python 3 error RuntimeError: super(): no arguments

Question

Why do I get this error? Can someone solve this problem for me? I tried to call the display function from class project in Progress.display() or anybody has other solution on how to display the users input?

And how can I input Stages class and Progress class at the same time ? thanks for the helpp

super().display()
RuntimeError: super(): no arguments

Here's the code

class Project:
    def __init__(self, name="", job="", **kwargs):
        super().__init__(**kwargs)
        self.name = name
        self.job = job

    def display():
        print("name: ", (self.name))
        print("job: ", (self.job))

    @staticmethod
    def prompt_init():
        return dict(name=input("name: "), job=input("job: "))


class Stages(Project):
    def __init__(self, stages="", **kwargs):
        super().__init__(**kwargs)
        self.stages = stages

    def display(self):
        super().display()
        print("stages: ", (self.stages))

    @staticmethod
    def prompt_init():
        parent_init = Project.prompt_init()

        choice = None
        while choice not in (1, 2, 3, 4, 5, 6):

            print("Insert your stage now: ")
            print("1. Planning")
            print("2. Analysis")
            print("3. Design")
            print("4. Implementation")
            print("5. Testing")
            print("6. Release")

            choice = input("enter your choice: ")
            choice = int(choice)

            if choice == 1:
                stages = "Planning"
            elif choice == 2:
                stages = "Analysis"
            elif choice == 3:
                stages = "Design"
            elif choice == 4:
                stages = "Implementation"
            elif choice == 5:
                stages = "Testing"
            elif choice == 6:
                stages = "Release"
            else:
                print("no such input, please try again")

            print(name)
            print(stages)


class Progress(Project):
    def __init__(self, progress="", **kwargs):
        super().__init__(**kwargs)
        self.progress = progress

    def display(self):
        super().display()
        print("progress: ", (self.progress))

    @staticmethod
    def prompt_init():
        parent_init = Project.prompt_init()

        choice = None
        while choice not in (1, 2, 3, 4):

            print("1. 25%")
            print("2. 50%")
            print("3. 75%")
            print("4. 100%")

            choice = input("enter your choice[1-4]: ")
            choice = int(choice)

            if choice == 1:
                progress = "25%"
            elif choice == 2:
                progress = "50%"
            elif choice == 3:
                progress = "75%"
            elif choice == 4:
                progress = "100%"
            else:
                print("no such input, please try again")

            print(progress)
        parent_init.update({"progress": progress})
        return parent_init


class A(Stages, Progress):
    def prompt_init():
        init = Stages.prompt_init()
        init.update(Progress.prompt_init())
        return init

    prompt_init = staticmethod(prompt_init)


class New:
    type_map = {("stages", "progress"): A}

    def add_project_test(self, name, job, stages):
        init_args = Project.prompt_init()
        self.project_list.append(Project(**init_args))

    def __init__(self):
        self.project_list = []

    def display_project():
        for project in self.project_list:
            project.display()
            print()

    def add_progress(self):
        init_args = Progress.prompt_init()
        self.project_list.append(Progress(**init_args))

    def add_project(self):
        ProjectClass = self.type_map[A]
        init_args = ProjectClass.prompt_init()
        self.property_list.append(ProjectClass(**init_args))


my_list = New()
my_list.add_progress()
my_list.display_project()

Answer 1

Not 100% solution to the question, but same error. Posted with love for Googlers who have the same issue as me.

Using Python 3, I got this error because I forgot to include self in the method. Simple thing, but sometimes the most simple things trip you up when you're tired.

class foo(object):
    def bar(*args):
        super().bar(*args)

=> RuntimeError: super(): no arguments

Remember to include your self

class foo(object):
    def bar(self, *args):
        super().bar(*args)

Answer 2

Not really an answer for this question, but I got this same error when trying to call super while in a pdb shell and ended up going down a rabbit hole trying to figure it out. You need to add the parent class you want to call super on and self to the call in order for it to run - super(<ParentClass>, self) - in pdb. Or at least just know that super won't work as expected in pdb. I didn't really need to call it there, but it blocked me from figuring out why something else wasn't working.

Answer 3

Every time you use super() in a method, you need to be in an instance method or a class method. Your staticmethods don't know what their superclasses are. Observe:

class Funky:
    def groove(self):
        print("Smooth")

    @staticmethod
    def fail():
        print("Ouch!")

    @classmethod
    def wail(cls):
        print("Whee!")


class Donkey(Funky):
    def groove(self):
        print(super())

    @staticmethod
    def fail():
        try:
            print(super())
        except RuntimeError as e:
            print("Oh no! There was a problem with super!")
            print(e)

    @classmethod
    def wail(cls):
        print(super())


a_donkey = Donkey()
a_donkey.groove()
a_donkey.fail()
a_donkey.wail()

Outputs:

<super: <class 'Donkey'>, <Donkey object>>
Oh no! There was a problem with super!
super(): no arguments
<super: <class 'Donkey'>, <Donkey object>>

Here's your code, debugged and with some extra functionality and tests:

class Project:
    def __init__(self, name="", job="", **kwargs):
        super().__init__(**kwargs)
        self.name = name
        self.job = job

    def display(self):
        print("name: ", self.name)
        print("job: ", self.job)

    @staticmethod
    def prompt_init():
        return dict(name=input("name: "), job=input("job: "))


class Progress(Project):
    def __init__(self, progress="", **kwargs):
        super().__init__(**kwargs)
        self.progress = progress

    def display(self):
        super().display()
        print("progress: ", self.progress)

    @staticmethod
    def prompt_init():
        parent_init = Project.prompt_init()
        progress = input("your progress: ")
        parent_init.update({
            "progress": progress
        })
        return parent_init


class New:
    def __init__(self):
        self.project_list = []

    def display_project(self):
        for project in self.project_list:
            project.display()
            print()

    def add_project(self):
        init_args = Project.prompt_init()
        self.project_list.append(Project(**init_args))

    def add_progress(self):
        init_args = Progress.prompt_init()
        self.project_list.append(Progress(**init_args))


my_list = New()
my_list.add_project()
my_list.add_progress()
my_list.display_project()

Answer 4

You might not have to use super() at all, just reference the super class directly. For example, I was writing a Django test like this one, but in my case the AnimalTestCase was inheriting a ParentTestCase. I wanted the fixture property in AnimalTestCase to use all the same fixtures in ParentTestCase, and add a couple more. But calling super() never worked. In the end, I realized that I could reference ParentTestCase as it was.

fixtures = ParentTestCase.fixtures + ['more']

class ParentTestCase(TestCase):
    fixtures = ['bacteria', 'fungus', 'stalagtites', 'stalagmites']

    def setUp(self):
        # Test definitions as before.
        call_setup_methods()


class AnimalTestCase(ParentTestCase):
    fixtures = ParentTestCase.fixtures + ['vertebrata', 'invertebrate']

    def test_fluffy_animals(self):
        # A test that uses the fixtures.
        call_some_test_code()