Python文件的读写

 

 

with open('demo.txt'  ,    'w'   ) as  f:
    f.write ( 'python open txt and write' )

fr = open(abs_txt_path, 'r')
fw = open(new_txt_path, 'w')

for line in fr.readlines():
     sp = line.split()
     # print(sp)
     new_line = [sp[0],'-1',sp[1],sp[2],sp[3],sp[4]]
     # print(new_line)
     fw.write(" ".join([str(a) for a in new_line]) + '\n')

fr.close()
fw.close()

File对象的属性

一个文件被打开后，就会有一个file对象

#!/usr/bin/python
# -*- coding: UTF-8 -*-
 
# 打开一个文件
fo = open("foo.txt", "w")
print "文件名: ", fo.name
print "是否已关闭 : ", fo.closed
print "访问模式 : ", fo.mode
print "末尾是否强制加空格 : ", fo.softspace