Python function guts

import sys
import threading

def show_guts(f):
    sentinel = object()
    gutsdata = threading.local()
    gutsdata.captured_locals = None
    gutsdata.tracing = False

    def trace_locals(frame, event, arg):
        if event.startswith('c_'):  # C code traces, no new hook
            return 
        if event == 'call':  # start tracing only the first call
            if gutsdata.tracing:
                return None
            gutsdata.tracing = True
            return trace_locals
        if event == 'line':  # continue tracing
            return trace_locals

        # event is either exception or return, capture locals, end tracing
        gutsdata.captured_locals = frame.f_locals.copy()
        return None

    def wrapper(*args, **kw):
        # preserve existing tracer, start our trace
        old_trace = sys.gettrace()
        sys.settrace(trace_locals)

        retval = sentinel
        try:
            retval = f(*args, **kw)
        finally:
            # reinstate existing tracer, report, clean up
            sys.settrace(old_trace)
            for key, val in gutsdata.captured_locals.items():
                print '{}: {!r}'.format(key, val)
            if retval is not sentinel:
                print 'Returned: {!r}'.format(retval)
            gutsdata.captured_locals = None
            gutsdata.tracing = False

        return retval

    return wrapper

Source: stackoverflow.com

Similar codes

36 votes152 views4 answers
Print colored text to console python
Python
4 votes152 views1 answer
Check if an application is running python
Python
12 votes151 views2 answers
Presskeys in python
Python
3 votes177 views1 answer
Default argument in flask route
Python Flask
6 votes178 views4 answers
Python restart script
Python
2 votes149 views2 answers
Fibonacci sequence python 2.7
Python
1 vote156 views2 answers
Print hexadecimal in python
Python
0 vote164 views1 answer
Python-wordpress-xmlrpc get post id
Python
3 votes140 views1 answer
Python set return type
Python
-3 votes189 views1 answer
Django socketio web chat example
Python Django