Problem 2.4
Upper Case
Write a program uppercase.py that takes a filename as command-line argument and prints all the contents of the file in uppercase.
$ cat files/five.txt
One
Two
Three
Four
Five
$ python uppercase.py files/five.txt
ONE
TWO
THREE
FOUR
FIVE
Solution
import sys
path = sys.argv[1]
contents = open(path).read()
print(contents.upper())