Python3 读写文件

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 Python3 读写文件

#!/usr/bin/python3

# -*- coding: utf-8 -*-


#读文件

#with open('C:/Users/Administrator/Desktop/d100.txt', 'r', encoding='utf-8') as f:
#	print(f.read())


f = open('C:/Users/Administrator/Desktop/d100.txt', 'r', encoding='utf-8')

#每次读取一行
#for line in f.readlines():
#	print(line.strip())


#每次最多读取size个字符（r模式）的内容
s = f.read(50)
print(s,end='')
while 1:
	s = f.read(50)
	if len(s) <=0:
		break
	print(s,end='')

f.close()

#写文件   w模式 覆盖写   a模式  追加写
w = open('C:/Users/Administrator/Desktop/d100.txt', 'a', encoding='utf-8')
w.write("bbbb")
#换行写
w.write("\nccc")
w.close()

 

转载于:https://my.oschina.net/zb0423/blog/919014