Python somo la 27: polymorphism kwneye python

Polymorphism in Python

Polymorphism ni mojawapo ya nguzo kuu za Object-Oriented Programming (OOP). Neno hili linatoka katika maneno ya Kigiriki "poly" (nyingi) na "morph" (umbo), likimaanisha kuwa kitu kimoja kinaweza kuwa na maumbo mengi. Katika Python, polymorphism inaruhusu methods, functions, au operators kufanya kazi tofauti kulingana na muktadha.

Aina za Polymorphism:

1. Method Polymorphism:

Hii inaruhusu methods zenye jina moja kutenda kazi tofauti kwenye class mbalimbali.

2. Operator Polymorphism:

Hii inaruhusu operator moja kama + kufanya kazi tofauti kulingana na aina za data.

Polymorphism katika Methods:

Katika Python, class tofauti zinaweza kuwa na methods zenye jina moja lakini tabia tofauti.

Mfano:

class Bird:

    def intro(self):

        print("There are many types of birds.")

    def flight(self):

        print("Most birds can fly.")

class Sparrow(Bird):

    def flight(self):

        print("Sparrows can fly.")

class Ostrich(Bird):

    def flight(self):

        print("Ostriches cannot fly.")

# Objects

obj_bird = Bird()

obj_sparrow = Sparrow()

obj_ostrich = Ostrich()

obj_bird.intro()

obj_bird.flight()

obj_sparrow.intro()

obj_sparrow.flight()

obj_ostrich.intro()

obj_ostrich.flight()

Hapa, method flight() imebadilika kulingana na object inayoitwa, ingawa jina lake limebaki lilelile.

Operator Polymorphism:

Operator moja kama + inaweza kutenda kazi tofauti kulingana na data inayoshughulikiwa.

Mfano:

# Integer addition

print(10 + 20)  # Output: 30

# String concatenation

print("Hello" + " World")  # Output: Hello World

Hii inaonyesha jinsi operator moja inaweza kubadilika kulingana na aina za data.

Polymorphism katika Functions:

Unaweza kuwa na function moja inayofanya kazi kwa objects za class tofauti.

Mfano:

def make_sound(animal):

    animal.sound()

class Dog:

    def sound(self):

        print("Woof! Woof!")

class Cat:

    def sound(self):

        print("Meow!")

# Objects

dog = Dog()

cat = Cat()

make_sound(dog)

make_sound(cat)

Hii inaonyesha jinsi function make_sound() inavyoweza kufanya kazi na objects tofauti (dog na cat) zinazoshiriki method ya jina moja sound().

Umuhimu wa Polymorphism:

1. Kubadilika: Inaruhusu code kuwa rahisi kubadilishwa na kutumiwa tena.

2. Urahisi: Inapunguza ugumu wa code kwa kuruhusu matumizi ya interface moja kwa objects tofauti.

Mwisho:

Katika somo linalofuata tutakwend akujifunz akuhusu inheritance