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Python Introducing Lists Using Lists Mutability

Posted by Haben Gebremeskel
Haben Gebremeskel
589 Points

Using Python(3) in terminal in Visual Studio Code ---> .copy() will not work but [:] will

Just sharing something I encountered let me know if you guys had the same problem and solution

1 Answer

KRIS NIKOLAISEN
KRIS NIKOLAISEN
54,971 Points

What is your full version of Python. It looks like copy() is available starting with version 3.3.

From my Visual Studio Code terminal (2.7.15 vs. 3.8.1)

kris$ python
Python 2.7.15 (default, Aug 22 2018, 16:36:18) 
[GCC 4.2.1 Compatible Apple LLVM 9.1.0 (clang-902.0.39.2)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> i = ["a","b","c"]
>>> j = i.copy()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'list' object has no attribute 'copy'
>>> j = i[:]
>>> print(j)
['a', 'b', 'c']
>>> 
kris$ python3
Python 3.8.1 (v3.8.1:1b293b6006, Dec 18 2019, 14:08:53) 
[Clang 6.0 (clang-600.0.57)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> i = ["a","b","c"]
>>> j = i.copy()
>>> print(j)
['a', 'b', 'c']