Two lines of code. Same variable. Same operator. Completely different behavior. a = [1, 2, 3] b =...
Two lines of code. Same variable. Same operator. Completely different behavior.
a = [1, 2, 3]
b = a
b += [4] # line A
print(a) # [1, 2, 3, 4]
It almost looks as if Python somehow 'links' variables together. But that's not what's happening.
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