How do I list all the attributes of an object in python pdb?

Question

I try to list all the attributes of an object in Python pdb.

Let's say I want to list all the attributes and all methods of sys.stderr.

How can I do that?

score 68 · Accepted Answer · edited Oct 26 '11 at 16:58

68

For pdb, you should be able to do p dir(a).

edited Oct 26 '11 at 16:58

sorin

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answered Oct 26 '11 at 16:41

Dan Breen

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I doesn't work in pdb, it works in python shell, but not in pdb. – sorin Oct 26 '11 at 16:42
In my case I try to run this on `sys.stdout` and if fails with and exception from `file` object. – sorin Oct 26 '11 at 16:56
Is there a way to list everything in one column? Kind of like `ls -l` or `ls -1` in bash. – hobbes3 Apr 12 '13 at 04:10
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@hobbes3 that would be `pp dir(a)` – vxsx Jan 28 '15 at 09:59
@vxsx Don't you need to import pprint for that? https://docs.python.org/2/library/pprint.html – AlxVallejo Dec 10 '17 at 17:53

score 9 · Answer 2 · answered Oct 26 '11 at 16:40

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If a is your object, use dir(a) to get a list of its symbols. See the documentation about the dir function for more information.

answered Oct 26 '11 at 16:40

hochl

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both `print dir(a)` and `dir(a)` work in *my* `pdb`. What version of Python are you using? – hochl Oct 27 '11 at 10:57
Problem already solved, but I'm using Python 2.5 on Windows. Maybe on newer versions print works by default. – sorin Oct 27 '11 at 11:37

score 7 · Answer 3 · answered Jun 09 '17 at 07:12

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print dir(object_name) will list all the attributes of object for you.

answered Jun 09 '17 at 07:12

Aamish Baloch

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score 4 · Answer 4 · answered Aug 29 '14 at 15:02

pdb is like a python shell, what you can do in pdb is what you can do in Python (except maybe some very exotic stuff)

You can set variables, call functions, ...

dir is the right function to call. It should work on any objects as it can either default to the builtin or be implemented but I have indeed seen objects on which it fails. I guess it has to do with "old" python code (in my failing case : the suds library)

Usually __dict__ can be of some help too on the pdb debugger

How do I list all the attributes of an object in python pdb?

4 Answers4