>>> file=open('c://333.csv','r')  一些基本打开关闭操作

 >>> s=file.read()

 >>> print s

 ,add,age,name

 0,beijing,12,zhang

 1,shanghai,24,li

 2,tainjing,25,wang

 >>> file.close()

 >>> file=open('c://333.csv','r')

 >>> file2=open('c://111.csv','w')   将333内容写到111中

 >>> file2.write(file.read())

 >>> file2.close()

 >>> file.close()

 >>> file2=open('c://111.csv')

 >>> file2=open('c://111.csv','r')

 >>> s=file2.read()

 >>> print s

 ,add,age,name

 0,beijing,12,zhang

 1,shanghai,24,li

 2,tainjing,25,wang