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import importlib
class CondFunc:
def __new__(cls, orig_func, sub_func, cond_func):
self = super(CondFunc, cls).__new__(cls)
if isinstance(orig_func, str):
func_path = orig_func.split('.')
for i in range(len(func_path)-1, -1, -1):
try:
resolved_obj = importlib.import_module('.'.join(func_path[:i]))
break
except ImportError:
pass
for attr_name in func_path[i:-1]:
resolved_obj = getattr(resolved_obj, attr_name)
orig_func = getattr(resolved_obj, func_path[-1])
setattr(resolved_obj, func_path[-1], lambda *args, **kwargs: self(*args, **kwargs))
self.__init__(orig_func, sub_func, cond_func)
return lambda *args, **kwargs: self(*args, **kwargs)
def __init__(self, orig_func, sub_func, cond_func):
self.__orig_func = orig_func
self.__sub_func = sub_func
self.__cond_func = cond_func
def __call__(self, *args, **kwargs):
if not self.__cond_func or self.__cond_func(self.__orig_func, *args, **kwargs):
return self.__sub_func(self.__orig_func, *args, **kwargs)
else:
return self.__orig_func(*args, **kwargs)
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