Can someone explain this to me please?

Question

a = b = [1]
c, d = [1], [1]
print(a is b)
print(c is d)

Output: True False

Thank you!

Answer 1

a and b are pointing to one value, c and d have each their own value. is checks, whether both variables reffer to one value, or not. Try using id() to understand:
a = b = [1]
print(id(a))
print(id(b))
# Prints the same id.
print(a == b)
# Returns true, bcs values are same

Answer 2

Here 'is' is telling if both a, b are pointing to same list....
In first case a, b is pointing to Same list but c, d are 2 different lists with same value

Answer 3

Thanks for help! It was really useful!

Answer 4

check this out by HonFu https://code.sololearn.com/ceg91PiC9O0H/?ref=app

Answer 5

https://www.sololearn.com/Discuss/2072312/?ref=app