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[英]In Python: I need to take a text file with a poem and create a copy but with numbered lines 1., 2., ect
[英]How to take a text file and create a copy but with numbered lines
这首诗保存在一个文本文件中:
'Twas brillig, and the slithy toves Did gyre and gimble in the wabe; All mimsy were the borogroves, And the mom raths outgrabe. - Lewis Carroll
我想创建该文件的副本并更改名称,并使输出看起来像这样:
1: 'Twas brillig, and the slithy toves 2: Did gyre and gimble in the wabe; 3: All mimsy were the borogroves, 4: And the mom raths outgrabe. 5: - Lewis Carroll
可以使用循环来完成此操作吗?或者有更简单的方法来执行此操作吗?
您可以遍历诗歌文件的每一行,并使用enumerate获得行号:
with open('poem.txt') as poem_file:
with open('poem-numbered.txt', 'w') as numbered_file:
for index, line in enumerate(poem_file, 1):
numbered_file.write('{}: {}'.format(index, line))
上面的代码首先打开原始诗歌文件( poem.txt
),然后打开一个文件进行写入(因此, w
作为第二个参数open
)。 然后,它遍历原始文件的各行,并将该行与行号一起写入输出文件( poem-numbered.txt
)。
当将w
作为第二个参数传递给open时 ,如果文件已经存在,它将被覆盖,如果文件不存在,则将创建它。
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