笨方法学Python 习题 15: 读取文件

最新推荐文章于 2025-04-22 18:13:09 发布

3ndO13

最新推荐文章于 2025-04-22 18:13:09 发布

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分类专栏：笨方法学Python 文章标签：笨方法学Python python

本文链接：https://blog.youkuaiyun.com/u011692485/article/details/76187112

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本文介绍了Python中读取文件的技巧，包括注释文件功能、理解open()和read()的区别、使用pydoc探索文件方法，以及强调在处理文件后调用close()的重要性。此外，解答了关于文件对象、命令行运行Python代码、sys.argv用法和多次打开文件不报错的疑问。

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#!usr/bin/python
# -*-coding:utf-8-*-

from sys import argv

script, filename = argv
#获取参数 给script赋值ex15.py filename赋值ex15_sample.txt 

txt = open(filename)
#打开 ex15_sample.txt文本

print ("Here's your file %r:" % filename)
#打印 Here's your file ex15_sample.txt
print (txt.read())
#打印 ex15_sample.txt文本内容
print ("I'll also ask you to type it again:")
#打印 I'll also ask you to type it again:
file_again = input("> ")
#输入为file_again赋值
txt_again = open(file_again)
#打开file_again文本
print (txt_again.read())
#打印file_again文本

运行结果如下：

python ex15.py ex15_sample.txt 
Here's your file 'ex15_sample.txt':
This is stuff I typed into a file.
It is really cool stuff.
Lots and lots of fun to have in here.


Type the filename again:
> ex15_sample.txt
This is stuff I typed into a file.
It is really cool stuff.
Lots an