The assignment statement (= operator) in Python does not duplicate objects. Instead, it establishes a link between the existing object and the variable name. In Python, we must use the copy module to make multiple copies of an object. Furthermore, there are two methods for producing duplicates of a given object using the copy module – Python Course in Nanded

A bit-wise copy of an object is referred to as a shallow copy. The values in the copied object are an identical replica of the values in the original object. If any of the values is a reference to another object, just its reference addresses are copied. 

Deep Copy recursively copies all values from the source to the target object, i.e. it duplicates the objects referenced. Python Classes in Nanded

To make a copy of an object in Python, use the = operator. You would suppose that this produces a new object, but it does not. It just generates a new variable that shares the old object's reference. Consider the following example: we establish a list called old_list and use the = operator to provide an object reference to new_list.

There are various methods for copying an object, the most popular of which is using a copy constructor or cloning. Copying is done primarily so that the copy may be edited or relocated, or so that the present value can be retained. If neither of these are required, a reference to the original data is adequate and more efficient because no copying takes place. Python Training in Nanded