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import inspect
def is_invalid_params(func, *args, **kwargs):
"""
Method:
Validate pre-defined criteria, if any is True - function is invalid
0. func should be callable
1. kwargs should not have unexpected keywords
2. remove kwargs.keys from func.parameters
3. number of args should be <= remaining func.parameters
4. number of args should be >= remaining func.parameters less default
"""
# For builtin functions inspect.getargspec(funct) return error. If builtin
# function generates TypeError, it is because of wrong parameters.
if not inspect.isfunction(func):
return True
signature = inspect.signature(func)
parameters = signature.parameters
unexpected = set(kwargs.keys()) - set(parameters.keys())
if len(unexpected) > 0:
return True
params = [
parameter for name, parameter in parameters.items()
if name not in kwargs
]
params_required = [
param for param in params
if param.default is param.empty
]
return not (len(params_required) <= len(args) <= len(params))
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