Problem Situation

• I was trying to make a copy of the original document using a deep copy to create test code, but after importing the copy module and proudly using the copy() method, I ended up struggling with why it wasn’t making a deep copy. -> Solution: Import the copy module as before, but use deepcopy from the copy module to solve the problem.

Shallow Copy vs. Deep Copy

• Since there are many ways to make a shallow copy, I will explain deep copying first.

Deep Copy

Method

• copy.deepcopy(data)

Principle

• Assign the original to a different memory location

Shallow Copy

Methods

• Assignment (=)
• [:] slicing
• object.copy
• copy.copy

Principle

• Assignment (=): A method in which another copy variable points to the same memory address where the original’s information is stored (the address values are the same)

• Slicing, object.copy, copy.copy:

References: https://blockdmask.tistory.com/576