def create_from_description(description):
"""
Instantiate a new object from a description.
Args:
description (dict):
A description of the object.
Returns:
A new instance of the described object
"""
if isinstance(description, dict):
if '@type' in description:
name = description['@type']
for describable in get_inheritors(Describable):
if describable.__name__ == name:
return describable.__new_from_description__(description)
raise TypeError('No describable class "{}" found!'.format(name))
else:
return {k: create_from_description(v)
for k, v in description.items()}
elif (isinstance(description, (bool, float, type(None))) or
isinstance(description, six.integer_types) or
isinstance(description, six.string_types)):
return description
elif isinstance(description, list):
return [create_from_description(d) for d in description]
raise TypeError('Invalid description of type {}'.format(type(description)))
def get_layer_class_from_typename(typename):
layer_classes = get_inheritors(Layer)
for layer_class in layer_classes:
if typename == layer_class.__name__:
return layer_class
else:
raise TypeError("Layer-type '{}' unknown!".format(typename))
def get_layer_class_from_typename(typename):
layer_classes = get_inheritors(Layer)
for layer_class in layer_classes:
if typename == layer_class.__name__:
return layer_class
else:
raise TypeError("Layer-type '{}' unknown!".format(typename))
def test_get_inheritors():
class A(object):
pass
class B(A):
pass
class C(B):
pass
class D(A):
pass
class E(object):
pass
assert get_inheritors(A) == {B, C, D}
def test_get_inheritors():
class A(object):
pass
class B(A):
pass
class C(B):
pass
class D(A):
pass
class E(object):
pass
assert get_inheritors(A) == {B, C, D}