How can I instantiate a class from a python module that I imported with py.importl​ib.import_​module?

I have the following python class saved in a module named vehicleClass.py:

class Vehicle:
    @staticmethod
    def myMethod():
        return 3
    def __init__(self, brand, model, type):
        self.brand = brand
        self.model = model
        self.type = type
        self.gas_tank_size = 14
        self.fuel_level = 0

    def fuel_up(self):
        self.fuel_level = self.gas_tank_size
        print('Gas tank is now full.')

In MATLAB, I then import the module using:

>> vMod = py.importlib.import_module('vehicleClass')

I have tried using tab-complete to figure out how to instantiate my class in MATLAB but I can't find the constructor. How can I do this?

Answer 1

[MathWorks Support Team]

If you decide to import your module this way, you can use the feval method to instantiate your class. In this case, you can instantiate your class using:

>> myVehicle = vMod.Vehicle.feval("a","b","c")
myVehicle = 

  Python Vehicle with properties:

            model: [1×1 py.str]
       fuel_level: [1×1 py.int]
    gas_tank_size: [1×1 py.int]
             type: [1×1 py.str]
            brand: [1×1 py.str]

    <vehicleClass.Vehicle object at 0x000001CB2EFC61F0>

Alternatively, you can instantiate your class using:

>> myVehicle = py.vehicleClass.Vehicle("a","b","c")

myVehicle = 

  Python Vehicle with properties:

            model: [1×1 py.str]
       fuel_level: [1×1 py.int]
    gas_tank_size: [1×1 py.int]
             type: [1×1 py.str]
            brand: [1×1 py.str]

    <vehicleClass.Vehicle object at 0x000002AB6FF3BF10>

With this method, you do not have to import your module using py.importlib.import_module(...).