文件读写

一、读取文件

with open('pass.txt','r') as f:
      content = f.read()      //一次读取所有内容
      print(content)

with open('pass.txt','r') as f:           //将所有内容读取到一个列表中      
    for line in f.readlines():            //循环列表       
        if line.strip() == '333333':      //此时line为 '333333\n',line.strip()去除掉换行
            print('success')
            break
        else:
            continue
    else:
        print('error')

二、写入文件

with open('pass.txt','a') as f:            
   f.write('\nhello1\n')
   f.write('hello2\n')
   f.write('hello3\n')