private variables in python

Question

Can anyone pls explain what are single undescore and double underscore variables and how they can be accessed outside of any class?

Answer 1

You can access them just by writing them with the underscores:

print(yourInstance._thatValue)

Python has no privacy. It relies on the convention that programmers *voluntarily* don't touch members that start with _.

Answer 2

Single Underscore:
> In Interpreter
>> After a name
>> Before a name
**

*** Double Underscore:

__leading_double_underscore

__before_after__

Answer 3

if we want to calculate how much money we will have on the 5th day, we can use this expression: 0.01*(2**5) = 0.32 dollars (multiply the penny by 2 raised to the power of 5).

Answer 4

For everyone saying <variable> = None is declaration without initialization, you are wrong. The assignment operator = is there, meaning something is being assigned to the variable, which defines the variable type and initializes it, even if the thing to be assigned was of a None type.

Answer 5

Variable with leading "_" single underscore is just a convention to tell that this variable shall not be imported. You can say it's a soft rule(Rules are meant to be broken XD)

Variable with leading '__' double underscore is to tell the interpreter that this variable is not shared and is local to only single class. It's also called name mangling.

Answer 6

To declare private variable as __var
And to access this variable as instance name._classname__var

Answer 7

If you use a variable with a singel underscore than it is called weakly private, but if you use a variable with doublekunderscore than it is called strongly pirvate

Answer 8

I do not understand the question!

Answer 9

Single underscore is private

Answer 10

Privacy doesn't exist in python but you can use conventions like Double underscore for private, if you use a single underscore it means current class

Answer 11

I can not

Answer 12

Op

Answer 13

ㅤㅤ

Answer 14

Yes, is possible.

Answer 15

a single underscore at starting is less private and a double underscore at starting is more private

Answer 16

Hi