Simple script to format a garbled python Traceback where all new lines and tabs have been removed, and to add them back.

format_tb.py

#!/usr/bin/env python3
"""
Simple script to format a garbled python Traceback
where all new lines and tabs have been removed, and 
to add them back.
"""
import sys
import os
import re

def main():
	argv = sys.argv
	if len(argv) < 2:
		print(f"Usage: {argv[0]} unformatted_traceback.txt", file=sys.stderr)
		exit(1)

	if not os.path.isfile(argv[1]):
		print(f"{argv[1]} is not a file", file=sys.stderr)
		exit(1)

	with open(argv[1], 'r') as f:
		tb_txt = f.read()

	tb_header = "Traceback (most recent call last):"
	s = f"{os.linesep}{os.linesep}{tb_header}\n".join(format_one_tb(t) for t in tb_txt.split(tb_header))
	print(s, file=sys.stdout)

file_re = re.compile(r' File "[^"]+", line [0-9]+, in [^ ]+ ')

def format_one_tb(tb: str) -> str:
	file_lines = file_re.split(tb)[1:]
	file_expr = file_re.findall(tb)

	return os.linesep.join(e + "\n\t" + l for e,l in zip(file_expr, file_lines))


if __name__ == '__main__':
	main()