Python list Data Type

Python list is a mutable ordered collection of items:

>>> symbols = ['AAPL', 'MSFT', 'NVDA']
>>> type(symbols)
<class 'list'>

The items can be of different types:

>>> various_things = ['AAPL', 123, False, None, 'NVDA']
>>> type(various_things)
<class 'list'>

There can be duplicates (this is main difference from set):

>>> with_duplicates = ['AAPL', 'MSFT', 'AAPL']
>>> type(with_duplicates)
<class 'list'>

Main difference between list and tuple is that list is mutable = can be modified later:

>>> symbols = ['AAPL', 'MSFT', 'NVDA']
>>> symbols
['AAPL', 'MSFT', 'NVDA']
>>> symbols[1] = 'XOM'
>>> symbols
['AAPL', 'XOM', 'NVDA']