Python Class instance object has no attribute 'undefined_method'
Question:
Class definition
class Car:
amount_cars = 0
def __init__(self, manufacturer, model, hp):
self.manufacturer = manufacturer
self.model = model
self.hp = hp
Car.amount_cars += 1
def print_car_amount(self):
print("Amount: {}".format(Car.amount_cars))
Creating instance
myCar1 = Car("Tesla", "Model X", 525)
Printing instance
myCar1.print_info()
Output:
---------------------------------------------------------------------------
AttributeError Traceback (most recent call last)
Input In [37], in <cell line: 1>()
----> 1 myCar1.print_info()
AttributeError: 'Car' object has no attribute 'print_info
Need help in finding the error
Answers:
As it is stated in the error message, tou have no method by the name print_info. Probably, you’re trying to do:
myCar1.print_car_amount()
class Car:
amount_cars = 0
def __init__(self, manufacturer, model, hp):
self.manufacturer = manufacturer
self.model = model
self.hp = hp
Car.amount_cars += 1
def print_info(self): # Changed
print("Amount: {}".format(Car.amount_cars))
Class definition
class Car:
amount_cars = 0
def __init__(self, manufacturer, model, hp):
self.manufacturer = manufacturer
self.model = model
self.hp = hp
Car.amount_cars += 1
def print_car_amount(self):
print("Amount: {}".format(Car.amount_cars))
Creating instance
myCar1 = Car("Tesla", "Model X", 525)
Printing instance
myCar1.print_info()
Output:
---------------------------------------------------------------------------
AttributeError Traceback (most recent call last)
Input In [37], in <cell line: 1>()
----> 1 myCar1.print_info()
AttributeError: 'Car' object has no attribute 'print_info
Need help in finding the error
As it is stated in the error message, tou have no method by the name print_info. Probably, you’re trying to do:
myCar1.print_car_amount()
class Car:
amount_cars = 0
def __init__(self, manufacturer, model, hp):
self.manufacturer = manufacturer
self.model = model
self.hp = hp
Car.amount_cars += 1
def print_info(self): # Changed
print("Amount: {}".format(Car.amount_cars))