Python Language Tuple: Difference between revisions
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* [[Python_Language#Tuple|Python Language]] | * [[Python_Language#Tuple|Python Language]] | ||
=Overview= | =Overview= | ||
A tuple is a immutable [[Python_Language#Sequence_Types|sequence type]] that contains zero or more elements and whose elements can be of different types. Once a tuple is defined, you can't add, delete or change items. A tuple is similar to a constant [[Python Language List#Overview|list]], and could be used instead of a list, if we can afford the "list" to be immutable. Naturally, the list's mutating functions <code>append()</code>, <code>insert()</code> do not exist on tuples. There are several advantages of using a tuple instead of a list: a tuple uses less space than a list and they cannot be mutated by mistake. | A tuple is a immutable [[Python_Language#Sequence_Types|sequence type]] that contains zero or more elements and whose elements can be of different types. Once a tuple is defined, you can't add, delete or change items. A tuple is similar to a constant [[Python Language List#Overview|list]], and could be used instead of a list, if we can afford the "list" to be immutable. Naturally, the list's mutating functions <code>append()</code>, <code>insert()</code> do not exist on tuples. There are several advantages of using a tuple instead of a list: a tuple uses less space than a list and they cannot be mutated by mistake. Positional function arguments can be [[Python_Language_Functions#Gather_Positional_Arguments_with_.2A|grouped together and provided as a tuple]] in the function body (<code>*args</code>). | ||
=Declaration= | =Declaration= | ||
Revision as of 05:02, 20 January 2022
Internal
Overview
A tuple is a immutable sequence type that contains zero or more elements and whose elements can be of different types. Once a tuple is defined, you can't add, delete or change items. A tuple is similar to a constant list, and could be used instead of a list, if we can afford the "list" to be immutable. Naturally, the list's mutating functions append(), insert() do not exist on tuples. There are several advantages of using a tuple instead of a list: a tuple uses less space than a list and they cannot be mutated by mistake. Positional function arguments can be grouped together and provided as a tuple in the function body (*args).
Declaration
Conversion from other Data Structures
Tuple Unpacking
Exchanging Variable Values
Tuples can be used to exchange to variable values without using a third temporary variable.
Named Tuples
Named tuples can be a simple alternative to objects.