【交作业啦】
ex15.py

# 从sys软件包中取出argv这个特性 from sys import argv  script, filename = argv  txt = open(filename)  print(f"Here is your file {filename}:") print(txt.read())  txt.close()  print("Type the filename again:") file_again = input("> ")  txt_again = open(file_again)  print(txt_again.read())  txt_again.close() 

【会话】
1 运行ex15.py
2 在python中直接打开文件

PS E:lpthw> python ex15.py ex15_sample.txt Here is 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 and lots of fun to have in here.  PS E:lpthw> python Python 3.8.0 (tags/v3.8.0:fa919fd, Oct 14 2019, 19:21:23) [MSC v.1916 32 bit (Intel)] on win32 Type "help", "copyright", "credits" or "license" for more information. >>> filename = input() ex15_sample.txt >>> txt = open(filename) >>> txt.read() 'This is stuff I typed into a file.nIt is really cool stuff.nLots and lots of fun to have in here.n' >>> quit() PS E:lpthw> 

【学习心得】
1 在python提示符下使用open()打开文件,作者期望怎样实现?
2 python与c的区别:
python脚本中不需要main()函数,直接顺序执行了。不过,到目前为止,脚本中还没有出现任何函数,后面学到函数后,需要再关注下。

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