[Python-ideas] Dynamic code NOPing

[Andrew Grigorev]

It is possible now, use just have to move a resource consuming 
operations to the __str__ or __repr__ class methods and use logging.log 
feature, that it doesn't format string with specified format and 
arguments if the logging level is greater than the specified message 
level. For example:

class Factorial:
     def __init__(self, n):
         self.n  = n
     def calculate(self):
         return factorial(n)
     def __str__(self):
         return str(self.calculate)

logging.debug("Factorial of %d is %s", 2**15, Factorial(2**15))

25.12.2012 12:28, anatoly techtonik ?????:
> For the logging module it will be extremely useful if Python included 
> a way to disactivate processing certain blocks to avoid making 
> sacrifices between extensive logging harness and performance. For 
> example, instead of writing:
>
> if log.DEBUG==True:
>   log(factorial(2**15))
>
> It should be possible to just write:
>   log(factorial(2**15))
>
> if if log() is an instance of some Nopable class, the statement in 
> log's braces is not executed.
> -- 
> anatoly t.
>
>
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-- 
Andrew

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