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# encoding: utf-8

"""A fancy version of Python's builtin :func:`dir` function.

"""

#-----------------------------------------------------------------------------

# Copyright (C) 2008-2011 The IPython Development Team

#

# Distributed under the terms of the BSD License. The full license is in

# the file COPYING, distributed as part of this software.

#-----------------------------------------------------------------------------

#-----------------------------------------------------------------------------

# Imports

#-----------------------------------------------------------------------------

#-----------------------------------------------------------------------------

# Code

#-----------------------------------------------------------------------------

def get_class_members(cls):

ret = dir(cls)

if hasattr(cls, '__bases__'):

try:

bases = cls.__bases__

except AttributeError:

# `obj` lied to hasattr (e.g. Pyro), ignore

pass

else:

for base in bases:

ret.extend(get_class_members(base))

return ret

def dir2(obj):

"""dir2(obj) -> list of strings

Extended version of the Python builtin dir(), which does a few extra

checks, and supports common objects with unusual internals that confuse

dir(), such as Traits and PyCrust.

This version is guaranteed to return only a list of true strings, whereas

dir() returns anything that objects inject into themselves, even if they

are later not really valid for attribute access (many extension libraries

have such bugs).

"""

# Start building the attribute list via dir(), and then complete it

# with a few extra special-purpose calls.

words = set(dir(obj))

if hasattr(obj, '__class__'):

#words.add('__class__')

words |= set(get_class_members(obj.__class__))

# for objects with Enthought's traits, add trait_names() list

# for PyCrust-style, add _getAttributeNames() magic method list

for attr in ('trait_names', '_getAttributeNames'):

if hasattr(obj, attr):

try:

func = getattr(obj, attr)

if callable(func):

words |= set(func())

except:

# TypeError: obj is class not instance

pass

# filter out non-string attributes which may be stuffed by dir() calls

# and poor coding in third-party modules

words = [w for w in words if isinstance(w, basestring)]

return sorted(words)