Magic/Dunder Methods in Python | Python Tutorial - Day #73

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[ankushsingh]

Quick Quiz Answer
class shop:
def __init__(self, sales, expenditure):
self.sales=sales
self.expenditure=expenditure
def __call__(self):
print(F"The total profit is
shop1=shop(15000, 12000)
shop1()
Output:
The total profit is 3000

[i_am_dumb]

I have never been this consistent with my learning enjoying every minute of this course

[technomusiccloud]

quickquiz answer🔥🔥🔥

__call__ can be used in a same fasion as help() like to descripe an object and its properties in a readable format

[irfanmohammad]

I think the practicle use case of def__call__(self ) : method will be to add conclusion to a class or it can used to find total amount at the end of class

[ahsantariq]

Call method can be used to use a class instance like a function. We can give arguments and executes it however we want

[swatidixit]

Reached #day 73 and realllyy enjoying each day and gaining knowledge :) Harry sir you are

[theankitsagarit]

Very good and informative content.... This is the most user friendly and learner friendly tutorial channel. Harry bhai 9999 kilo shukriya...

[probalkar]

Harry bhai plz start a machine learning ultimate course too from beginner to advanced really need it 🙏🏼🙏🏼

[sanjeevthakur]

call function practical use might be to check the functions in the element

[rahmansherif]

QUICK QUIZ ANSWER:
class calculator:
def __init__(self, base):
self.base = base

def __call__(self, x):
return self.base + x

c = calculator(10)
print(c(5))

[mohankilari]

bro we can actually use the printing of length of name by print(len(e.name))

[mehmoodahmed]

__call__() Method is used to make the instance of class object callable.

class Callable:
def __call__(self):
return "Instance is Callable"

instance = Callable()
print(callable(instance)) #return True if callable
instance() #calling the instance

[arpankarmakar]

Quick Quiz: Harry sir in the short time I only found this little application of the __call__ under method:

import random
import string


class Employee:
def __init__(self, name) -> None:
self.name = name

def __call__(self, *args, **kwargs): # this makes the instance callable
self.id = "".join(
random.choices(self.name + string.ascii_letters + string.digits, k=6)
)
print(f"The Employee's ID: {self.id}")


e = Employee("Arpan")
e()

# The dunder/magic method __call__ here, prints the Employee's randomly generated 6 character ID

[HuzaifaKhan-iyqj]

Harry bhi, you've unnecessarily complicated this lecture, and I needed to understand it from Jenny's lecture.

[regulusblack]

I think the practical use case of def__call__(self ) : is to add a definition or conclusion of a class which can easily be obtained

[sasticoaching]

Prctical use case might be to use the class as an argument to The Function like it may return a list which can be used as a argument in a funcion

[veersinghchauhan]

At 7:45 why is it executing only the str method and not the repr method . Even though we have not called either of them while typing print(e). Can anyone help 🙏

[AbdulHadi-qqhp]

But sir, we can print the len of name like :
# Coding :
class Employee:
name = "harry"
# def __len__(self):
# i = 0
# for c in self.name:
# i += 1
# return i

e = Employee()
print(e.name)
# print(len(e))

print(len(e.name))

[LogicOfComputerScience]

Harry bhaiya, I request you... Aap please apne interpreter ka size bada rakha kare. Or console ko small size me rakhe take dekhne me or samajh ne aasani ho...

Thank for teach us.

[saradasarawagi]

10:40 to know don't of the major details of class or every object of class or get the information of class