def required_attributes(cls):
"""
Figures out which attributes, if any, were declared as
RequiredAttribute instances.
:returns: Dictionary. The keys in this dictionary are the names of the
attributes that are required. For each attribute, the value either
`None` or a type object.
"""
required_attributes = {}
for clazz in extract_classes(cls):
for key,value in clazz.__dict__.items():
if isinstance(value, cls.RequiredAttribute):
required_attributes[key] = value.required_type
return required_attributes
def required_attributes(cls):
"""
Figures out which attributes, if any, were declared as
RequiredAttribute instances.
:returns: Dictionary. The keys in this dictionary are the names of the
attributes that are required. For each attribute, the value either
`None` or a type object.
"""
required_attributes = {}
for clazz in extract_classes(cls):
for key, value in clazz.__dict__.items():
if isinstance(value, cls.RequiredAttribute):
required_attributes[key] = value.required_type
return required_attributes
def extract_classes(clazz):
"""
Find all parent classes, anywhere in the inheritance tree.
:param clazz: class, the thing to crawl through
Returns a list of all base classes in the inheritance tree
"""
extracted = [clazz]
for base in clazz.__bases__:
extracted += extract_classes(base)
# no need to include 'object'
if object in extracted:
extracted.remove(object)
return dedupe_list(extracted, preserve_order=True)
def extract_classes(clazz):
"""
Find all parent classes, anywhere in the inheritance tree.
:param clazz: class, the thing to crawl through
Returns a list of all base classes in the inheritance tree
"""
extracted = [clazz]
for base in clazz.__bases__:
extracted += extract_classes(base)
# no need to include 'object'
if object in extracted:
extracted.remove(object)
return dedupe_list(extracted, preserve_order=True)