python文件读取

时间:2021-01-26 13:29:54

1.如何将一个“lessons.txt”文档一行行输出?

myfile = file(‘lessons.txt’)

for f in myfile.readlines():
print f myfile.close()
#-*- coding:utf-8 -*-
file_path = "C:\\Users\\Administrator\\workspace\\template.txt" with open(file_path,'r') as f:
lines = f.readlines() #把整个文件全部读取到内存中,当作一个List
for line in lines:
print line

2.如果课程名称输入错误,会导致文件不存在,该怎么解决?

#!/usr/bin/env python
# -*- coding: utf-8 -*-
import datetime def get_file(file_path):
# 验证文件路径是否存在
# 通过路径返创建file对象
# 返回file对象
# xxxddfdvfv = file(file_path)
assert isinstance(file_path, str)
return file(file_path) myfile = get_file('lessons.txt')
for f in myfile.readlines():
print f
myfile.close()

解决思路:分装函数(因为文件名称是外部输入,所以需要分装函数,类似于一个异常处理)