CODEWITHSUNDEEP
python
Gal Shahar
Gal Shahar

Reputation: 2785

Getting a concise version of dir()

I want to find a generic way to list a python object attributes (names and values) but in a concise way. This works pretty well when using vars(), but you can't use it if there's no __dict__; and dir() is full of uninteresting attributes.

I know that's kind of random, but PyCharm is doing something similar somehow, here's an example for the numpy ndarray object, which has no __dict__; and dir() contains 161 attributes. I tried to remove private and callable values from dir(), but still, there are dozens.

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Any idea for how PyCharm is doing it? Is there a chance they have a special treatment for numpy objects for example?

Upvotes: 3

Views: 100

Answers (1)

Davis Herring
Davis Herring

Reputation: 39798

For classes defined in Python, you can use __dict__ (if any) on the object plus __slots__ on its type (if any). For built-in types in CPython, you might also want to search the class’s dictionary for objects of type types.GetSetDescriptorType, types.MemberDescriptorType, and/or types.DynamicClassAttribute. This misses most things that have __names__, though it can still be useful to filter the ones that remain.

Upvotes: 1

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