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 пишет:
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