A quick python script to append lines to the end of a file and create the file if it doesn't exist.

appendToFile.py

from os.path import abspath, exists

def appendToFile(filename, content):
	f_path = abspath(filename)
	mode = 'r+' if exists(f_path) else 'a+'
	with open(f_path, mode) as f:
		txt = f.read()
		f.write(content+'\n')

# Example Usage
appendToFile(input('file: '), input('stuff to append: '))

# 20 minute coding challenges are fun!