本文实例讲述了python按行读取文件的实现方法。分享给大家供大家参考，具体如下：
小文件：
#coding=utf-8
#author: walker
#date: 2013-12-30
#function: 按行读取小文件
all_lines = []
try:
file = open('txt.txt', 'r')
all_lines = file.readlines()
except ioerror as err:
print('file error: ' + str(err))
finally:
if 'file' in locals():
file.close()
for line in all_lines:
print(line)
大文件：
#coding=utf-8
#author: walker
#date: 2013-12-30
#function: 按行读取大文件
try:
file = open('txt.txt', 'r')
for line in file:
print(line)
except ioerror as err:
print('file error: ' + str(err))
finally:
if 'file' in locals():
file.close()
更多python按行读取文件的实现方法【小文件和大文件读取】。