How can I instantiate a class from a python module that I imported with py.importlib.import_module?
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MathWorks Support Team
2021-4-7
回答: MathWorks Support Team
2021-4-23
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?
采纳的回答
MathWorks Support Team
2021-4-7
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(...).
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