Write - change 1 line anywhere in python file

writeline_in_file.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

# HOW TO WORK:
# >> writeline_in_file("./folder/myfile.txt", 12, "I write this line in line 12")
# if you want another carriage return read "open() > newline" python manual


def writeline_in_file(path, numline, str, cr=None):
	try:
		with open(path, 'r') as file_data:
			lines_data = file_data.readlines()
			lines = copy(lines_data)
	except FileNotFoundError:
		return -1
	if numline < 1:
		return -1
	nbline = len(lines)
	for i in range(nbline):
		lines[i] = lines[i].replace('\r\n', '')
		lines[i] = lines[i].replace('\r', '')
		lines[i] = lines[i].replace('\n', '')
	while nbline <= numline:
		nbline += 1
		lines.append("")
	lines[numline-1] = str
	with open(path, "w", newline=cr) as file:
		for item in lines:
			file.write("%s\n" % (item))
	del lines
	return 0