using

$ ./traceface -i re "re.match('[', 'a')"

output: https://raylu.github.io/traceface/demo.html

alternatively,

import traceface; traceface.set_trace()
some_code()

also,

import traceface
with traceface.trace():
	some_code()

developing

https://docs.python.org/3/library/sys.html#sys.settrace
https://docs.python.org/3/reference/datamodel.html#frame-objects