129 lines
14 KiB
HTML
129 lines
14 KiB
HTML
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<!DOCTYPE html><html><head><meta content="text/html; charset=utf-8" http-equiv="Content-Type" /><meta content="width=device-width, initial-scale=1" name="viewport" /><!--replace-start-0--><!--replace-start-5--><!--replace-start-8--><title>Strings in Python - My Zettelkasten</title><!--replace-end-8--><!--replace-end-5--><!--replace-end-0--><link href="https://cdn.jsdelivr.net/npm/fomantic-ui@2.8.7/dist/semantic.min.css" rel="stylesheet" /><link href="https://fonts.googleapis.com/css?family=Merriweather|Libre+Franklin|Roboto+Mono&display=swap" rel="stylesheet" /><!--replace-start-1--><!--replace-start-4--><!--replace-start-7--><link href="https://raw.githubusercontent.com/srid/neuron/master/assets/neuron.svg" rel="icon" /><meta content="Generally, anything that changes a string will be a method on the str class, rather than a built-in function like len(), as such it will use dot notation" name="description" /><meta content="Strings in Python" property="og:title" /><meta content="My Zettelkasten" property="og:site_name" /><meta content="article" property="og:type" /><meta content="Strings_in_Python" property="neuron:zettel-id" /><meta content="Strings_in_Python" property="neuron:zettel-slug" /><meta content="data-types" property="neuron:zettel-tag" /><meta content="python" property="neuron:zettel-tag" /><script type="application/ld+json">[]</script><style type="text/css">body{background-color:#eeeeee !important;font-family:"Libre Franklin", serif !important}body .ui.container{font-family:"Libre Franklin", serif !important}body h1, h2, h3, h4, h5, h6, .ui.header, .headerFont{font-family:"Merriweather", sans-serif !important}body code, pre, tt, .monoFont{font-family:"Roboto Mono","SFMono-Regular","Menlo","Monaco","Consolas","Liberation Mono","Courier New", monospace !important}body div.z-index p.info{color:#808080}body div.z-index ul{list-style-type:square;padding-left:1.5em}body div.z-index .uplinks{margin-left:0.29999em}body .zettel-content h1#title-h1{background-color:rgba(33,133,208,0.1)}body nav.bottomPane{background-color:rgba(33,133,208,2.0e-2)}body div#footnotes{border-top-color:#2185d0}body p{line-height:150%}body img{max-width:100%}body .deemphasized{font-size:0.94999em}body .deemphasized:hover{opacity:1}body .deemphasized:not(:hover){opacity:0.69999}body .deemphasized:not(:hover) a{color:#808080 !important}body div.container.universe{padding-top:1em}body div.zettel-view ul{padding-left:1.5em;list-style-type:square}body div.zettel-view .pandoc .highlight{background-color:#ffff00}body div.zettel-view .pandoc .ui.disabled.fitted.checkbox{margin-right:0.29999em;vertical-align:middle}body div.zettel-view .zettel-content .metadata{margin-top:1em}body div.zettel-view .zettel-content .metadata div.date{text-align:center;color:#808080}body div.zettel-view .zettel-content h1{padding-top:0.2em;padding-bottom:0.2em;text-align:center}body div.zettel-view .zettel-content h2{border-bottom:solid 1px #4682b4;margin-bottom:0.5em}body div.zettel-view .zettel-content h3{margin:0px 0px 0.4em 0px}body div.zettel-view .zettel-content h4{opacity:0.8}body div.zettel-view .zettel-content div#footnotes{margin-top:4em;border-top-style:groove;border-top-width:2px;font-size:0.9em}body div.zettel-view .zettel-content div#footnotes ol > li > p:only-of-type{display:inline;margin-right:0.5em}body div.zettel-view .zettel-content aside.footnote-inline{width:30%;padding-left:15px;margin-left:15px;float:right;background-color:#d3d3d3}body div.zettel-view .zettel-content .overflows{overflow:auto}body div.zettel-view .zettel-content code{margin:auto auto auto auto;font-size:100%}body div.zettel-view .zettel-content p code, li code, ol code{padding:0.2em 0.2em 0.2em 0.2em;background-color:#f5f2f0}body div.zettel-view .zettel-content pre{overflow:auto}body div.zettel-view .zettel-content dl dt{font-weight:bold}body div.zettel-view .zettel-content blockquote{background-color:#f9f9f9;border-left:solid 10px #cccccc;margin:1.5em 0px 1.5em 0px;padding:0.5em 10px 0.5em 10px}body div.zettel-view .zettel-content.raw{background-color:#dddddd}body .ui.label.ze
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<!--replace-end-7--><!--replace-end-4--><!--replace-end-1--></head><body><div class="ui fluid container universe"><!--replace-start-2--><!--replace-start-3--><!--replace-start-6--><div class="ui text container" id="zettel-container" style="position: relative"><div class="zettel-view"><article class="ui raised attached segment zettel-content"><div class="pandoc"><h1 id="title-h1">Strings in Python</h1><blockquote><p>Generally, anything that changes a string will be a method on the <code>str</code> class, rather than a built-in function like <code>len()</code>, as such it will use dot notation</p></blockquote><ul><li>Strings are <strong>immutable</strong>: string operations produce a new string.</li></ul><pre><code class="python language-python"># Working with Strings
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my_variable = 'Bob'
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print(my_variable)
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# Bob
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my_variable = "Eloise"
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print(my_variable)
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# Eloise
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# A multi line string
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my_variable = """
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Hello
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World
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"""
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print(my_variable)
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"""
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Hello
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World
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"""
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my_string = 'Hello World'
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print(len(my_string))
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# 11
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string_1 = 'Good'
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string_2 = " day"
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string_3 = string_1 + string_2
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print(string_3)
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# Good day
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msg = 'Hello Lloyd you are ' + str(21)
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print(msg)
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# Hello Lloyd you are 21
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# Range of String operations
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msg = 'Hello World'
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print(msg.replace("Hello", "Goodbye"))
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# Goodbye World
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print('Edward Alan Rawlings'.find('Alan'))
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# 7
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print('Edward John Rawlings'.find('Alan'))
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# -1
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print('James' == 'James') # prints True
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print('James' != 'John') # prints True
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print("msg.startswith('H')", msg.startswith('H'))
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# msg.startswith('H') True
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print("msg.endswith('d')", msg.endswith('d'))
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# msg.endswith('d') TRUE
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print('some_string.upper()', msg.upper())
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# some_string.upper() HELLO WORLD
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print('sub string: ', 'Hello-World'[1:5])
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# sub string: ello
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# String interpolation
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user_age = input("Please enter your age: ")
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print(f'You are {user_age}')</code></pre><h2 id="strsplit"><code>str.split()</code></h2><p>The <code>split()</code> function in Python is used to divide a string into multiple parts at the occurrence of a given separator. This function returns a <span class="zettel-link-container cf"><span class="zettel-link" title="Zettel: Lists in Python"><a href="Lists_in_Python.html">list</a></span></span> of substrings.</p><h3 id="general-syntax">General syntax</h3><pre><code class="py language-py">str.split(separator, maxsplit)</code></pre><ul><li><p>The <code>separator</code> is optional. It specifies the separator to use when splitting the string. If no separator is provided, it will default to using whitespace.</p></li><li><p><code>maxsplit</code> is also optional and specifies how many splits to do. Default value is -1, which is “all occurrences”.</p></li></ul><h3 id="examples">Examples</h3><pre><code class="py language-py">
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text = "Hello world, how are you?"
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# Default usage:
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x = text.split()
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print(x)
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# ['Hello', 'world', 'how', 'are', 'you?']
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# Using a specific separator
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x = text.split(",")
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print(x)
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# ['Hello', 'world how are you?']
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# Specifiying a maxplit value
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x = text.split(" ", 1)
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print(x)
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# ['Hello']</code></pre></div></article><nav class="ui attached segment deemphasized backlinksPane" id="neuron-backlinks-pane"><h3 class="ui header">Backlinks</h3><ul class="backlinks"><li><span class="zettel-link-container cf"><span class="zettel-link"><a href="Python_data_types.html">Python data-types</a></span></span><ul class="context-list" style="zoom: 85%;"><li class="item"><div class="pandoc"><span class="zettel-link-container cf"><span class="zettel-link" title="Zettel: Strings in Python"><a href="Strings_in_Python.html">str</a></span></span></div></li></ul></li></ul></nav><nav class="ui attached segment deemphasized bottomPane" id="neuron-tags-pane"><div><span class="ui basic label zettel-tag" title="Tag">data-types</span><span class="ui basic label zettel-tag" title="Tag">python</span></div></nav><nav class="ui bottom attached icon compact inverted menu blue" id="neuron-nav-bar"><!--replace-start-9--><!--replace-end-9--><a class="right item" href="impulse.html" title="Open Impulse"><i class="wave square icon"></i></a></nav></div></div><!--replace-end-6--><!--replace-end-3--><!--replace-end-2--><div class="ui center aligned container footer-version"><div class="ui tiny image"><a href="https://neuron.zettel.page"><img alt="logo" src="https://raw.githubusercontent.com/srid/neuron/master/assets/neuron.svg" title="Generated by Neuron 1.9.35.3" /></a></div></div></div></body></html>
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