python学习之——计算文件行数

# -*- coding: cp936 -*-
#转载源于：http://blog.csdn.net/houyj1986/article/details/21196027
#计算文件行数
#1、文件比较小：
fobj = open(r"C:\test.txt",‘rU‘)
len_fobj = len(fobj.readlines())
print len_fobj

#2、文件比较大
len_fobj = -1  
for len_fobj,line in enumerate(open(r"C:\test.txt",‘rU‘)):
    pass  
len_fobj += 1
print len_fobj

#3、较好的方法
import string
len_fobj = 0  
fobj = open(r"C:\test.txt",‘rb‘)  
  
while True:  
    buffer = fobj.read(1024 * 8192)  
    if not buffer:  
        break  
    len_fobj += buffer.count(‘\n‘) 
fobj.close()    
print len_fobj