Traceback parser that opens the last file mentioned in the traceback.

traceback_collector.py

import sys
import re
import subprocess
from functools import partial

class TracebackParser(object):
    traceback_line_re = re.compile(r'\s+File\s+\"([^"]*)\"')
    
    def __init__(self, on_traceback=None):
        self.in_traceback = False
        self.traceback = []
        self.on_traceback = on_traceback or (lambda tb: None)

    def parse_line(self, line):
        if not line:
            return

        if self.in_traceback:
            if line[:2] != ' ' * 2:
                self.in_traceback = False
                self.on_traceback(self.traceback)
                return
           
            match = self.traceback_line_re.match(line)

            if match:
                self.traceback.append(match.group(1))
        else:
            if 'Traceback' in line:
                self.in_traceback = True

    def parse_file(self, tb_file):
        while True:
            line = tb_file.readline()
            self.parse_line(line)

def open_trace_back(app, tb):
    subprocess.check_call(['open', '-a', app, tb[-1]])

if __name__ == '__main__':
    def print_last(tb):
        print 'last:' + tb[-1]

    TracebackParser(partial(open_trace_back, sys.argv[1])).parse_file(sys.stdin)