ImportError：DLL加載失敗-嘗試導入spynner時

Question

當我運行導入spynner的代碼時，出現以下錯誤：

> python .\spynner-test.py
Traceback (most recent call last):
  File ".\spynner-test.py", line 10, in <module>
    import spynner
  File "C:\Anaconda\lib\site-packages\spynner\__init__.py", line 2, in <module>
    from browser import *
  File "C:\Anaconda\lib\site-packages\spynner\browser.py", line 56, in <module>
    from PyQt4.QtNetwork import QNetworkCookie, QNetworkAccessManager, QSslConfiguration, QSslCipher
ImportError: DLL load failed: The specified procedure could not be found.

有趣的是，我可以將這些東西導入普通的python shell中而沒有任何問題：

> python
Python 2.7.5 |Anaconda 1.9.2 (64-bit)| (default, Jul  1 2013, 12:37:52) [MSC v.1500 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> from PyQt4.QtNetwork import QNetworkCookie, QNetworkAccessManager, QSslConfiguration, QSslCipher
>>>

但是在import spynner失敗后，

> python
Python 2.7.5 |Anaconda 1.9.2 (64-bit)| (default, Jul  1 2013, 12:37:52) [MSC v.1500 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import spynner
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Anaconda\lib\site-packages\spynner\__init__.py", line 2, in <module>
    from browser import *
  File "C:\Anaconda\lib\site-packages\spynner\browser.py", line 56, in <module>
    from PyQt4.QtNetwork import QNetworkCookie, QNetworkAccessManager, QSslConfiguration, QSslCipher
ImportError: DLL load failed: The specified procedure could not be found.
>>> from PyQt4.QtNetwork import QNetworkCookie, QNetworkAccessManager, QSslConfiguration, QSslCipher
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: DLL load failed: The specified procedure could not be found.
>>>

Answer 1

好吧，我知道了。 問題是spynner首先嘗試導入PySide ，並且在從PyQt4.QtNetwork導入QSslConfiguration時遇到錯誤。 然后切換到PyQt4 ，顯然先前導入的PySide使PyQt4導入失敗。 當我刪除browser.py中的try:部分時，我可以導入spynner fine。