Not able to call a function using the python inheritance?

Question

I am new to python, please help me with the below question-

Question: You have already given a class base, now you have to declare a class called code which inherits the class base and calls the hello of the base class.

Example:

Input: 4
Output: ["Hello Python", "Hello Python", "Hello Python", "Hello Python"]

class base:
    def __init__(self,n):
        self.n=n
    def hello(n):
        return ["Hello Python" for i in range(n)]

I tried as below:

class code(base):
    def __init__(self):
        base.__init__(self,5)
x=code()
x.hello()

but got error:

TypeError                                 Traceback (most recent call last)
<ipython-input-88-1a7429b02c84> in <module>
     12         base.__init__(self,5)
     13 x=code()
---> 14 x.hello()

<ipython-input-88-1a7429b02c84> in hello(n)
      3      self.n=n
      4     def hello(n):
----> 5         return ["Hello Python" for i in range(n)]
      6 
      7 

TypeError: 'code' object cannot be interpreted as an integer

@Dolendra Ningthemcha are you able to change the `base` class? — Richie Bendall, Dec 16 '19 at 03:03
If it wasn't clear, `def hello(n)` is non-standard and arguably wrong. If it's supposed to be a bound method, it should take `self` as a parameter. If it's supposed to be an unbound method, it should be decorated with `@staticmethod`. — wjandrea, Dec 16 '19 at 04:05

eroot163pi · Answer 1 · 2019-12-16T03:56:52.860

About the error:

base.hello is unbound method.

x.hello() is translated to code.hello(x) and range function takes in int type variables. This makes it clear why it is giving TypeError: 'code' object cannot be interpreted as an integer. Now for solution

There are two ways to make this work

1)So to make this work without changing base class:

class code(base):
    def __init__(self):
        base.__init__(self,5)
x = code()
code.hello(x.n)

2) Or change the method type(bound method):

class base:
    def __init__(self,n):
        self.n=n
    def hello(self):
        return ["Hello Python" for i in range(self.n)]

For more clarity on bound, unbound, static methods Bound, unbound and static method

For more on class, static, instance methods, refer to Python method types in classes

Not able to call a function using the python inheritance?

1 Answers1