example of a deep copy in python
# deep copy example in python
import copy
old_list = [[1, 1, 1], [2, 2, 2], [3, 3, 3]]
new_list = copy.deepcopy(old_list)
old_list[1][0] = 'BB'
print("Old list:", old_list)
print("New list:", new_list)
# OUTPUT
Old list: [[1, 1, 1], ['BB', 2, 2], [3, 3, 3]]
New list: [[1, 1, 1], [2, 2, 2], [3, 3, 3]]copy constructor python
class Foo:
def __init__(self, orig=None):
if orig is None:
self.non_copy_constructor()
else:
self.copy_constructor(orig)
def non_copy_constructor(self):
# do the non-copy constructor stuff
def copy_constructor(self, orig):
# do the copy constructor
a=Foo() # this will call the non-copy constructor
b=Foo(a) # this will call the copy constructorCopyright © 2021 Codeinu
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