Python example of inserting a line at the beginning of text

This article mainly introduces the example of inserting a line at the beginning of the text in python. It has certain reference value. Now I share it with you. Friends in need can refer to the

question.

For a text file, you need to insert a line at the beginning, leaving the other contents unchanged

Solution

with open('article.txt', 'r+') as f:
 content = f.read()  
 f.seek(0, 0)
 f.write('writer:Fatsheep\n'+content)

The string 'writer:Fatsheep\n' is the content to be inserted.

Effect

After running the code:

Note

##f.seek(0, 0) is indispensable, file.seek(off, whence=0) moves the file pointer in the file, Offset from whence (0 represents the beginning of the file, 1 represents the current position, 2 represents the end of the file) offset by bytes

If there is no it, the result of running is:

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