isfunc#

isfunc(obj)[source]#

Quickly check if something is a function.

This checks whether or not something is a method (types.MethodType) or a function (types.FunctionType), which is different to whether or not it is callable (e.g., classes are callable).

Note: Python doesn’t have a crystal-clear distinction between things that are and aren’t functions, so there may be some edge cases with this function. For example, dict.fromkeys is a builtin_function_or_method, which returns True. So is list().pop and list().remove. But list.pop and list.remove are different types, and return False. The full list of types it checks against is:

  • types.FunctionType

  • types.MethodType

  • types.BuiltinFunctionType

  • types.BuiltinMethodType

  • types.LambdaType

  • functools.partial

  • staticmethod

  • classmethod

Example:

sc.isfunc(list) # Returns False
callable(list) # Returns True
New in version 3.2.0.
New in version 3.2.3: also checks for partial and lambda functions
On this page