Python入门习题大全——Python学习笔记-蒲公英云

Python入门习题大全——Python学习笔记

小鱼儿 2023-07-24 14:46 91阅读 0赞

Python入门习题大全——索引

在文本编辑器中新建一个文件，写几句话来总结一下你至此学到的Python知识，其中每一行都以“In Python youcan”打头。将这个文件命名为learning_python.txt。编写一个程序，它读取这个文件，并将你所写的内容打印三次：第一次打印时读取整个文件；第二次打印时遍历文件对象；第三次打印时将各行存储在一个列表中，再在with代码块外打印它们。

# Python 学习笔记
filename = 'learning_python.txt'
with open(filename) as file_object:
    contents = file_object.read()
    print(contents)
with open(filename) as file_object:
    for line in file_object:
        print(line.rstrip())
with open(filename) as file_object:
    lines = file_object.readlines()
print(lines)
learning = ''
for line in lines:
    learning += line
print(learning)

文件内容为：

In Python I can use any kind of num
In Python I can use letter with any operation
In Python I can use list, tuple, dictionary, for, while
In Python I can use function, class, file

输出为：

In Python I can use any kind of num
In Python I can use letter with any operation
In Python I can use list, tuple, dictionary, for, while
In Python I can use function, class, file
In Python I can use any kind of num
In Python I can use letter with any operation
In Python I can use list, tuple, dictionary, for, while
In Python I can use function, class, file
['In Python I can use any kind of num\n', 'In Python I can use letter with any operation\n', 'In Python I can use list, tuple, dictionary, for, while\n', 'In Python I can use function, class, file']
In Python I can use any kind of num
In Python I can use letter with any operation
In Python I can use list, tuple, dictionary, for, while
In Python I can use function, class, file