python - How to fix my math class? -

this code:

class math():     def __init__(self, x, y):         self.x = x         self.y = y class pythagorus(math):     def __init__(self, x, y):         math.__init__(self, x, y)     def __str__(self):         import math         return math.sqrt(x**2+y**2)  q = pythagorus(4, 5) print(q) 

how make function out of class, if makes sense, want return result of math.sqrt(x*2+y*2), can't seem work? in advance!

you need refer self access attributes on class:

class pythagoras(math):     def __str__(self):         import math         return str(math.sqrt(self.x**2 + self.y**2)) 

a __str__ method must return string value, using __str__ little.. weird. no need override __init__ method, didn't new in it.

you may want name base class other math don't mask module (and not need import in __str__ method). best practice use camelcase names classes; math better choice.

for kind of operation, i'd use function instead:

import math  def pythagoras(x, y)     return math.sqrt(x**2 + y**2) 

at best, you'd make pythagoras method on math class:

import math  class math():     def __init__(self, x, y):         self.x, self.y = x, y      def pythagoras(self):         return math.sqrt(self.x ** 2 + self.y ** 2)