How to check whether a method exists in Python? How to check whether a method exists in Python? python python

How to check whether a method exists in Python?


python methods

Check if class has such method?

hasattr(Dynamo, key) and callable(getattr(Dynamo, key))

or

hasattr(Dynamo, 'mymethod') and callable(getattr(Dynamo, 'mymethod'))

You can use self.__class__ instead of Dynamo

python methods

It's easier to ask forgiveness than to ask permission.

Don't check to see if a method exists. Don't waste a single line of code on "checking"

try:    dyn.mymethod() # How to check whether this exists or not    # Method exists and was used.  except AttributeError:    # Method does not exist; What now?

python methods

How about dir() function before getattr()?

>>> "mymethod" in dir(dyn)True

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