Python可以找到一个模块......然后它不能

Question

我终于开始全力投入使用 Python，但由于某种原因，我遇到了一个问题，即 Python 可以在交互式 CLI 中找到一个模块，然后在我编写脚本时却找不到。该模块特别是 mysql.connector 位于 /Library/Python/2.7/site-packages 。从交互式 CLI 会话中可以看到，它导入 mysql.connector 就好了。回显 sys.path 显示 'Library/Python/2.7/site-packages'

这是一个新的 CLI 窗口（我使用的是 Mac 10.10）。注意：最初当我登录时，我会弹出到我的主目录，这当然是正常的。

wilkie:~ wilkie$ which python
/usr/bin/python
wilkie:~ wilkie$ python
Python 2.7.6 (default, Sep  9 2014, 15:04:36) 
[GCC 4.2.1 Compatible Apple LLVM 6.0 (clang-600.0.39)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> import mysql.connector
>>> sys.path
['', '/Library/Python/2.7/site-packages/pip-7.1.0-py2.7.egg', '/Library/Python/2.7/site-packages/cx_Oracle-5.2-py2.7-macosx-10.10-intel.egg', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python27.zip', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-darwin', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac/lib-scriptpackages', '/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-old', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload', '/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/PyObjC', '/Library/Python/2.7/site-packages']
>>>

所以我只是换了一个目录...

cd /Users/wilkie/Projects/dataparse

就这样......它找不到 mysql.connector

wilkie:dataparse wilkie$ python
Python 2.7.6 (default, Sep  9 2014, 15:04:36) 
[GCC 4.2.1 Compatible Apple LLVM 6.0 (clang-600.0.39)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> sys.path
['', '/Library/Python/2.7/site-packages/pip-7.1.0-py2.7.egg', '/Library/Python/2.7/site-packages/cx_Oracle-5.2-py2.7-macosx-10.10-intel.egg', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python27.zip', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-darwin', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac/lib-scriptpackages', '/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-old', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload', '/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/PyObjC', '/Library/Python/2.7/site-packages']
>>> import mysql.connector
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "mysql.py", line 1, in <module>
    import mysql.connector
ImportError: No module named connector
>>>

我被官方难住了，不知道为什么会这样。有人遇到过吗？

Answer 1

您的主目录或新目录中有一个mysql 或其他东西。它可能是一个.py 文件，也可能是实际的包（在错误的位置；）。解决这个问题，您的问题就会消失。

Answer 2

在回溯中，我看到您将文件命名为 mysql.py。因此，当您尝试从mysql.py 导入某些内容时，解释器会在您自己的脚本中查找它，而不是在“实际”模块中查找。它没有撒下更大的网，而是立即放弃。要解决此问题，请将您的脚本重命名为不掩盖任何模块名称的名称。