Python实战(1)模拟wc命令部分功

#!/usr/bin/env python 
''' 
        Author:diege 
        Email:diege@foxmail.com 
        Date:2012-03-04 
        Useage:wc.py filename 
''' 
#import sys 
#filename=raw_input('Enter FileName:') 
#filename=sys.argv[1] 
from sys import argv as getargv 
filename=getargv[1] 
def CountLines(filename): 
        countlines='' 
        countlines=len(open(filename).readlines()) 
        return countlines 
def ConutChars(filename): 
        conutchars='' 
        conutchars=len(open(filename).readlines()) 
        return conutchars 
def GetFileInfo(filename): 
        countlines=CountLines(filename) 
        conutchars=ConutChars(filename) 
        print 'file:%s,line:%s,chars:%s' %(filename,countlines,conutchars) 
if __name__=='__main__': 
        ''' 
        #debug 
        print filename 
        countlines=len(open(filename).readlines()) 
        conutchars=len(open(filename).readlines()) 
        print 'file:%s,line:%s,chars:%s' %(filename,countlines,conutchars) 
        ''' 
        GetFileInfo(filename) 

# python wc.py module.py 
Traceback (most recent call last): 
  File "wc.py", line 25, in <module> 
    GetFileInfo(filename) 
  File "wc.py", line 15, in GetFileInfo 
    conutchars=ConutChars(filename) 
  File "wc.py", line 12, in ConutChars 
    return countlines 
NameError: global name 'countlines' is not defined