文件名: base64.py

#coding:utf-8import base64s='mickelfeng'print base64.b64encode(s)

结果：

C:\Python27\python.exe base64.pyTraceback (most recent call last):  File "base64.py", line 2, in 
    
         import base64  File "base64.py", line 4, in 
     
          print base64.b64encode(s)AttributeError: 'module' object has no attribute 'b64encode'
     
    

结论：文件名不能与模块名同名