Python Set copy() | Method

Python Set copy() method is used to copy the set but it’s a shallow copy. That means if we modify something in the copied set, changes are not reflected back in the original set.

set.copy()

Use “=” to copy a set, and modify the copied set, the changes are also reflected in the original set.

Set copy Python

Simple example code copy set and Add items to the set after copy.

n = {1, 2, 3, 4}
cn = n.copy()

# add 5 to the copied set
cn.add(5)

print('numbers: ', n)
print('new: ', cn)

Output:

Copy Set using = operator

n = {1, 2, 3, 4}
cn = n


# add 5 to the copied set
cn.add(5)

print('numbers: ', n)
print('new: ', cn)

Output:

numbers:  {1, 2, 3, 4, 5}
new:  {1, 2, 3, 4, 5}

Do comment if you have any doubts or suggestions on this Python set method topic.

Note: IDE: PyCharm 2021.3.3 (Community Edition)

Windows 10

Python 3.10.1

All Python Examples are in Python 3, so Maybe its different from python 2 or upgraded versions.