def duck_type_collection(specimen, default=None):
" does the same thing as the sqla function, but handles proxy dict "
guess = sqla_duck_type_collection(specimen, default=None)
if guess is not None:
return guess
isa = isinstance(specimen, type) and issubclass or isinstance
if isa(specimen, _AssociationDict):
return dict
return default
def duck_type_collection(specimen, default=None):
" does the same thing as the sqla function, but handles proxy dict "
guess = sqla_duck_type_collection(specimen, default=None)
if guess is not None:
return guess
isa = isinstance(specimen, type) and issubclass or isinstance
if isa(specimen, _AssociationDict):
return dict
return default
self.func = func
self.args = args
self.kwargs = kwargs
def populate(self):
data = self.func(*self.args, **self.kwargs)
if not isinstance(data, dict):
raise Exception('function did not return a dict')
self.update(data)
self.initialized = True
def __getitem__(self, key):
if not self.initialized:
self.populate()
return dict.__getitem__(self, key)
def get(self, key, default=None):
if not self.initialized:
self.populate()
return dict.get(self, key, default)
if __name__ == '__main__':
items = [
_AssociationList,
_AssociationDict,
_AssociationSet,
]
for item in items:
print(sqla_duck_type_collection(item), duck_type_collection(item))
self.initialized = False
self.func = func
self.args = args
self.kwargs = kwargs
def populate(self):
data = self.func(*self.args, **self.kwargs)
if not isinstance(data, dict):
raise Exception('function did not return a dict')
self.update(data)
self.initialized = True
def __getitem__(self, key):
if not self.initialized:
self.populate()
return dict.__getitem__(self, key)
def get(self, key, default=None):
if not self.initialized:
self.populate()
return dict.get(self, key, default)
if __name__ == '__main__':
items = [
_AssociationList,
_AssociationDict,
_AssociationSet,
]
for item in items:
print (sqla_duck_type_collection(item), duck_type_collection(item))
