爲什麼我得到一個python ImportError：沒有名爲html_parser的模塊？

Question

上週我將機器升級到了優勝美地。現在嘗試運行鵜鶘devserver當我得到一個ImportError：

$ ./develop_server.sh start 
Starting up Pelican and HTTP server 
Traceback (most recent call last): 
    File "/usr/local/bin/pelican", line 7, in <module> 
    from pelican import main 
    File "/Library/Python/2.7/site-packages/pelican/__init__.py", line 20, in <module> 
    from pelican.generators import (ArticlesGenerator, PagesGenerator, 
    File "/Library/Python/2.7/site-packages/pelican/generators.py", line 23, in <module> 
    from pelican.readers import Readers 
    File "/Library/Python/2.7/site-packages/pelican/readers.py", line 24, in <module> 
    from six.moves.html_parser import HTMLParser 
ImportError: No module named html_parser 
/usr/bin/python: No module named html_parser 
Pelican didn't start. Is the Pelican package installed? 
Stale PID, deleting 
Stale PID, deleting 

我從REPL試圖做一個直接進口時，得到了同樣的錯誤，但將模塊安裝：

$ /usr/bin/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 
KeyboardInterrupt 
>>> from six.moves.html_parser import HTMLParser 
Traceback (most recent call last): 
    File "<stdin>", line 1, in <module> 
ImportError: No module named html_parser 
>>> import six 
>>> six.moves.html_parser 
<module 'HTMLParser' from '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/HTMLParser.pyc'> 
>>> six.moves.html_parser.HTMLParser 
<class HTMLParser.HTMLParser at 0x10b751530> 
>>> 

上午我錯過了明顯的東西？這裏發生了什麼？

Answer 1

六庫使用了一些高級的進口魔法。 html_parser的進口必須以特殊方式完成。 from six.moves import html_parser通常有效。如果您有第三方代碼嘗試以其他方式從六個導入，則可以先導入six和/或six.moves，然後再導入其他任何東西。