Python Note: The mystery of assigning a variable to a variable

For example, like this. Numerical values and character strings produce the expected results.

####Numerical value####
num = 1
ber = num
num += 1
print(num)  # 2
print(ber)  # 1

te = "a"
xt = te
te += "b"
print(te)  # ab
print(xt)  # a

But with an array,

li = [1,2]
st = li
print(li)  # [1,2,3,4]
print(st)  # [1,2,3,4]

** If you update one, the other is also updated, so you can see that they are the same object. ** ** So what the above st = li means is that the object named li can now also be referenced by the name` `st. It's just that (I don't know if you need to do that).

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