Python文件的读写

相比java而言，Python用几行代码就可以代替java十来行的代码，真的非常不错
'''
Created on 2009-9-2
@author: jiangqh
'''
# file create and write
context = '''hello world
hello china '''
f = file("hello.txt",'w')
f.write(context)
f.close()
文件创建
#use readline() read file
f = open("hello.txt")
while True:
line = f.readline()
if line:
print line
else :
break
f.close()
一行一行的读取
# read more lines
f = file("hello.txt")
lines = f.readlines()
for line in lines:
print line
多行读取
一次性全读出文件里的内容
'''
Created on 2009-9-2
@author: jiangqh
'''
f = open("hello.txt")
context = f.read()
print context
f = open("hello.txt")
context = f.read(5) #读取前五字节
print context
print f.tell() #获得当前指针的位置
context = f.read(5) #继续当前读取五位
print context
print f.tell() #获得当前指针的位置
f.close()