28 lines
877 B
Org Mode
Executable File
28 lines
877 B
Org Mode
Executable File
:PROPERTIES:
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:ID: 3a41407c-661e-416a-80d2-4c7a137d153a
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:END:
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#+title: python-set
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#+filetags: :python:notes:
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Sets are used to store multiple items in a single variable.
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Set is one of 4 built-in data types in Python used to store collections of data, the other 3 are List, Tuple, and Dictionary, all with different qualities and usage.
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A set is a collection which is unordered, unchangeable*, and unindexed.
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*Note: Set items are unchangeable, but you can remove items and add new items.
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Sets are written with curly brackets.
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Example:
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#+begin_src python
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# Create a Set:
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thisset = {"apple", "banana", "cherry"}
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print(thisset)
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#+end_src
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Notes:
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Sets are fast, Note that empty Set cannot be created through {}, it creates a dictionary, unless you include values.
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set is implemented as a hash table, so you can expect lookup, insert, delete to be O(1) on average.
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