def return_type(self):
ret = [str]
# CF units conversion packages are optional.
uc = get_units_class(should_raise=False)
if uc is not None:
ret.append(uc)
return ret
def return_type(self):
ret = [six.string_types]
# CF units conversion packages are optional.
uc = get_units_class(should_raise=False)
if uc is not None:
ret.append(uc)
return ret
def input_types(self):
# CF units conversion packages are optional.
uc = get_units_class(should_raise=False)
if uc is None:
ret = []
else:
ret = [uc]
return ret
def input_types(self):
# CF units conversion packages are optional.
uc = get_units_class(should_raise=False)
if uc is None:
ret = []
else:
ret = [uc]
return ret
