Why assignment in python is dynamic??

Question

hi,
consider below:

a=[1,2,3]
b=a
a[0]="test"
print(b)

output is:
>>>["test",2,3]

why the value of "b" changed dynamically with the change in variable "a"??

this a bit awkward if you are coming from C language background

Answer 1

It's the same thing in C, with nothing to do with dynamicity. You are assigning the reference of a to b. The variable b refers to the same object as a. Coming from a C background shouldn't make this look any awkward. Instead, it should make more sense. Read into the differences between shallow copy and deep copy.

https://stackoverflow.com/questions/184710/what-is-the-difference-between-a-deep-copy-and-a-shallow-copy

Answer 2

Mugahed Izzeldin Osman Simpler than it sounds. :>

https://code.sololearn.com/coU1gFS69ytS/?ref=app

Answer 3

nice, thanks Fermi , I guess the right question is how to perform deep copy with python?? :)