def simple():
	with open("file.txt") as f:
		content = []
		for lines in f:
			content.append(lines.strip().split(","))
		doc_num, date, id, etc = content # define all the contents that are in a line
		# print(doc_num, date, id, etc)
		return doc_num, date, id, etc # Returns data

def csv_version():
	"""The same but working with csv.
	"""
	import os
	import csv

	with open("test.csv", newline="") as f:
		reader = csv.reader(f)
		for line in reader:
			print(line)

if __name__ == "__main__":
	choose = input("Use simple [1] or csv [2] : ")
	if choose == 1:
		simple()
	elif choose == 2:
		csv_version()
	else:
		return None