python3 写入文件首行 python中文件的写入

本文实例为大家分享了python文件写入write（）的操作的具体代码，供大家参考，具体内容如下

filename = "pragramming.txt"
with open(filename,"w") as fileobject: #使用"w"来提醒python用写入的方式打开
fileobject.write("I love your name!"
" I love your cloth!"
" I love your shoes!"
" I love your hair!")
with open(filename,"a") as fileobject: #使用"a"来提醒python用附加模式的方式打开
fileobject.write(" I an superman.")

代码中的filename如果没有这个文件，python会自己新建一个。

json文件的写入和读取：

import json
filename = "number.json"
def write_json():
numbers = [1,2,3,4,5,6,7,8,9,10]
with open(filename,"w") as fp:
json.dump(numbers,fp)#写入json文件
write_json()
def read_json():
with open(filename) as pf:
numbers = json.load(pf)#读取json文件
print(numbers)
read_json()

训练：

import json
def remember_me():
active = True
while active:
for i in range(5):
if i < 4:
username = input("Please enter your name:")
filename = "name.json"
with open(filename,"w") as fp:#以w的方式打开写入时会覆盖原有记录，而以a打开不会
json.dump(username,fp)
print("Hello! "+username.title())
else:
active = False
remember_me()

以上所述是小编给大家介绍的python文件写入write（）的操作详解整合，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。

本文标题: python文件写入write（）的操作