The copy() method of deque class in Python

Method Name:

copy

copy

The copy() method of deque class in python returns copy of a deque object.
The returned deque object is a new object where as the elements present in the new deque object are just copied from the original deque. ie., elements are shallow copied
The example below verifies the shallow copying process of the copy() method by printing the ids of the deque objects the elements present in them.

Copying of a deque

import collections

t1 = (1,2,3,4,5)

d1 = collections.deque(t1)

d2 = d1.copy()

print("d1 contents:")

print(d1)

print("d2 id:")

print(id(d1))

print("d2 contents:")

print(d2)

print("d2 id:")

print(id(d2))

print("checking the first element of d1 and d2 are shallow copies:")

print(id(d1[0]))

print(id(d2[0]))

d1 contents:

deque([1, 2, 3, 4, 5])

d2 id:

4300761504

d2 contents:

deque([1, 2, 3, 4, 5])

d2 id:

4301821744

checking the first element of d1 and d2 are shallow copies:

4297623936