CODEWITHSUNDEEP
pythonpython-3.x
koki
koki

Reputation: 93

How can I keep both the first and last names in l?

How can I save bill gates and mark zuckerberg in lis?

When I write to the sedond, the first is lost

class student:
    def __init__(self,name,surname):
        self.name=name
        self.surname=surname
    def studen(self):
        lis=[]
        lis.extend([self.name,self.surname])
        return lis

a=student("Bill","gates")
a=student("Mark","zuckerberg")
print(a.studen())

result:

['Mark', 'zuckerberg']

i want:

['Mark', 'zuckerberg', 'bill', 'gates']

Upvotes: 1

Views: 54

Answers (2)

Reblochon Masque
Reblochon Masque

Reputation: 36702

You probably need a class Student, and a class Students to represent a collection of Student:

Maybe something like this:

class Student:

    def __init__(self, name, surname):
        self.name = name
        self.surname = surname

    def __str__(self):
        return f'{self.name}, {self.surname}'

    def __repr__(self):
        return str(self)


class Students:

    def __init__(self, seq):
        self._students = seq[:]

    def append(self, student):
        self._students.append(student)

    def __str__(self):
        return '\n'.join(str(student) for student in self._students)


if __name__ == '__main__':

    bill = Student("Bill", "Gates")
    mark = Student("Mark", "Zuckerberg")
    students = Students([mark, bill])
    print(students)

output:

Mark, Zuckerberg
Bill, Gates

You could also subclass list, or some base class from the collections module; More simply, you also could use a plain python list to hold your instances of Student:

class Student:

    def __init__(self, name, surname):
        self.name = name
        self.surname = surname

    def __str__(self):
        return f'{self.name} {self.surname}'

    def __repr__(self):
        return str(self)


if __name__ == '__main__':

    bill = Student("Bill", "Gates")
    mark = Student("Mark", "Zuckerberg")
    students = [mark, bill]
    print(students)

output:

[Mark Zuckerberg, Bill Gates]

Upvotes: 1

Austin
Austin

Reputation: 26039

Make lis an instance attribute. The way you do overrides instance a, so the previous value is lost.

You can do:

class student:
    def __init__(self,name,surname):
        self.name = name
        self.surname = surname
        self.lis = [self.name, self.surname]
    def studen(self):
        return self.lis

a = student("Bill", "gates")
b = student("Mark", "zuckerberg")
print(a.studen() + b.studen())
# ['Bill', 'gates', 'Mark', 'zuckerberg']

Upvotes: 1

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