Python 2.7、dpkt和pyvisa

Question

当我简单地使用这一行代码时：

import dpkt

我得到了这个错误：

Traceback (most recent call last):
  File "<pyshell#1>", line 1, in <module>
    import dpkt
  File "C:\Python27\lib\dpkt\__init__.py", line 24, in <module>
    import ethernet
  File "C:\Python27\lib\dpkt\ethernet.py", line 128, in <module>
    __load_types()
  File "C:\Python27\lib\dpkt\ethernet.py", line 122, in __load_types
    mod = __import__(modname, g)
  File "C:\Python27\lib\dpkt\ip6.py", line 101, in <module>
    import ip
  File "C:\Python27\lib\dpkt\ip.py", line 258, in <module>
    __load_protos()
  File "C:\Python27\lib\dpkt\ip.py", line 255, in __load_protos
    IP.set_proto(v, getattr(mod, name.upper()))
AttributeError: 'module' object has no attribute 'VISA'

可能的问题是什么？

Answer 1

dpkt issue页面提供了解决此问题的修补程序。https://code.google.com/p/dpkt/issues/detail?id=34上的第二个补丁修复了导入问题。