{"id":334,"date":"2016-03-24T10:08:58","date_gmt":"2016-03-24T09:08:58","guid":{"rendered":"http:\/\/wordpress.callac.online\/index.php\/caracteres-et-chaines-de-caracteres-en-python\/"},"modified":"2022-01-05T22:41:54","modified_gmt":"2022-01-05T21:41:54","slug":"caracteres-et-chaines-de-caracteres-en-python","status":"publish","type":"page","link":"https:\/\/wordpress.callac.online\/index.php\/python\/generalites-sur-python\/caracteres-et-chaines-de-caracteres-en-python\/","title":{"rendered":"Caract\u00e8res et cha\u00eenes de caract\u00e8res en Python"},"content":{"rendered":"<h2>Tests sur les caract\u00e8res et sur les cha\u00eenes<\/h2>\n<ul>\n<li><strong>isalpha()<\/strong> : teste si ce sont tous des lettres.<\/li>\n<li><strong>isdigit()<\/strong> : teste si ce sont tous des chiffres.<\/li>\n<li><strong>isalnum()<\/strong> : teste si ce sont tous des caract\u00e8res alphanum\u00e9riques.<\/li>\n<li><strong>isspace()<\/strong> : teste s&rsquo;il n&rsquo;y a que des espaces.<\/li>\n<li><strong>istitle()<\/strong> : teste si les premi\u00e8res lettres de chaque mot sont les seules en majuscules.<\/li>\n<li><strong>islower()<\/strong> : teste si toutes les lettres sont en minuscules.<\/li>\n<li><strong>isupper()<\/strong> : teste si toutes les lettres sont en majuscules.<\/li>\n<li><strong>endwith(\u00ab\u00a0machaine\u00a0\u00bb)<\/strong> : teste si la cha\u00eene se termine par \u00ab\u00a0machaine\u00a0\u00bb.<\/li>\n<\/ul>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\">&gt;&gt;&gt; a=\"Moi\"\n&gt;&gt;&gt; a.islower()\nFalse\n&gt;&gt;&gt; a.lower()\n'moi'\n&gt;&gt;&gt; print(a)\nMoi\n&gt;&gt;&gt; a=a.lower()\n&gt;&gt;&gt; print(a)\nmoi\n&gt;&gt;&gt; a.islower()\nTrue<\/pre>\n<h2>Manipulation sur les caract\u00e8res et sur les cha\u00eenes<\/h2>\n<p>Les m\u00e9thodes sont nombreuses. En voici juste quelques unes :<\/p>\n<ul>\n<li><strong>lower()<\/strong> : tout mettre en minuscules.<\/li>\n<li><strong>upper()<\/strong> : tout mettre en majuscules.<\/li>\n<li><strong>replace(\u00ab\u00a0ceci\u00a0\u00bb,\u00a0\u00bbcela\u00a0\u00bb)<\/strong> : remplace les occurrences de \u00ab\u00a0ceci\u00a0\u00bb par \u00ab\u00a0cela\u00a0\u00bb.<\/li>\n<li><strong>join(maListe)<\/strong> : concat\u00e8ne des cha\u00eenes d&rsquo;une liste en choisissant un s\u00e9parateur.<\/li>\n<\/ul>\n<p>On peut aussi se servir de la fonction <strong>sorted()<\/strong> pour classer les lettres (mais on obtient une liste).<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\">a=\"moi\"\n&gt;&gt;&gt; sorted(a)\n['i', 'm', 'o']\n&gt;&gt;&gt; b=sorted(a)\n&gt;&gt;&gt; print(b)\n['i', 'm', 'o']\n&gt;&gt;&gt; c=''.join(b)\n&gt;&gt;&gt; print(c)\nimo<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Tests sur les caract\u00e8res et sur les cha\u00eenes isalpha() : teste si ce sont tous des lettres. isdigit() : teste si ce sont tous des chiffres. isalnum() : teste si&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":1649,"menu_order":7,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-334","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Caract\u00e8res et cha\u00eenes de caract\u00e8res en Python - Maths &amp; 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