python文件读取
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)