在安装mechanize后，我似乎无法导入它。
我已经尝试从pip、easy_install和通过python setup.py从这个repo安装:https://github.com/abielr/mechanize。所有这些都无济于事，因为每次我输入Python交互时，我得到:
Python 2.7.3 (default, Aug 1 2012, 05:14:39)
[GCC 4.6.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import mechanize
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: No module named mechanize
>>>
我之前运行的安装报告已经成功完成，因此我希望导入能够正常工作。是什么导致了这个错误?
当前回答
I know, that this is very old post but I didn't find any answer that was useful in my case (I am using arch linux). I had a similar problem installing "nest_asyncio" package which was definitely installed (visible when listing all the installed packages). There is a right way for arch linux users of installing python packages (as it was already explained here by Emanuel Fontelles). In my case the solution was just to uninstall the remaining not-working package (in my case "nest_asyncio") and then installing it again using the following command:
sudo pacman - s python-"nest_asyncio .
这解决了所有的问题。
其他回答
我无法让PYTHONPATH正常工作。我意识到添加export修复了这个问题:
(工作)
export PYTHONPATH=$PYTHONPATH:~/test/site-packages
vs.
(没有工作)
PYTHONPATH=$PYTHONPATH:~/test/site-packages
我也遇到过同样的问题，但上面的答案都没用。我快被逼疯了，直到我注意到那个系统。当我从父项目导入后，路径就不同了。原来我用importlib写了一个小函数来导入一个不在项目层次结构中的文件。坏主意:我忘了我做过这件事。更糟糕的是，导入过程搅乱了系统。路径，然后就这样走了。非常糟糕的主意。
解决方案是停止这种情况，并简单地将我需要导入的文件导入到项目中。另一种方法是将文件放到它自己的项目中，因为它需要不时地重新构建，并且重新构建可能与主项目的重新构建不一致。
也有这个问题。这个包安装在Python 3.8.0上，但是VS Code使用旧版本(3.4)运行我的脚本。
终端修复:
py . py
确保在正确的Python版本上安装包
我在系统上安装2.7和3.5时遇到了这个问题，试图用Python-Telegram-Bot测试电报机器人。
在使用pip和pip3安装后，无论是否使用sudo，我都无法让它工作。我总是得到:
Traceback (most recent call last):
File "telegram.py", line 2, in <module>
from telegram.ext import Updater
File "$USER/telegram.py", line 2, in <module>
from telegram.ext import Updater
ImportError: No module named 'telegram.ext'; 'telegram' is not a package
正确地读取错误消息告诉我，python正在当前目录中查找telegram.py。我有一个脚本叫telegram。py当我调用import时，它被python加载了。
总结，确保在尝试导入时，当前工作目录中没有任何package.py。(并仔细阅读错误消息)。
I know, that this is very old post but I didn't find any answer that was useful in my case (I am using arch linux). I had a similar problem installing "nest_asyncio" package which was definitely installed (visible when listing all the installed packages). There is a right way for arch linux users of installing python packages (as it was already explained here by Emanuel Fontelles). In my case the solution was just to uninstall the remaining not-working package (in my case "nest_asyncio") and then installing it again using the following command:
sudo pacman - s python-"nest_asyncio .
这解决了所有的问题。
