python instanceof code example

Example 1: isistance exmaple

#Working of isinstance() with Native Types
numbers = [1, 2, 3]

result = isinstance(numbers, list)
print(numbers,'instance of list?', result)

result = isinstance(numbers, dict)
print(numbers,'instance of dict?', result)

result = isinstance(numbers, (dict, list))
print(numbers,'instance of dict or list?', result)

number = 5

result = isinstance(number, list)
print(number,'instance of list?', result)

result = isinstance(number, int)
print(number,'instance of int?', result)



# Result

[1, 2, 3] instance of list? True
[1, 2, 3] instance of dict? False
[1, 2, 3] instance of dict or list? True
5 instance of list? False
5 instance of int? True

Example 2: isinstance python

isinstance(object, classinfo)

# if classinfo is a tuple of type objects (or recursively, other such tuples), return True
# if object is an instance of any of the types. If classinfo is not a type or tuple of types
# and such tuples, a TypeError exception is raised.

Example 3: isinstance several variables

'check if variables days, months or years are all integers
if not all(isinstance(i, int) for i in [days, months, years]):

Example 4: instance method in python

# Instance Method Example in Python 
class Student:
    
    def __init__(self, a, b):
        self.a = a
        self.b = b 
    
    def avg(self):
        return (self.a + self.b) / 2

s1 = Student(10, 20)
print( s1.avg() )

Example 5: isinstance python 3 not running

isinstance(object, classinfo)