python super() function error?

Question

class car(object):

    def __init__(self, make, model, year):
        self.make = make
        self.model = model
        self.year = year
        self.odometer_reading = 0

class electricCar(car):
    def __init__(self, make, model, year):
        super().__init__(make, model, year)

tesla = electricCar('tesla', 'model s', 2016)
print tesla.get_descriptive_name()

TypeError: super() takes at least 1 argument (0 given)

what is the problem with the super() function ?

replace `super()` by the name of your superclass, i. e. `car`. Or if you want `super`, `super(electricCar, self).__init__(make, model, year)` — AdrienW, Jul 29 '16 at 08:11
What version of Python are you using? You can see the `super()` syntax in [official docs](https://docs.python.org/2/library/functions.html#super) . For Python 2 you need to specify the child class name as the type argument. For Python3 you don't — RedBaron, Jul 29 '16 at 08:11
If you are just learning the language... why are you starting with a python version that is *6 years old*? Just start with the newest versions. Python2 should be used only by people who need it for backwards compatibility with old systems/libraries. — Bakuriu, Jul 29 '16 at 08:37

score 8 · Accepted Answer · edited May 23 '17 at 12:01

8

super() (without arguments) was introduced in python3 Here is python2 implementation.

class electricCar(car):
    def __init__(self, make, model, year):
        super(electricCar,self).__init__(make, model, year)

you could refer this question for general inheritance syntax issue regarding python2 and python3

edited May 23 '17 at 12:01

Community

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answered Jul 29 '16 at 08:12

mehari

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score 3 · Answer 2 · answered Jul 29 '16 at 08:13

3

It looks like you are trying to use the Python 3 syntax, but you are using Python 2. In that version you need to pass the current class and instance as arguments to the super function:

super(electricCar, self).__init__(make, model, year)

answered Jul 29 '16 at 08:13

Daniel Roseman

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Thank you everyone for helping ! – npkp Jul 29 '16 at 08:42

Projesh Bhoumik · Answer 3 · 2017-08-15T14:27:50.887

0

If you are using python 2 you need to pass your instance explicitly with the super method. In python 3 or higher, instance variable are passed implicitly you don't need to specify it. Here self is an instance of the class car

super(car, self).__init__(make, model, year)

edited Aug 15 '17 at 14:27

answered Aug 15 '17 at 14:04

Projesh Bhoumik

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python super() function error?

3 Answers3