chutney-for-relay-testing/lib/chutney/Debug.py

#!/usr/bin/env python2
#
# Copyright 2011 Nick Mathewson, Michael Stone
# Copyright 2013 The Tor Project
#
#  You may do anything with this work that copyright law would normally
#  restrict, so long as you retain the above notice(s) and this license
#  in all redistributed copies and derived works.  There is no warranty.

from __future__ import print_function

import cgitb
import os

# Get verbose tracebacks, so we can diagnose better.
cgitb.enable(format="plain")


# Set debug_flag=True in order to debug this program or to get hints
# about what's going wrong in your system.
debug_flag = os.environ.get("CHUTNEY_DEBUG", "") != ""

def debug(s):
    "Print a debug message on stdout if debug_flag is True."
    if debug_flag:
        print("DEBUG: %s" % s)