fixing the site
This commit is contained in:
398
output/20250805141906-python_dictionary.html
Executable file
398
output/20250805141906-python_dictionary.html
Executable file
@@ -0,0 +1,398 @@
|
||||
<?xml version="1.0" encoding="utf-8"?>
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
|
||||
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
|
||||
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
|
||||
<head>
|
||||
<!-- 2025-12-28 Sun 20:37 -->
|
||||
<meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
|
||||
<meta name="viewport" content="width=device-width, initial-scale=1" />
|
||||
<title>python-dictionary</title>
|
||||
<meta name="generator" content="Org Mode" />
|
||||
<style type="text/css">
|
||||
#content { max-width: 60em; margin: auto; }
|
||||
.title { text-align: center;
|
||||
margin-bottom: .2em; }
|
||||
.subtitle { text-align: center;
|
||||
font-size: medium;
|
||||
font-weight: bold;
|
||||
margin-top:0; }
|
||||
.todo { font-family: monospace; color: red; }
|
||||
.done { font-family: monospace; color: green; }
|
||||
.priority { font-family: monospace; color: orange; }
|
||||
.tag { background-color: #eee; font-family: monospace;
|
||||
padding: 2px; font-size: 80%; font-weight: normal; }
|
||||
.timestamp { color: #bebebe; }
|
||||
.timestamp-kwd { color: #5f9ea0; }
|
||||
.org-right { margin-left: auto; margin-right: 0px; text-align: right; }
|
||||
.org-left { margin-left: 0px; margin-right: auto; text-align: left; }
|
||||
.org-center { margin-left: auto; margin-right: auto; text-align: center; }
|
||||
.underline { text-decoration: underline; }
|
||||
#postamble p, #preamble p { font-size: 90%; margin: .2em; }
|
||||
p.verse { margin-left: 3%; }
|
||||
pre {
|
||||
border: 1px solid #e6e6e6;
|
||||
border-radius: 3px;
|
||||
background-color: #f2f2f2;
|
||||
padding: 8pt;
|
||||
font-family: monospace;
|
||||
overflow: auto;
|
||||
margin: 1.2em;
|
||||
}
|
||||
pre.src {
|
||||
position: relative;
|
||||
overflow: auto;
|
||||
}
|
||||
pre.src:before {
|
||||
display: none;
|
||||
position: absolute;
|
||||
top: -8px;
|
||||
right: 12px;
|
||||
padding: 3px;
|
||||
color: #555;
|
||||
background-color: #f2f2f299;
|
||||
}
|
||||
pre.src:hover:before { display: inline; margin-top: 14px;}
|
||||
/* Languages per Org manual */
|
||||
pre.src-asymptote:before { content: 'Asymptote'; }
|
||||
pre.src-awk:before { content: 'Awk'; }
|
||||
pre.src-authinfo::before { content: 'Authinfo'; }
|
||||
pre.src-C:before { content: 'C'; }
|
||||
/* pre.src-C++ doesn't work in CSS */
|
||||
pre.src-clojure:before { content: 'Clojure'; }
|
||||
pre.src-css:before { content: 'CSS'; }
|
||||
pre.src-D:before { content: 'D'; }
|
||||
pre.src-ditaa:before { content: 'ditaa'; }
|
||||
pre.src-dot:before { content: 'Graphviz'; }
|
||||
pre.src-calc:before { content: 'Emacs Calc'; }
|
||||
pre.src-emacs-lisp:before { content: 'Emacs Lisp'; }
|
||||
pre.src-fortran:before { content: 'Fortran'; }
|
||||
pre.src-gnuplot:before { content: 'gnuplot'; }
|
||||
pre.src-haskell:before { content: 'Haskell'; }
|
||||
pre.src-hledger:before { content: 'hledger'; }
|
||||
pre.src-java:before { content: 'Java'; }
|
||||
pre.src-js:before { content: 'Javascript'; }
|
||||
pre.src-latex:before { content: 'LaTeX'; }
|
||||
pre.src-ledger:before { content: 'Ledger'; }
|
||||
pre.src-lisp:before { content: 'Lisp'; }
|
||||
pre.src-lilypond:before { content: 'Lilypond'; }
|
||||
pre.src-lua:before { content: 'Lua'; }
|
||||
pre.src-matlab:before { content: 'MATLAB'; }
|
||||
pre.src-mscgen:before { content: 'Mscgen'; }
|
||||
pre.src-ocaml:before { content: 'Objective Caml'; }
|
||||
pre.src-octave:before { content: 'Octave'; }
|
||||
pre.src-org:before { content: 'Org mode'; }
|
||||
pre.src-oz:before { content: 'OZ'; }
|
||||
pre.src-plantuml:before { content: 'Plantuml'; }
|
||||
pre.src-processing:before { content: 'Processing.js'; }
|
||||
pre.src-python:before { content: 'Python'; }
|
||||
pre.src-R:before { content: 'R'; }
|
||||
pre.src-ruby:before { content: 'Ruby'; }
|
||||
pre.src-sass:before { content: 'Sass'; }
|
||||
pre.src-scheme:before { content: 'Scheme'; }
|
||||
pre.src-screen:before { content: 'Gnu Screen'; }
|
||||
pre.src-sed:before { content: 'Sed'; }
|
||||
pre.src-sh:before { content: 'shell'; }
|
||||
pre.src-sql:before { content: 'SQL'; }
|
||||
pre.src-sqlite:before { content: 'SQLite'; }
|
||||
/* additional languages in org.el's org-babel-load-languages alist */
|
||||
pre.src-forth:before { content: 'Forth'; }
|
||||
pre.src-io:before { content: 'IO'; }
|
||||
pre.src-J:before { content: 'J'; }
|
||||
pre.src-makefile:before { content: 'Makefile'; }
|
||||
pre.src-maxima:before { content: 'Maxima'; }
|
||||
pre.src-perl:before { content: 'Perl'; }
|
||||
pre.src-picolisp:before { content: 'Pico Lisp'; }
|
||||
pre.src-scala:before { content: 'Scala'; }
|
||||
pre.src-shell:before { content: 'Shell Script'; }
|
||||
pre.src-ebnf2ps:before { content: 'ebfn2ps'; }
|
||||
/* additional language identifiers per "defun org-babel-execute"
|
||||
in ob-*.el */
|
||||
pre.src-cpp:before { content: 'C++'; }
|
||||
pre.src-abc:before { content: 'ABC'; }
|
||||
pre.src-coq:before { content: 'Coq'; }
|
||||
pre.src-groovy:before { content: 'Groovy'; }
|
||||
/* additional language identifiers from org-babel-shell-names in
|
||||
ob-shell.el: ob-shell is the only babel language using a lambda to put
|
||||
the execution function name together. */
|
||||
pre.src-bash:before { content: 'bash'; }
|
||||
pre.src-csh:before { content: 'csh'; }
|
||||
pre.src-ash:before { content: 'ash'; }
|
||||
pre.src-dash:before { content: 'dash'; }
|
||||
pre.src-ksh:before { content: 'ksh'; }
|
||||
pre.src-mksh:before { content: 'mksh'; }
|
||||
pre.src-posh:before { content: 'posh'; }
|
||||
/* Additional Emacs modes also supported by the LaTeX listings package */
|
||||
pre.src-ada:before { content: 'Ada'; }
|
||||
pre.src-asm:before { content: 'Assembler'; }
|
||||
pre.src-caml:before { content: 'Caml'; }
|
||||
pre.src-delphi:before { content: 'Delphi'; }
|
||||
pre.src-html:before { content: 'HTML'; }
|
||||
pre.src-idl:before { content: 'IDL'; }
|
||||
pre.src-mercury:before { content: 'Mercury'; }
|
||||
pre.src-metapost:before { content: 'MetaPost'; }
|
||||
pre.src-modula-2:before { content: 'Modula-2'; }
|
||||
pre.src-pascal:before { content: 'Pascal'; }
|
||||
pre.src-ps:before { content: 'PostScript'; }
|
||||
pre.src-prolog:before { content: 'Prolog'; }
|
||||
pre.src-simula:before { content: 'Simula'; }
|
||||
pre.src-tcl:before { content: 'tcl'; }
|
||||
pre.src-tex:before { content: 'TeX'; }
|
||||
pre.src-plain-tex:before { content: 'Plain TeX'; }
|
||||
pre.src-verilog:before { content: 'Verilog'; }
|
||||
pre.src-vhdl:before { content: 'VHDL'; }
|
||||
pre.src-xml:before { content: 'XML'; }
|
||||
pre.src-nxml:before { content: 'XML'; }
|
||||
/* add a generic configuration mode; LaTeX export needs an additional
|
||||
(add-to-list 'org-latex-listings-langs '(conf " ")) in .emacs */
|
||||
pre.src-conf:before { content: 'Configuration File'; }
|
||||
|
||||
table { border-collapse:collapse; }
|
||||
caption.t-above { caption-side: top; }
|
||||
caption.t-bottom { caption-side: bottom; }
|
||||
td, th { vertical-align:top; }
|
||||
th.org-right { text-align: center; }
|
||||
th.org-left { text-align: center; }
|
||||
th.org-center { text-align: center; }
|
||||
td.org-right { text-align: right; }
|
||||
td.org-left { text-align: left; }
|
||||
td.org-center { text-align: center; }
|
||||
dt { font-weight: bold; }
|
||||
.footpara { display: inline; }
|
||||
.footdef { margin-bottom: 1em; }
|
||||
.figure { padding: 1em; }
|
||||
.figure p { text-align: center; }
|
||||
.equation-container {
|
||||
display: table;
|
||||
text-align: center;
|
||||
width: 100%;
|
||||
}
|
||||
.equation {
|
||||
vertical-align: middle;
|
||||
}
|
||||
.equation-label {
|
||||
display: table-cell;
|
||||
text-align: right;
|
||||
vertical-align: middle;
|
||||
}
|
||||
.inlinetask {
|
||||
padding: 10px;
|
||||
border: 2px solid gray;
|
||||
margin: 10px;
|
||||
background: #ffffcc;
|
||||
}
|
||||
#org-div-home-and-up
|
||||
{ text-align: right; font-size: 70%; white-space: nowrap; }
|
||||
textarea { overflow-x: auto; }
|
||||
.linenr { font-size: smaller }
|
||||
.code-highlighted { background-color: #ffff00; }
|
||||
.org-info-js_info-navigation { border-style: none; }
|
||||
#org-info-js_console-label
|
||||
{ font-size: 10px; font-weight: bold; white-space: nowrap; }
|
||||
.org-info-js_search-highlight
|
||||
{ background-color: #ffff00; color: #000000; font-weight: bold; }
|
||||
.org-svg { }
|
||||
</style>
|
||||
|
||||
<link rel="stylesheet" href="/assets/styles/style.css" />
|
||||
<link rel="stylesheet" href="/assets/styles/bigger-picture.min.css" />
|
||||
<link rel="stylesheet" href="/assets/styles/media.css" />
|
||||
|
||||
<script src="/assets/scripts/script.js" defer></script>
|
||||
<script src="/assets/scripts/search.js" defer></script>
|
||||
<script src="/assets/scripts/bigger-picture.min.js" defer></script>
|
||||
<script src="/assets/scripts/svg-pan-zoom.min.js" defer></script>
|
||||
<script src="/assets/scripts/gallery-init.js" defer></script>
|
||||
</head>
|
||||
<body>
|
||||
<div id="preamble" class="status">
|
||||
|
||||
<div class="banner-header">
|
||||
<div class="banner-left">
|
||||
<a href="/20241210233721-brain_moc.html"> <img src="/assets/gr.png" alt="Site Logo" class="banner-logo" /> </a>
|
||||
<div id="updated">Updated: 2025-12-28 Sun 19:48</div>
|
||||
</div>
|
||||
|
||||
<div class="banner-search">
|
||||
<input id="search-box"
|
||||
type="search"
|
||||
placeholder="Search notes…"
|
||||
aria-label="Search notes"
|
||||
autocomplete="off" />
|
||||
<div id="search-results"></div>
|
||||
</div>
|
||||
|
||||
<button id="close-all">Close All</button>
|
||||
</div>
|
||||
</div>
|
||||
<div id="stack-root">
|
||||
<div class="stack-track">
|
||||
<article class="stack-pane pane-root" data-url="/20250805141906-python_dictionary.html">
|
||||
<div id="content" class="content">
|
||||
<div class="title-section">
|
||||
<div class="title-controls">
|
||||
<button class="pane-fullscreen" aria-label="Fullscreen">F</button>
|
||||
<button class="pane-edit" aria-label="Edit pane">E</button>
|
||||
<button class="pane-close" aria-label="Close pane">×</button>
|
||||
</div>
|
||||
<h1 class="title">python-dictionary</h1>
|
||||
<div class="title-metadata">
|
||||
<span class="metadata-item">
|
||||
<span class="metadata-label">planted:</span>
|
||||
<span class="metadata-value">2025-08-05</span>
|
||||
</span>
|
||||
<span class="metadata-item">
|
||||
<span class="metadata-label">last tended to:</span>
|
||||
<span class="metadata-value">2025-12-28</span>
|
||||
</span>
|
||||
</div>
|
||||
</div>
|
||||
<p>
|
||||
Dictionaries are used to store data values in key:value pairs.
|
||||
</p>
|
||||
|
||||
<p>
|
||||
A dictionary is a collection which is ordered*, changeable and do not allow duplicates.
|
||||
</p>
|
||||
|
||||
<p>
|
||||
*As of Python version 3.7, dictionaries are ordered. In Python 3.6 and earlier, dictionaries are unordered.
|
||||
</p>
|
||||
|
||||
<p>
|
||||
Dictionaries are written with curly brackets, and have keys and values:
|
||||
</p>
|
||||
|
||||
<div class="org-src-container">
|
||||
<pre class="src src-python">
|
||||
# Create and print a dictionary:
|
||||
thisdict = {
|
||||
"brand": "Ford",
|
||||
"model": "Mustang",
|
||||
"year": 1964
|
||||
}
|
||||
print(thisdict)
|
||||
|
||||
</pre>
|
||||
</div>
|
||||
|
||||
<p>
|
||||
Iterating:
|
||||
</p>
|
||||
|
||||
<p>
|
||||
Iterate through Value
|
||||
</p>
|
||||
|
||||
<p>
|
||||
To iterate through all values of a dictionary in Python using .values(), you can employ a for loop, accessing each value sequentially. This method allows you to process or display each individual value in the dictionary without explicitly referencing the corresponding keys.
|
||||
</p>
|
||||
|
||||
<p>
|
||||
Example: In this example, we are using the values() method to print all the values present in the dictionary.
|
||||
</p>
|
||||
|
||||
<div class="org-src-container">
|
||||
<pre class="src src-python">
|
||||
# create a python dictionary
|
||||
d = {"name": "Geeks", "topic": "dict", "task": "iterate"}
|
||||
|
||||
# loop over dict values
|
||||
for val in d.values():
|
||||
print(val)
|
||||
</pre>
|
||||
</div>
|
||||
|
||||
<p>
|
||||
Iterate through keys
|
||||
</p>
|
||||
|
||||
<p>
|
||||
In Python, just looping through the dictionary provides you its keys. You can also iterate keys of a dictionary using built-in `.keys()` method.
|
||||
</p>
|
||||
|
||||
<div class="org-src-container">
|
||||
<pre class="src src-python">
|
||||
# create a python dictionary
|
||||
d = {"name": "Geeks", "topic": "dict", "task": "iterate"}
|
||||
|
||||
# default loooping gives keys
|
||||
for keys in d:
|
||||
print(keys)
|
||||
|
||||
# looping through keys
|
||||
for keys in d.keys():
|
||||
print(keys)
|
||||
|
||||
</pre>
|
||||
</div>
|
||||
|
||||
<p>
|
||||
Iterate through both keys and values
|
||||
</p>
|
||||
|
||||
<p>
|
||||
You can use the built-in items() method to access both keys and items at the same time. items() method returns the view object that contains the key-value pair as tuples.
|
||||
</p>
|
||||
|
||||
<div class="org-src-container">
|
||||
<pre class="src src-python">
|
||||
# create a python dictionary
|
||||
d = {"name": "Geeks", "topic": "dict", "task": "iterate"}
|
||||
|
||||
# iterating both key and values
|
||||
for key, value in d.items():
|
||||
print(f"{key}: {value}")
|
||||
|
||||
</pre>
|
||||
</div>
|
||||
|
||||
<p>
|
||||
Sorting:
|
||||
</p>
|
||||
|
||||
<p>
|
||||
Lambda function accesses the key (item[0]) during sorting. It offers flexibility if you want to tweak the sorting logic later.
|
||||
</p>
|
||||
|
||||
<div class="org-src-container">
|
||||
<pre class="src src-python">import operator
|
||||
|
||||
a = {"Gfg": 5, "is": 7, "Best": 2, "for": 9, "geeks": 8}
|
||||
res = dict(sorted(a.items(), key=lambda item: item[0]))
|
||||
print(res)
|
||||
|
||||
</pre>
|
||||
</div>
|
||||
|
||||
<p>
|
||||
Explanation: `lambda item: item[0]` sorts the dictionary by the first element of each tuple (the key).
|
||||
</p>
|
||||
|
||||
<p>
|
||||
<a href="20250805143427-python_sorted_function.html#ID-3bbc6099-0187-4bf2-9282-97e5fa443f72">python-sorted-function</a>
|
||||
</p>
|
||||
|
||||
<p>
|
||||
<a href="20250805143741-python_lambda.html#ID-9d534e89-7f0b-494c-bff6-7b3be05b85d1">python-lambda</a>
|
||||
</p>
|
||||
|
||||
<p class="backlinks-section" id="backlinks">
|
||||
Backlinks
|
||||
</p>
|
||||
<ul class="org-ul backlinks-list">
|
||||
<li><a href="20250804212606-leetcode_arrays.html#ID-93a43a24-6861-40c4-b45b-581977bb55cf">leetcode-arrays</a></li>
|
||||
</ul>
|
||||
</div>
|
||||
</div></article></div></div>
|
||||
<div id="postamble" class="status">
|
||||
<footer>
|
||||
<div class="copyright-container">
|
||||
<div class="copyright">
|
||||
Copyright © 2022-2025 Zaine Qayyum. All rights reserved unless otherwise noted.</div></div>
|
||||
<div class="generated">
|
||||
Created with <a href="https://www.gnu.org/software/emacs/">Emacs</a> 30.2 (<a href="https://orgmode.org">Org</a> mode 9.7.11) on <a href="https://www.archlinux.org/">Arch</a> <a href="https://www.gnu.org">GNU</a>/<a href="https://www.kernel.org/">Linux</a>
|
||||
</div>
|
||||
</footer>
|
||||
</div>
|
||||
</body>
|
||||
</html>
|
||||
Reference in New Issue
Block a user