https://www.marcelpost.com/wiki/index.php?action=history&feed=atom&title=Python-datastructuresPython-datastructures - Revision history2026-04-27T18:31:27ZRevision history for this page on the wikiMediaWiki 1.39.17https://www.marcelpost.com/wiki/index.php?title=Python-datastructures&diff=3482&oldid=prevAdmin at 03:29, 23 December 20202020-12-23T03:29:03Z<p></p>
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"In computer science, a data structure is a data organization, management, and storage format that enables efficient access and modification. More precisely, a data structure is a collection of data values, the relationships among them, and the functions or operations that can be applied to the data."<br />
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-- source: Wikipedia<br />
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Python knows how to work with of several types of data structures without the need to import additional libraries. Sometimes you do need to import a library to provide support (e.g. json, csv, sql) but most of these are already available when you have python installed. In rare cases you may need to build or acquire a third-party library for data structure support.<br />
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In these pages we mainly look at the most common data structures in python:<br />
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{| style="background-color:#f9f9f9;" cellpadding="10" cellspacing="0" border="1"<br />
|style="background-color:#f2f2f2;"|<b>Name</b><br />
|style="background-color:#f2f2f2;"|<b>Examples</b><br />
|style="background-color:#f2f2f2;"|<b>Details</b><br />
|style="background-color:#f2f2f2;"|<b>Characteristic</b><br />
|-<br />
|[[Tuple]]<br />
|('January', 'February', 'March', 'April', 'May')<br />
(2, 3, 5, 7, 11, 13, 17, 19, 23, 29)<br />
|Once set, values cannot be changed<br />
Referenced with index<br />
|surrounded by one single open and closed parenthesis<br />
elements separated by a comma<br />
<br />
Strings are enclosed by apostrophes or quotes<br />
|-<br />
|[[python-lists|List]]<br />
|[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]<br />
['red', 'green', 'orange', 'blue']<br />
|Values can be modified, added, deleted<br />
Referenced with index<br />
|surrounded by one single open and closed square bracket<br />
elements separated by a comma<br />
<br />
Strings are enclosed by apostrophes or quotes<br />
|-<br />
|[[Dictionary]]<br />
|{'Joe':02079343, 'Alice':010534045, 'Bob':01084523}<br />
{'x':234, 'y':345, 'z':456}<br />
|Values can be modified, added, deleted<br />
Referenced with a key<br />
|surrounded by one single open and closed curly brace<br />
elements separated by a comma<br />
<br />
each element contains one key and one value<br />
<br />
key and value are separated by a colon<br />
<br />
key maybe a string or a number<br />
<br />
strings (key or value) are enclosed by quotes<br />
<br />
keys must be unique<br />
|-<br />
|[[Set]]<br />
|([1029, 1238, 7821, 4312, 2716])<br />
|Once set, values cannot be modified<br />
Set values can be added and removed<br />
<br />
Set may only contain unique values<br />
<br />
Unordered<br />
|single square brackets surrounded by single parenthesis<br />
elements separated by a comma<br />
<br />
strings are enclosed by apostrophes or quotes<br />
|-<br />
|[[json]]<br />
|[{ "first": "Joe', "hobbies": "swimming, running" }<br />
{ "first": "Carol', "hobbies": "cycling, climbing" }]<br />
<br />
|Values can be modified, added, deleted<br />
Referenced with a key<br />
|surrounded by one single open and closed curly brace (1x record)<br />
multiple records surrounded by one single square open and close bracket<br />
<br />
records surrounded by curly braces<br />
<br />
record elements separated by a comma<br />
<br />
each element contains one key and one value<br />
<br />
key and value are separated by a colon<br />
<br />
keys surrounded by double quotes<br />
<br />
strings are enclosed by apostrophes or quotes<br />
<br />
|-<br />
|[[csv]]<br />
|silver,32423,joe bloggs,"8,5",023-32425634,,,type=1,f<br />
|once set, values cannot be modified<br />
|elements separated by a comma<br />
<br />
one record per line<br />
<br />
elements enclosed by quotes if string contains a comma<br />
|}</div>Admin