add text to the beginning of my text file

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add text to the beginning of my text file

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I was trying to add text to a text file at the beginning but it always puts it at the end. My question is how could I make the text that I add, in python, add it to me at the beginning and not at the end? I will have a text file, eg:

Mifichero.txt

Then I wanted to put text at the beginning so that.

The new text that I will write in my file

Any possible way to put the text at the beginning using python?

python

asked by Sergio Ramos 09.03.2018 в 00:07

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1 answer

Help I need to read Java files Extract table data from one bbdd to another

score 2 · Answer 1

Depends on how the file is being opened according to a,w,a+,r.. to write before you can use the r+ option in a function like this:

def primeralinea(archivo, nuevotexto):
    with open(archivo, 'r+') as f:
        contenido = f.read()
        f.seek(0, 0)
        f.write(nuevotexto.rstrip('\r\n') + '\n' + contenido)

primeralinea('Mifichero.txt','textonuevo')