习题16 读写文件
来源:互联网 发布:华为网络盒子怎么样 编辑:程序博客网 时间:2024/03/29 00:23
首先给出原始的程序
from sys import argvscript ,filename = argvprint "We're going to erase %r."% filenameprint "If you don't want that ,hit CTRL-C (^C)."print "If you do want that ,hit RETURN."raw_input("?")print "Opening the file..."target = open(filename, 'w')print "Truncating the file. Goodbye!"target.truncate()print "Now I'm going to ask you for three lines."line1 = raw_input("line 1: ")line2 = raw_input("line 2: ")line3 = raw_input("line 3: ")print "I'm going to write these to the file."target.write(line1)target.write("\n")target.write(line2)target.write("\n")target.write(line3)target.write("\n")print "And finally ,we close it."target.close()
这段程序就是用来写 test.txt 的,如果多次运行,由于存在 truncate命令,会擦掉以前写的东西
还有打开文件写完以后记得关闭文件
target.close()
运行结果如下
======================================================================================================
附加练习
1
#-*-coding:utf-8-*-from sys import argv #不解释script ,filename = argvprint "We're going to erase %r."% filename #刚刚输入的文件名print "If you don't want that ,hit CTRL-C (^C)."print "If you do want that ,hit RETURN."# 这两句话没看懂,好像想要你判断但是实际上并没有判断语句raw_input("?")# 并没有什么卵用,纯粹是为了停顿print "Opening the file..."target = open(filename, 'w') # 这里的 w 其实是以 写模式 打开文件print "Truncating the file. Goodbye!"target.truncate()# 清空目标文件保存的内容print "Now I'm going to ask you for three lines."line1 = raw_input("line 1: ")#输入三行字line2 = raw_input("line 2: ")line3 = raw_input("line 3: ")print "I'm going to write these to the file."target.write(line1)#写入target.write("\n")target.write(line2)target.write("\n")target.write(line3)target.write("\n")print "And finally ,we close it."target.close()#一定记得关闭文件
2.
写一个读取刚刚的test.txt 文件
其实和以前一样
3.花了好多时间
#-*-coding:utf-8-*-from sys import argv #不解释script ,filename = argvprint "We're going to erase %r."% filename #刚刚输入的文件名print "If you don't want that ,hit CTRL-C (^C)."print "If you do want that ,hit RETURN."# 这两句话没看懂,好像想要你判断但是实际上并没有判断语句raw_input("?")# 并没有什么卵用,纯粹是为了停顿print "Opening the file..."target = open(filename, 'w') # 这里的 w 其实是以 写模式 打开文件print "Truncating the file. Goodbye!"target.truncate()# 清空目标文件保存的内容print "Now I'm going to ask you for three lines."line1 = raw_input("line 1: ")#输入三行字line2 = raw_input("line 2: ")line3 = raw_input("line 3: ")print "I'm going to write these to the file."target.write(line1+'\n'+line2+'\n'+line3)#写入print "And finally ,we close it."target.close()#一定记得关闭文件print "Now we print it out:"txt = open('test.txt')#再次打开文件,记得里面直接输入文件名是要打引号的print txt.read()
0 0
- 习题16 读写文件
- 笨方法学Python 习题 16: 读写文件
- 笨方法学习Python-习题16: 读写文件
- 笨办法学python习题16 读写文件
- Python课后习题-第八章 读写文件
- 笨方法学python16习题 【读写文件】 最详解
- Exercise 16: 读写文件
- 练习16:文件读写
- C++16、文件读写
- 读写16进制数文件
- APUE习题:以O_APPEND标志open的文件,lseek后读写问题
- 笨办法16读写文件
- 文件读写、剪贴板读写
- 读写文件
- 文件读写
- 读写文件
- 读写文件
- 文件读写
- 每日一得--jvm虚拟机优化
- javascript针对DOM的应用(二)
- Opencv图像识别从零到精通(14)-----线性滤波和非线性滤波
- CodeForces 633A之Ebony and Ivory
- hdu4385(状态压缩dp)
- 习题16 读写文件
- QT:关闭外部程序
- Key Set hd 5363
- SDUT 2136 数据结构实验之二叉树的建立与遍历
- android studio中如何导入github项目
- HPU 4883 TIANKENG’s restaurant
- android studio Dagger2的使用(环境搭建和helloword)
- 1.Two Sum
- 最大类间方差法(大津法OTSU)