CODEWITHSUNDEEP
pythonmultiple-inheritance
Ayush Bherwani
Ayush Bherwani

Reputation: 2719

TypeError: __init__() takes 4 positional arguments but 7 were given

class Employee(object):
    def __init__(self,ename,salary,dateOfJoining):
        self.ename=ename
        self.salary=salary
        self.dateOfJoining=dateOfJoining
    def output(self):
        print("Ename: ",self.ename,"\nSalary: ",self.salary,"\nDate Of 
Joining: ",self.dateOfJoining)
class Qualification(object):
    def __init__(self,university,degree,passingYear):
        self.university=university
        self.degree=degree
        self.passingYear=passingYear
    def qoutput(self):
        print("Passed out fom University:",self.university,"\nDegree:",self.degree,"\Passout year: ",self.passingYear)
class Scientist(Employee,Qualification):
    def __int__(self,ename,salary,dateOfJoining,university,degree,passingYear):
        Employee.__init__(self,ename,salary,dateOfJoining)
        Qualification.__init__(self,university,degree,passingYear)
    def soutput(self):
        Employee.output()
        Qualification.output()
a=Scientist('Ayush',20000,'21-04-2010','MIT','B.Tech','31-3-2008')
a.soutput()

I'm not able to get a solution to the problem and I'm not able to understand why this TpyeError has occured. I'm new to python. Thanks

Upvotes: 0

Views: 5212

Answers (2)

catsock
catsock

Reputation: 1851

Your Scientist class constructor is misspelled as __int__ instead of __init__. Since there is no overridden constructor to be used from the Scientist class, it goes up a level on the inheritance chain and uses the Employee's constructor, which in fact only uses 4 positional arguments. Just fix the typo and it should work.

(there are a few other bad things you're doing with classes in your code, but I'll allow other people to comment with tips)

Upvotes: 1

Rohi
Rohi

Reputation: 814

Your scientist class has the init function written as :

def __int__

instead of 

def __init__

So what happened is it inherited the init function from its parent class, which receives less params then you sent to the class.

Also instead of calling the init of the parents you should be using the super function.

super(PARENT_CLASS_NAME, self).__init__()

This obviously goes for all parent functions.

Upvotes: 5

Related Questions