def parse_timestamp(s):
	m = re.match(""" ^
	(?P<year>-?[0-9]{4}) - (?P<month>[0-9]{2}) - (?P<day>[0-9]{2})
	T (?P<hour>[0-9]{2}) : (?P<minute>[0-9]{2}) : (?P<second>[0-9]{2})
	(?P<microsecond>\.[0-9]{1,6})?
	(?P<tz>
	  Z | (?P<tz_hr>[-+][0-9]{2}) : (?P<tz_min>[0-9]{2})
	)?
	$ """, s, re.X)

	if m is not None:
		values = m.groupdict()
		
	if values["tz"] in ("Z", None):
		tz = 0
	else:
		tz = int(values["tz_hr"]) * 60 + int(values["tz_min"])
		
	if values["microsecond"] is None:
		values["microsecond"] = 0
	else:
		values["microsecond"] = values["microsecond"][1:]
		values["microsecond"] += "0" * (6 - len(values["microsecond"]))

	values = dict((k, int(v)) for k, v in list(values.items())
		if not k.startswith("tz"))
	try:
		return datetime(**values), tz
	except ValueError:
		pass
		
	return None, None
Remove an added builtin and re-set the original.
dataset/ETHPy150Open Esri/solutions-geoprocessing-toolbox/data_management/toolboxes/scripts/ImportPatrolRptXML.py/parse_timestamp--crossover with--dataset/ETHPy150Open ipython/ipython-py3k/IPython/core/builtin_trap.py/BuiltinTrap.remove_builtin