old_contents: """
  Routines for obtaining the class names
  of an object and its parent classes.
  """
  
  from __future__ import absolute_import, unicode_literals
  
  import warnings
  
  import jaraco.itertools
  
  def ensure_sequence(el):
  	"""
  	*Deprecated*
  
  	if item is not a sequence, return the item as a singleton in a list
  
  	>>> ensure_sequence(3)
  	[3]
  	>>> ensure_sequence([3,4])
  	[3, 4]
  	"""
  	msg = "Deprecated. Use jaraco.itertools.always_iterable"
  	warnings.warn(msg, DeprecationWarning)
  	return list(jaraco.itertools.always_iterable(el))
  
  def all_bases(c):
  	"""
  	return a tuple of all base classes the class c has as a parent.
  	>>> object in all_bases(list)
  	True
  	"""
  	return c.mro()[1:]
  
  def all_classes(c):
  	"""
  	return a tuple of all classes to which c belongs
  	>>> list in all_classes(list)
  	True
  	"""
  	return c.mro()
  
  # borrowed from http://code.activestate.com/recipes/576949-find-all-subclasses-of-a-given-class/
  def itersubclasses(cls, _seen=None):
  	"""
  	itersubclasses(cls)
  
  	Generator over all subclasses of a given class, in depth-first order.
  
  	>>> bool in list(itersubclasses(int))
  	True
  	>>> class A(object): pass
  	>>> class B(A): pass
  	>>> class C(A): pass
  	>>> class D(B,C): pass
  	>>> class E(D): pass
  	>>>
  	>>> for cls in itersubclasses(A):
  	...		print(cls.__name__)
  	B
  	D
  	E
  	C
  	>>> # get ALL (new-style) classes currently defined
  	>>> res = [cls.__name__ for cls in itersubclasses(object)]
  	>>> 'type' in res
  	True
  	>>> 'tuple' in res
  	True
  	>>> len(res) > 100
  	True
  	"""
  
  	if not isinstance(cls, type):
  		raise TypeError('itersubclasses must be called with '
  			'new-style classes, not %.100r' % cls)
  	if _seen is None: _seen = set()
  	try:
  		subs = cls.__subclasses__()
  	except TypeError:  # fails only when cls is type
  		subs = cls.__subclasses__(cls)
  	for sub in subs:
  		if sub in _seen:
  			continue
  		_seen.add(sub)
  		yield sub
  		for sub in itersubclasses(sub, _seen):
  			yield sub
  
new_contents: """
  Routines for obtaining the class names
  of an object and its parent classes.
  """
  
  from __future__ import unicode_literals
  
  def all_bases(c):
  	"""
  	return a tuple of all base classes the class c has as a parent.
  	>>> object in all_bases(list)
  	True
  	"""
  	return c.mro()[1:]
  
  def all_classes(c):
  	"""
  	return a tuple of all classes to which c belongs
  	>>> list in all_classes(list)
  	True
  	"""
  	return c.mro()
  
  # borrowed from http://code.activestate.com/recipes/576949-find-all-subclasses-of-a-given-class/
  def iter_subclasses(cls, _seen=None):
  	"""
  	Generator over all subclasses of a given class, in depth-first order.
  
  	>>> bool in list(itersubclasses(int))
  	True
  	>>> class A(object): pass
  	>>> class B(A): pass
  	>>> class C(A): pass
  	>>> class D(B,C): pass
  	>>> class E(D): pass
  	>>>
  	>>> for cls in itersubclasses(A):
  	...		print(cls.__name__)
  	B
  	D
  	E
  	C
  	>>> # get ALL (new-style) classes currently defined
  	>>> res = [cls.__name__ for cls in itersubclasses(object)]
  	>>> 'type' in res
  	True
  	>>> 'tuple' in res
  	True
  	>>> len(res) > 100
  	True
  	"""
  
  	if not isinstance(cls, type):
  		raise TypeError('itersubclasses must be called with '
  			'new-style classes, not %.100r' % cls)
  	if _seen is None: _seen = set()
  	try:
  		subs = cls.__subclasses__()
  	except TypeError:  # fails only when cls is type
  		subs = cls.__subclasses__(cls)
  	for sub in subs:
  		if sub in _seen:
  			continue
  		_seen.add(sub)
  		yield sub
  		for sub in itersubclasses(sub, _seen):
  			yield sub
  
subject: Remove deprecated function. Rename for consistency.