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function tracing decorator

Author:
amitu
Posted:
March 20, 2009
Language:
Python
Version:
1.0
Tags:
decorator debugging tracing
Score:
0 (after 0 ratings)

This is a decorator that logs function arguments, return object and time taken for execution as well as any exception that might have been raised by the function.

Useful for debug logging. 

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# traced # {{{ 
def traced(func):
    def wrapper(*args, **kw):
        start = time.time()
        e = None
        try:
            ret = func(*args, **kw)
        except Exception, e:
            pass
        time_taken = time.time() - start
        logger.info(
            "func=%s, func.__name__=%s, args=%s, kw=%s, return=%s, time=%s" % (
                func, func.__name__, args, kw, ret, time_taken
            )
        )
        if e:
            logger.exception(e)
            raise e
        return ret
    return wrapper
# }}}

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