文件，这有帮助吗?

Does

(local directory)/site-packages/toolkit

有__init__.py?

为了让导入遍历你的目录，每个目录必须有一个__init__.py文件。

在ubuntu apt-get安装程序中，python3版本的包通常被命名

python3-XYZ

以及python2版本

python-XYZ

根据经验，请尝试错误消息中提到的包的python3-XYZ或python-XYZ。 不需要猜测，使用RegEx搜索apt缓存。然后:

$ apt-cache search "python.*toolkit.*interface"
python3-cli-helpers - easy command-line apps with Python
python3-exam - Python module to help write better tests
python3-fltk - Python wrapper for the Fast Light Toolkit
python3-mpltoolkits.basemap - matplotlib toolkit to plot on map projections (Python 3)
python3-nltk - Python3 libraries for natural language processing
python3-onnx - Open Neural Network Exchange (ONNX) (Python)
python3-paraview - Parallel Visualization Application. python-support
python3-pyswarms - research toolkit for particle swarm optimization in Python
python3-wxgtk-media4.0 - Python 3 interface to the wxWidgets Cross-platform C++ GUI toolkit (wx.media)
python3-wxgtk-webview4.0 - Python 3 interface to the wxWidgets Cross-platform C++ GUI toolkit (wx.html2)
python3-wxgtk4.0 - Python 3 interface to the wxWidgets Cross-platform C++ GUI toolkit
python3-xapian - Xapian search engine interface for Python3
wxglade - GUI designer written in Python with wxPython

它没有找到它。

请注意，这种apt-get技巧有时也需要用于依赖的包。

我对python2.7的flask包有相同的错误消息，当我尝试时它消失了:

sudo apt-get install python-flask

因此,试一试:

sudo apt-get install python-[YOURPYTHONVERION]-[YOURERRORPACKAGE]

或者检查上面提到的依赖关系。

另一个原因导致了这个问题

file.py

#!/bin/python
from bs4 import BeautifulSoup

如果你的默认python是pyyhon2

$ file $(which python)
/sbin/python: symbolic link to python2

File.py在这种情况下需要python3 (bs4) 你不能像这样用python2执行这个模块:

$ python file.py
# or
$ file.py
# or
$ file.py # if locate in $PATH

两种方法来修复这个错误，

# should be to make python3 as default by symlink
$ rm $(which python) && ln -s $(which python3) /usr/bin/python
# or use alias
alias python='/usr/bin.../python3'

或者将file.py中的shebang修改为

#!/usr/bin/...python3

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... ?