log stack

import traceback

def log_stack():
  with open('/var/tmp/stacktraces.log', 'a') as f:
    f.write("-" * 80 + "\n")
    f.write("\n".join(repr(s) for s in traceback.extract_stack()
                      if s[0].find('virtualenv') == -1
                      and s[0].find('System') == -1
                      and s[2].find('wrapped') == -1
                      and s[2].find('decorated_function') == -1
                      ))
    f.write("\n")