I am trying to create a dictionary of class names residing in module to their constructor args.
Constructor args should also be a dictionary where I will store the default values of the arguments wherever defined.
Any leads will be really helpful. Thanks in advance.
To provide more details about the use case, What I am trying to do here is for all the classes mentioned in the image image
I want to get the constructor parameters for e.g. please refer below image image
If I understand you correctly, you just want the name of the parameters in the signature of your __init__.
That is actually quite simple using the inspect module:
Modern python answer:
import inspect
signature = inspect.signature(your_class.__init__).parameters
for name, parameter in signature.items():
print(name, parameter.default, parameter.annotation, parameter.kind)
Outdated answer
import inspect
signature = inspect.getargspec(your_class.__init__)
signature.args # All arguments explicitly named in the __init__ function
signature.defaults # Tuple containing all default arguments
signature.varargs # Name of the parameter that can take *args (or None)
signature.keywords # Name of the parameter that can take **kwargs (or None)
You can map the default arguments to the corresponding argument names like this:
argument_defaults = zip(signature.args[::-1], signature.defaults[::-1])
getargspec has been deprecated since 3.0. For 2/3 compat code getfullargspec should be used, and signature() if going for modern python only.
selfis always the first parameter to the __init__ call. You can just filter it out. Otherwise I do not understand your question.
inspect.signature(your_class), without the __init__, in this case it doesn't list self.Most recently, the following works:
import inspect
signature = inspect.signature(yourclass.__init__)
for param in signature.parameters.values():
print(param)
The difference being (compared to the accepted answer), that the parameters instance variable needs to be accessed.
