I change one variable then i equals it to 2nd variable.When i change 1st variable, second variable is changes automatically

Question

I have a variable.Then i assign variable to 2nd variable. When i change 2nd variable 1st variable is changed automatically. But i want to change 2nd variable only.

a={'a':1, 'b':2}
b=a

b.update({'x':78})

print(a,'\n===========================\n', b)

score 2 · Answer 1 · answered Jul 12 '19 at 19:45

2

So you are not creating a copy, but a reference.

Use the dictionaries .copy() method method to get a copy

a = {'a':1, 'b':2}
b = a.copy()

answered Jul 12 '19 at 19:45

Jmonsky

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thanks you so much! – Batichico Aug 13 '19 at 10:15

score 0 · Answer 2 · answered Jul 12 '19 at 20:02

0

As explained above, you did a reference and not a copy. In your case a and b have the same address in memory. Hence, update a or b is the same.

Here an explanation about the difference between these two concepts.

answered Jul 12 '19 at 20:02

damdamo

331
2
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I change one variable then i equals it to 2nd variable.When i change 1st variable, second variable is changes automatically

2 Answers2