retrieve non built-in functions in python

Question

The "dir()" function in python retrieves all attributes for a class. I was wondering if there was a similar function that returns only user defined functions? Thanks!

Can you give an example of what attributes you don't want to see? — Niklas B.
– Niklas B., Commented Feb 12, 2012 at 12:50

kaiseroskilo · Accepted Answer · 2012-02-12 13:01:02Z

3

If you want to tell a builtin from a user-defined function I'd use the types module. For instance:

>>> def hello():
...     print("hi")
... 
>>> import types
>>> type(hello) is types.BuiltinFunctionType
False
>>> type(hello) is types.FunctionType
True

Then it depends on what you want to do.You could use list comprehensions to check all attributes of a class and keep only those that turn out to be true.

[ x for x in dir(yourclass) if (type(x) is types.FunctionType) ]

Hope it helps.

answered Feb 12, 2012 at 13:01

kaiseroskilo

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1 Comment

delita Over a year ago

Superb! This is perfect. tks!

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