Babban matsalar tare da __sub__ shine za'a iya amfani dashi don ƙirƙirar subtype wanda bai dace da nau'in asali ba.
def __sub__(self, other):
"""Subtract two vectors."""
if len(self) != len(other):
raise ValueError("Cannot subtract vectors of different lengths.")
return Vector([x - y for x, y in zip(self, other)])
Wannan ita ce ma'anar ma'anar ma'aikacin ragi don abu na Vector. Idan sassan biyun da ake cirewa ba tsayi ɗaya ba ne, zai ɗaga Ƙimar Kuskure. In ba haka ba, za ta dawo da wani sabon abu na Vector wanda abubuwan da ke tattare da shi shine bambancin ma'auni na daidaitattun abubuwan shigar guda biyu.
_sub_, kai sauran gardama
A cikin Python, ƙaramar hujja ita ce hujja wacce wani bangare ne na wata hujja. Misali, a cikin lambar da ke gaba, hujja ta farko (x) ita ce ƙaramar hujja ta biyu (y):
x = 5
yi = 10
A wannan yanayin, x da y dukkansu ƙananan mahawara ce ta hujja ta uku (z).
Misalin Aji
A Python, azuzuwan misalai ne na aji. Ajin samfuri ne don ƙirƙirar abubuwa. Kuna ƙirƙiri misali na aji ta amfani da ajin keyword wanda sunan ajin ya biyo baya. Misali, don ƙirƙirar misali na ajin MyClass, zaku yi amfani da bayanin mai zuwa:
myclass = Myclass ()
Hakanan zaka iya ƙirƙirar misali na aji ta amfani da aikin ginin da aka ayyana a cikin ajin. Aikin ginin yana ɗaukar hujja ɗaya, wanda shine sunan abin da kuke son ƙirƙirar. Misali, don ƙirƙirar misali na ajin MyClass da kiran aikin ginin sa, zaku yi amfani da bayanin mai zuwa:
myclass = MyClass (suna = "John")
Hanyar sihiri
Babu amsa daya-daya-daidai-duk ga wannan tambayar, saboda hanya mafi kyau ta kusanci hanyar sihiri a Python zata bambanta dangane da takamaiman bukatunku. Koyaya, wasu nasihu kan yadda ake amfani da hanyar sihiri a Python sun haɗa da amfani da shi don sarrafa ayyuka masu wahala ko don aiwatar da hadaddun ayyuka cikin sauri da sauƙi. Bugu da ƙari, koyaushe tabbatar da cewa kun fahimci yuwuwar haɗarin da ke tattare da amfani da hanyar sihiri, saboda yana iya zama haɗari idan ba a yi amfani da shi daidai ba.
