51 lines
1.3 KiB
Python
51 lines
1.3 KiB
Python
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# New decorator: @traced
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#
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# PLEASE NOTE:
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# This is not a required subject!
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# You don't need to understand how this works.
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# Just use the module as a service to trace the execution of functions.
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#
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# Decorator @traced modifies the function so that an execution trace is shown.
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# jmr@ua.pt 2016-10-14 (v2)
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# 2017-12-03: Name changed from trace -> traced
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def traced(func):
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def tracedfunc(*args, **kwargs):
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if traced.indent != None:
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indent = traced.indent # save current indentation
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traced.indent += u"\u2502 "
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print(u"{}{}{!r}{!r}".format(indent, func.__name__, args, kwargs))
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try:
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r = func(*args, **kwargs) # CALL the func!
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return r
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except Exception as e:
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r = e
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raise e
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finally:
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if traced.indent != None:
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print(u"{}\u2514>{!r}".format(indent, r))
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traced.indent = indent # restore indentation
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return tracedfunc
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# Initial tracing prefix:
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traced.indent = ""
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# Uncomment to turn off tracing by default:
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#traced.indent = None
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#traced.indent = traced.__dict__.get("indent")
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if __name__ == "__main__":
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# How to use this module:
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from traced import traced
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@traced
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def func(x):
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return x*x
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func(3)
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