readline的用法

with open(r'C:\Users\admin\pycdtest\wanyue\llduizhang_20180207\33_1517970821000304388_119061116',encoding='utf-8') as f:
　　line = f.readline()
#print(type(line))
　　while line:
　　　　#对line进行操作

　　　　line = f.readline()#最后