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Title: enhanced dir?
Type: enhancement Stage: patch review
Components: Versions: Python 3.11
Status: open Resolution:
Dependencies: Superseder:
Assigned To: Nosy List: JelleZijlstra, apostofes
Priority: normal Keywords: patch

Created on 2022-04-07 22:21 by apostofes, last changed 2022-04-11 14:59 by admin.

Pull Requests
URL Status Linked Edit
PR 32408 closed apostofes, 2022-04-07 22:47
Messages (4)
msg416948 - (view) Author: apostofes (apostofes) * Date: 2022-04-07 22:21
current dir gives output like this,
from collection import OrderedDict
od = OrderedDict({'a': 1, 'b': 2, 'c': 3})
['__class__', '__contains__', '__delattr__', '__delitem__', '__dict__',
 '__dir__', '__doc__', '__eq__', '__format__', '__ge__', '__getattribute__',
 '__getitem__', '__gt__', '__hash__', '__init__', '__init_subclass__',
 '__iter__', '__le__', '__len__', '__lt__', '__ne__', '__new__', '__reduce__',
 '__reduce_ex__', '__repr__', '__reversed__', '__setattr__', '__setitem__',
 '__sizeof__', '__str__', '__subclasshook__', 'clear', 'copy', 'fromkeys',
 'get', 'items', 'keys', 'move_to_end', 'pop', 'popitem', 'setdefault',
 'update', 'values']
but wouldn't it be better if the output was like this,

{'OrderedDict': {'__contains__', '__delitem__', '__dir__', '__eq__',
                  '__format__', '__ge__', '__getitem__', '__gt__', '__init__', '__init_subclass__',
                  '__iter__', '__le__', '__lt__', '__ne__', '__reduce__', '__reduce_ex__',
                  '__repr__', '__reversed__', '__setitem__', '__sizeof__', '__subclasshook__',
                  'clear', 'copy', 'fromkeys', 'get', 'items', 'keys', 'move_to_end', 'pop',
                  'popitem', 'setdefault', 'update', 'values'},
'dict': {'__getattribute__', '__len__', '__new__'},
'object': {'__delattr__', '__setattr__', '__str__'}}
msg416951 - (view) Author: Jelle Zijlstra (JelleZijlstra) * (Python committer) Date: 2022-04-07 23:55
This would be nice, but backward compatibility alone means we can't change dir() to return a dictionary. What you propose would make more sense as a new function, perhaps in a package like pydoc or a third-party tool like IPython.
msg416954 - (view) Author: apostofes (apostofes) * Date: 2022-04-08 00:30
would adding an argument to dir be a possible solution,
l = [1, 2, 3]
dir(l, categorize=True)
msg416955 - (view) Author: apostofes (apostofes) * Date: 2022-04-08 01:33
plus I would want it to have some more methods,
l = [1, 2, 3]
using enhanced dir should give,
{'list': {'__add__', '__contains__', '__delitem__', '__eq__', '__ge__',
         '__getattribute__', '__getitem__', '__gt__', '__iadd__', '__imul__',
         '__init__', '__init_subclass__', '__iter__', '__le__', '__len__',
         '__lt__', '__mul__', '__ne__', '__new__', '__repr__',
         '__reversed__', '__rmul__', '__setitem__', '__sizeof__',
         '__subclasshook__', 'append', 'clear', 'copy', 'count', 'extend',
         'index', 'insert', 'pop', 'remove', 'reverse', 'sort'},
'object': {'__delattr__', '__dir__', '__format__', '__reduce__', '__reduce_ex__', '__setattr__', '__str__'}}
obtained from, (here only printing, made a dictionary in the implementation in the PR)
for j in dir(l):
this check fails for,
{'list': {'__doc__', '__hash__', '__class__'}}
I would also want these,
{'list': {'__instancecheck__','__subclasscheck__', '__subclasses__', 'mro'},
 'type': {'__call__', '__prepare__'}}
which were obtained from,
for j in set(dir(type(l))) - set(dir(l)):

and it fails for,
{'list': {'__abstractmethods__', '__base__', '__bases__', '__basicsize__', '__dict__', '__dictoffset__',
           '__flags__', '__itemsize__', '__module__', '__mro__',
           '__name__', '__qualname__', '__text_signature__', '__weakrefoffset__'}
Date User Action Args
2022-04-11 14:59:58adminsetgithub: 91410
2022-04-08 01:33:59apostofessetmessages: + msg416955
2022-04-08 00:30:53apostofessetmessages: + msg416954
2022-04-07 23:55:13JelleZijlstrasetnosy: + JelleZijlstra
messages: + msg416951
2022-04-07 22:47:11apostofessetkeywords: + patch
stage: patch review
pull_requests: + pull_request30433
2022-04-07 22:21:22apostofescreate