Python: Convert contents of a file to Uppercase characters only

Question

I am trying to convert the contents a set of files to only uppercase characters. Heres the code I have so far:

import os

def test():
    os.chdir(\"C:/Users/Dav         


        

Answer 1

import os
def test(x):
    with open(x, "r+b") as file:
        content = file.read()
        file.seek(0)
        file.write(content.upper())

The above should work if you pass the file name in x

Below is command line version to do the same for a single file & you can invoke from the terminal by ls -1 | parallel python upper.py

import os, sys
with open(sys.argv[1], "r+b") as file:
    content = file.read()
    file.seek(0)
    file.write(content.upper())