import inspect def getargspec(func): sig = inspect.signature(func) args = [ p.name for p in sig.parameters.values() if p.kind == inspect.Parameter.POSITIONAL_OR_KEYWORD ] varargs = [ p.name for p in sig.parameters.values() if p.kind == inspect.Parameter.VAR_POSITIONAL ] varargs = varargs[0] if varargs else None varkw = [ p.name for p in sig.parameters.values() if p.kind == inspect.Parameter.VAR_KEYWORD ] varkw = varkw[0] if varkw else None defaults = [ p.default for p in sig.parameters.values() if p.kind == inspect.Parameter.POSITIONAL_OR_KEYWORD and p.default is not p.empty ] or None return args, varargs, varkw, defaults def get_func_args(func): sig = inspect.signature(func) return [ arg_name for arg_name, param in sig.parameters.items() if param.kind == inspect.Parameter.POSITIONAL_OR_KEYWORD ] def get_func_full_args(func): """ Return a list of (argument name, default value) tuples. If the argument does not have a default value, omit it in the tuple. Arguments such as *args and **kwargs are also included. """ sig = inspect.signature(func) args = [] for arg_name, param in sig.parameters.items(): name = arg_name # Ignore 'self' if name == 'self': continue if param.kind == inspect.Parameter.VAR_POSITIONAL: name = '*' + name elif param.kind == inspect.Parameter.VAR_KEYWORD: name = '**' + name if param.default != inspect.Parameter.empty: args.append((name, param.default)) else: args.append((name,)) return args def func_accepts_kwargs(func): return any( p for p in inspect.signature(func).parameters.values() if p.kind == p.VAR_KEYWORD ) def func_accepts_var_args(func): """ Return True if function 'func' accepts positional arguments *args. """ return any( p for p in inspect.signature(func).parameters.values() if p.kind == p.VAR_POSITIONAL ) def func_has_no_args(func): args = [ p for p in inspect.signature(func).parameters.values() if p.kind == p.POSITIONAL_OR_KEYWORD ] return len(args) == 1 def func_supports_parameter(func, parameter): return parameter in inspect.signature(func).parameters