5 ms·

import datetime, time def foo2(): def foo(a=datetime.datetime.now()): time.sleep(1) return a return foo() for n in range(10): print foo

• herge 12y ago
  You are technically correct, the best type of correct. The top level function is evaluated at module load time.
• marcosdumay 12y ago
  Kilink's comment apply again. If you define several functions at different times, the default argument will be evaluated each time you define a new function. You'll have the same behaviour if you keep reassigning lambdas at the same function name, or if you keep edditing the globals. You are misunderstanding how dynamic Python is. And, yes, the part about "module load time" was a simplification.