Python读取txt文件

Python读取txt文件，有两种方式：

(1)逐行读取

 data=open("data.txt")
 line=data.readline()
 while line:
       print line
       line=data.readline()

(2)一次全部读入内存

 data=open("data.txt")
 for line in data.readlines():
       print line