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?

Solution 1

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

Solution 2

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.

Solution 3

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

Solution 4

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

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Comments

[sorin]

I doesn't work in pdb, it works in python shell, but not in pdb.

[sorin]

In my case I try to run this on sys.stdout and if fails with and exception from file object.

[hochl]

both print dir(a) and dir(a) work in my pdb. What version of Python are you using?

[sorin]

Problem already solved, but I'm using Python 2.5 on Windows. Maybe on newer versions print works by default.

[hobbes3]

Is there a way to list everything in one column? Kind of like ls -l or ls -1 in bash.

[vxsx]

@hobbes3 that would be pp dir(a)

[AlxVallejo]

@vxsx Don't you need to import pprint for that? docs.python.org/2/library/pprint.html