On Wed, Feb 15, 2017 at 10:18 PM, Steven D'Aprano <st...@pearwood.info> wrote: > Python doesn't have thunks, but there is a relatively heavyweight > solution for delayed evaluation: wrap the code in a function. > > debugLog( ‘info is %r’, lambda: expensiveFunction() ) > > > and then adjust debugLog so that if the argument is a function, it will > call the function only when needed: > > def debugLog(message, value): > if debug_log_enabled: > if isinstance(value, types.FunctionType): > value = value() > log(message % value)
Or use the function as the __repr__ of some object, which comes to the same thing without requiring special code inside debugLog. ChrisA _______________________________________________ Python-ideas mailing list Python-ideas@python.org https://mail.python.org/mailman/listinfo/python-ideas Code of Conduct: http://python.org/psf/codeofconduct/
