trace_calls.py

def trace_calls():
    import inspect, sys, traceback

    def tracer(frame, event, arg):
        if event == 'call':
            lineno = frame.f_lineno
            co = frame.f_code
            filename = co.co_filename
            name = co.co_name
            if filename.startswith(sys.prefix):
                return
            summary = traceback.FrameSummary(filename, lineno, name, lookup_line=False, locals=frame.f_locals)
            for i in traceback.format_list([summary]):
                bb.warn(i)

    sys.setprofile(tracer)