{"id":3905,"date":"2023-01-07T12:00:25","date_gmt":"2023-01-07T03:00:25","guid":{"rendered":"https:\/\/www.bold.ne.jp\/engineer-club\/?p=3905"},"modified":"2025-11-19T10:53:12","modified_gmt":"2025-11-19T01:53:12","slug":"python-if","status":"publish","type":"post","link":"https:\/\/www.bold.ne.jp\/engineer-club\/python-if","title":{"rendered":"Python \u306eif\u3068\u306f\uff1fif\u6587\u3092\u4f7f\u3063\u305f\u6761\u4ef6\u5206\u5c90\u306b\u3064\u3044\u3066\u89e3\u8aac"},"content":{"rendered":"<p>\u6570\u591a\u304f\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u306bif\u3092\u4f7f\u3063\u305f\u6761\u4ef6\u5206\u5c90\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u8a00\u8a9e\u306b\u3088\u3063\u3066\u305d\u306e\u66f8\u304d\u65b9\u306f\u9055\u3046\u3082\u306e\u3067\u3059\u3002<\/p>\n<p>\u3053\u306e\u8a18\u4e8b\u3067\u306fPython\u306eif\u6587\u306b\u3064\u3044\u3066\u66f8\u304d\u307e\u3059\u3002\u306a\u304a\u3001\u8aac\u660e\u306b\u4f7f\u7528\u3057\u305f\u30bd\u30fc\u30b9\u306f\u30d0\u30fc\u30b8\u30e7\u30f33.9.13\u3067\u52d5\u4f5c\u3092\u78ba\u8a8d\u3057\u307e\u3057\u305f\u3002<\/p>\n<div id=\"toc_container\" class=\"no_bullets\"><p class=\"toc_title\">\u76ee\u6b21<\/p><ul class=\"toc_list\"><li><a href=\"#Pythonif\">\uff11\uff0ePython\u306eif\u6587\u306e\u7279\u5fb4<\/a><\/li><li><a href=\"#Pythonif-2\">\uff12\uff0ePython\u306eif\u6587\u3067\u4f7f\u7528\u3059\u308b\u30ad\u30fc\u30ef\u30fc\u30c9<\/a><\/li><li><a href=\"#if\">\uff13\uff0eif\u6587\u306e\u66f8\u304d\u65b9<\/a><ul><li><a href=\"#if-2\">\u2460\u30ad\u30fc\u30ef\u30fc\u30c9if\u3092\u4f7f\u7528\u3057\u3066\u6761\u4ef6\u304c\u6210\u7acb\u3057\u305f\u6642\u306e\u51e6\u7406\u3092\u66f8\u304f\u3002<\/a><\/li><li><a href=\"#else\">\u2461\u30ad\u30fc\u30ef\u30fc\u30c9else\u3092\u4f7f\u7528\u3057\u3066\u6761\u4ef6\u304c\u6210\u7acb\u3057\u306a\u304b\u3063\u305f\u6642\u306e\u51e6\u7406\u3092\u66f8\u304f<\/a><\/li><li><a href=\"#elifif\">\u2462\u30ad\u30fc\u30ef\u30fc\u30c9elif\u3092\u4f7f\u7528\u3057\u3066\u30ad\u30fc\u30ef\u30fc\u30c9if\u306e\u6761\u4ef6\u3068\u306f\u5225\u306e\u6761\u4ef6\u304c\u6210\u7acb\u3057\u305f\u6642\u306e\u51e6\u7406\u3092\u66f8\u304f<\/a><\/li><li><a href=\"#ifelifelse\">\u2463\u30ad\u30fc\u30ef\u30fc\u30c9if\u3001elif\u3001else\u3092\u4f7f\u7528\u3059\u308b<\/a><\/li><\/ul><\/li><li><a href=\"#if-3\">\uff14\uff0eif\u6587\u306e\u66f8\u304d\u65b9\u3000\u88dc\u8db3<\/a><\/li><li><a href=\"#i\">\uff15\uff0e\u3055\u3044\u3054\u306b<\/a><\/li><\/ul><\/div>\n<h2><span id=\"Pythonif\">\uff11\uff0ePython\u306e<span>if<\/span>\u6587\u306e\u7279\u5fb4<\/span><\/h2>\n<p>Python\u306e<span>if<\/span>\u6587\u306e\u7279\u5fb4\u3068\u3057\u3066\u3001\u6b21\u306e\uff12\u3064\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<ol>\n<li><strong>if\u6587\u3067\u4f7f\u7528\u3055\u308c\u308b\u30ad\u30fc\u30ef\u30fc\u30c9if\u3001elif\u3001else\u306e\u884c\u306f:\uff08\u30b3\u30ed\u30f3\uff09\u3067\u7d42\u308f\u308b\u3002\u4f46\u3057\u3001:\u306b\u7d9a\u3051\u3066\u30b3\u30e1\u30f3\u30c8\u3092\u3064\u3051\u308b\u3053\u3068\u306f\u3067\u304d\u308b\u3002<\/strong><\/li>\n<li><strong>\u6761\u4ef6\u304c\u6210\u7acb\u3057\u305f\u6642\u3001\u6210\u7acb\u3057\u306a\u304b\u3063\u305f\u6642\u306e\u51e6\u7406\u306f\u3001\u5b57\u4e0b\u3052\u3057\u3066\u66f8\u304f\u3002<\/strong><\/li>\n<\/ol>\n<p>\u5b57\u4e0b\u3052\u306f<span>PEP8<\/span>\uff08Python\u3067\u5171\u901a\u306e\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u898f\u7d04\uff09\u3067\u30b9\u30da\u30fc\u30b9<span>4<\/span>\u3064\u304c\u63a8\u5968\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u4f8b\uff1a<\/p>\n<pre class=\"prettyprint lang:default decode:true\">level = 1\r\nif level == 1: #\u6761\u4ef6\r\nprint('\u30ec\u30d9\u30eb1\u3067\u3059\u3002') #\u6761\u4ef6\u304c\u6210\u7acb\u3057\u305f\u6642\u306e\u51e6\u7406\r\nelif level == 2: #\u6761\u4ef6\r\nprint('\u30ec\u30d9\u30eb\uff12\u3067\u3059\u3002') #\u5225\u306e\u6761\u4ef6\u304c\u6210\u7acb\u3057\u305f\u6642\u306e\u51e6\u7406\r\nelse:\r\nprint('\u30ec\u30d9\u30eb\u5224\u5b9a\u4e0d\u80fd\u3067\u3059\u3002') #\u6761\u4ef6\u304c\u6210\u7acb\u3057\u306a\u304b\u3063\u305f\u6642\u306e\u51e6\u7406<\/pre>\n<h2><span id=\"Pythonif-2\">\uff12\uff0ePython\u306eif\u6587\u3067\u4f7f\u7528\u3059\u308b\u30ad\u30fc\u30ef\u30fc\u30c9<\/span><\/h2>\n<p>Python\u3067\u306f\u3001\u6b21\u306e\uff13\u3064\u306e\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n<ul>\n<li><span>if<\/span>\u3000<\/li>\n<li><span>elif<\/span>\u3000<\/li>\n<li><span>else<\/span><\/li>\n<\/ul>\n<p>if\u306f\u5fc5\u305a\u4f7f\u7528\u3057\u307e\u3059\u304c\u3001<span>elif<\/span>\u3001<span>else<\/span>\u306f\u5fc5\u9808\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<h2><span id=\"if\">\uff13\uff0eif\u6587\u306e\u66f8\u304d\u65b9<\/span><\/h2>\n<h3><span id=\"if-2\"><strong>\u2460\u30ad\u30fc\u30ef\u30fc\u30c9if\u3092\u4f7f\u7528\u3057\u3066\u6761\u4ef6\u304c\u6210\u7acb\u3057\u305f\u6642\u306e\u51e6\u7406\u3092\u66f8\u304f\u3002<\/strong><\/span><\/h3>\n<p>if \u306e\u5f8c\u306b\u6761\u4ef6\u5f0f\u3092\u7d9a\u3051:\u3092\u66f8\u304d\u3001\u6539\u884c\u3001\u5b57\u4e0b\u3052\u3092\u3057\u3066\u6761\u4ef6\u6210\u7acb\u6642\u306e\u51e6\u7406\u3092\u66f8\u304d\u307e\u3059\u3002<\/p>\n<p>\u4f8b\uff1a<\/p>\n<pre class=\"prettyprint lang:default decode:true\">evel = 1\r\nif level == 1: #\u6761\u4ef6\r\nprint('\u30ec\u30d9\u30eb1\u3067\u3059\u3002') #\u6761\u4ef6\u304c\u6210\u7acb\u6642\u306e\u51e6\u7406<\/pre>\n<p>\u51e6\u7406\u7d50\u679c\uff1a<\/p>\n<pre class=\"prettyprint lang:default decode:true\">\u30ec\u30d9\u30eb1\u3067\u3059\u3002<\/pre>\n<h3><span id=\"else\"><strong>\u2461\u30ad\u30fc\u30ef\u30fc\u30c9else\u3092\u4f7f\u7528\u3057\u3066\u6761\u4ef6\u304c\u6210\u7acb\u3057\u306a\u304b\u3063\u305f\u6642\u306e\u51e6\u7406\u3092\u66f8\u304f<\/strong><\/span><\/h3>\n<p>\u2460\u306e\u4f8b\u306e\u6b21\u306e\u884c\u306b\u3001<span>else:<\/span>\u3092\u66f8\u304d\u307e\u3059\u3002\u305d\u306e\u969b\u3001\u5b57\u4e0b\u3052\u306f\u4e0d\u8981\u3067<span>if<\/span>\u3068\u540c\u3058\u4f4d\u7f6e\u306b\u3057\u307e\u3059\u3002\u6539\u884c\u3001\u5b57\u4e0b\u3052\u3092\u3057\u3066\u6761\u4ef6\u304c\u6210\u7acb\u3057\u306a\u304b\u3063\u305f\u6642\u306e\u51e6\u7406\u3092\u66f8\u304d\u307e\u3059\u3002<\/p>\n<p>\u4f8b\uff1a<\/p>\n<pre class=\"prettyprint lang:default decode:true\">level = 0\r\nif level == 1: #\u6761\u4ef6\r\nprint('\u30ec\u30d9\u30eb1\u3067\u3059\u3002') #\u6761\u4ef6\u304c\u6210\u7acb\u6642\u306e\u51e6\u7406\r\nelse:\r\nprint('\u30ec\u30d9\u30eb\u5224\u5b9a\u4e0d\u80fd\u3067\u3059\u3002') #\u6761\u4ef6\u304c\u6210\u7acb\u3057\u306a\u304b\u3063\u305f\u6642\u306e\u51e6\u7406<\/pre>\n<p>\u51e6\u7406\u7d50\u679c\uff1a<\/p>\n<pre class=\"prettyprint lang:default decode:true\">\u30ec\u30d9\u30eb\u5224\u5b9a\u4e0d\u80fd\u3067\u3059\u3002<\/pre>\n<h3><span id=\"elifif\"><strong>\u2462\u30ad\u30fc\u30ef\u30fc\u30c9elif\u3092\u4f7f\u7528\u3057\u3066\u30ad\u30fc\u30ef\u30fc\u30c9if\u306e\u6761\u4ef6\u3068\u306f\u5225\u306e\u6761\u4ef6\u304c\u6210\u7acb\u3057\u305f\u6642\u306e\u51e6\u7406\u3092\u66f8\u304f<\/strong><\/span><\/h3>\n<p>\u2460\u306e\u4f8b\u306e\u6b21\u306e\u884c\u306b\u3001<span>elif<\/span>\u3092\u66f8\u304d\u3001\u7d9a\u3051\u3066\u8ffd\u52a0\u3059\u308b\u5225\u306e\u6761\u4ef6\u5f0f\u3068<span>:<\/span>\u3092\u66f8\u304d\u307e\u3059\u3002\u305d\u306e\u969b\u3001\u5b57\u4e0b\u3052\u306f\u4e0d\u8981\u3067<span>if<\/span>\u3068\u540c\u3058\u4f4d\u7f6e\u306b\u3057\u307e\u3059\u3002\u6539\u884c\u3001\u5b57\u4e0b\u3052\u3092\u3057\u3066\u5225\u306e\u6761\u4ef6\u304c\u6210\u7acb\u3057\u305f\u6642\u306e\u51e6\u7406\u3092\u66f8\u304d\u307e\u3059\u3002<\/p>\n<p>\u4f8b\uff1a<\/p>\n<pre class=\"prettyprint lang:default decode:true\">level = 2\r\nif level == 1: #\u6761\u4ef6\r\nprint('\u30ec\u30d9\u30eb1\u3067\u3059\u3002') #\u6761\u4ef6\u304c\u6210\u7acb\u6642\u306e\u51e6\u7406\r\nelif level == 2:\r\nprint('\u30ec\u30d9\u30eb\uff12\u3067\u3059\u3002') #\u5225\u306e\u6761\u4ef6\u304c\u6210\u7acb\u3057\u305f\u6642\u306e\u51e6\u7406<\/pre>\n<p>\u51e6\u7406\u7d50\u679c\uff1a<\/p>\n<pre class=\"prettyprint lang:default decode:true\">\u30ec\u30d9\u30eb\uff12\u3067\u3059\u3002<\/pre>\n<h3><span id=\"ifelifelse\"><strong>\u2463\u30ad\u30fc\u30ef\u30fc\u30c9if\u3001elif\u3001else\u3092\u4f7f\u7528\u3059\u308b<\/strong><\/span><\/h3>\n<p>\u4e0b\u8a18\u306f\u3001\u30ad\u30fc\u30ef\u30fc\u30c9<span>if<\/span>\u3001<span>elif<\/span>\u3001<span>else<\/span>\u3092\u4f7f\u7528\u3057\u305f\u4f8b\u3067\u3059\u3002<\/p>\n<p>\u4f8b\uff1a<\/p>\n<pre class=\"prettyprint lang:default decode:true\">level = 3\r\nif level == 1: #\u6761\u4ef6\r\nprint('\u30ec\u30d9\u30eb1\u3067\u3059\u3002') #\u6761\u4ef6\u304c\u6210\u7acb\u3057\u305f\u6642\u306e\u51e6\u7406\r\nelif level == 2: #\u6761\u4ef6\r\nprint('\u30ec\u30d9\u30eb\uff12\u3067\u3059\u3002') #\u5225\u306e\u6761\u4ef6\u304c\u6210\u7acb\u3057\u305f\u6642\u306e\u51e6\u7406\r\nelse:\r\nprint('\u30ec\u30d9\u30eb\u5224\u5b9a\u4e0d\u80fd\u3067\u3059\u3002') #\u6761\u4ef6\u304c\u6210\u7acb\u3057\u306a\u304b\u3063\u305f\u6642\u306e\u51e6\u7406<\/pre>\n<p>\u51e6\u7406\u7d50\u679c\uff1a<\/p>\n<pre class=\"prettyprint lang:default decode:true\">\u30ec\u30d9\u30eb\u5224\u5b9a\u4e0d\u80fd\u3067\u3059\u3002<\/pre>\n<p>\u4e0b\u8a18\u306f\u3001\u4e0a\u8a18\u306b<span>elif<\/span>\u3092\u3082\u3046\u4e00\u3064\u8ffd\u52a0\u3057\u305f\u4f8b\u3067\u3059\u3002<span>elif<\/span>\u3092\u4f7f\u7528\u3057\u3066\u8907\u6570\u306e\u6761\u4ef6\u3092\u8ffd\u52a0\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u4f8b\uff1a<\/p>\n<pre class=\"prettyprint lang:default decode:true\">level = 3\r\nif level == 1: #\u6761\u4ef6\r\nprint('\u30ec\u30d9\u30eb1\u3067\u3059\u3002') #\u6761\u4ef6\u304c\u6210\u7acb\u3057\u305f\u6642\u306e\u51e6\u7406\r\nelif level == 2: #\u6761\u4ef6\r\nprint('\u30ec\u30d9\u30eb\uff12\u3067\u3059\u3002') #\u5225\u306e\u6761\u4ef6\u304c\u6210\u7acb\u3057\u305f\u6642\u306e\u51e6\u7406\r\nelif level == 3: #\u6761\u4ef6\r\nprint('\u30ec\u30d9\u30eb\uff13\u3067\u3059\u3002') #\u5225\u306e\u6761\u4ef6\u304c\u6210\u7acb\u3057\u305f\u6642\u306e\u51e6\u7406\r\nelse:\r\nprint('\u30ec\u30d9\u30eb\u5224\u5b9a\u4e0d\u80fd\u3067\u3059\u3002') #\u6761\u4ef6\u304c\u6210\u7acb\u3057\u306a\u304b\u3063\u305f\u6642\u306e\u51e6\u7406<\/pre>\n<p>\u51e6\u7406\u7d50\u679c\uff1a<\/p>\n<pre class=\"prettyprint lang:default decode:true\">\u30ec\u30d9\u30eb\uff13\u3067\u3059\u3002<\/pre>\n<h2><span id=\"if-3\">\uff14\uff0eif\u6587\u306e\u66f8\u304d\u65b9\u3000\u88dc\u8db3<\/span><\/h2>\n<p>\u6761\u4ef6\u304c\u6210\u7acb\u3057\u305f\u6642\u3001\u5225\u306e\u6761\u4ef6\u304c\u6210\u7acb\u3057\u305f\u6642\u3001\u6210\u7acb\u3057\u306a\u304b\u3063\u305f\u6642\u306e\u51e6\u7406\u304c\u3002\uff12\u884c\u4ee5\u4e0a\u306e\u6642\u306f\uff11\u884c\u306e\u6642\u3068\u540c\u3058\u3088\u3046\u306b\u5b57\u4e0b\u3052\u3057\u3066\u66f8\u304d\u307e\u3059\u3002<\/p>\n<p>\u4f8b\uff1a<\/p>\n<pre class=\"prettyprint lang:default decode:true\">level = 2\r\nif level == 1: #\u6761\u4ef6\r\nprint('\u30ec\u30d9\u30eb1\u3067\u3059\u3002') #\u6761\u4ef6\u304c\u6210\u7acb\u3057\u305f\u6642\u306e\u51e6\u7406\r\nprint('\u3053\u308c\u304b\u3089\u3067\u3059\u3002') #\u6761\u4ef6\u304c\u6210\u7acb\u3057\u305f\u6642\u306e\u51e6\u7406\r\nelif level == 2: #\u6761\u4ef6\r\nprint('\u30ec\u30d9\u30eb\uff12\u3067\u3059\u3002') #\u5225\u306e\u6761\u4ef6\u304c\u6210\u7acb\u3057\u305f\u6642\u306e\u51e6\u7406\r\nprint('\u307e\u3060\u307e\u3060\u4e0a\u3092\u76ee\u6307\u3057\u307e\u3059\u3002') #\u5225\u306e\u6761\u4ef6\u304c\u6210\u7acb\u3057\u305f\u6642\u306e\u51e6\u7406\r\nelse:\r\nprint('\u30ec\u30d9\u30eb\u5224\u5b9a\u4e0d\u80fd\u3067\u3059\u3002') #\u6761\u4ef6\u304c\u6210\u7acb\u3057\u306a\u304b\u3063\u305f\u6642\u306e\u51e6\u7406\r\nprint('\u51fa\u76f4\u3057\u307e\u3059\u3002') #\u6761\u4ef6\u304c\u6210\u7acb\u3057\u306a\u304b\u3063\u305f\u6642\u306e\u51e6\u7406<\/pre>\n<p>\u51e6\u7406\u7d50\u679c\uff1a<\/p>\n<pre class=\"prettyprint lang:default decode:true\">\u30ec\u30d9\u30eb\uff12\u3067\u3059\u3002\r\n\u307e\u3060\u307e\u3060\u4e0a\u3092\u76ee\u6307\u3057\u307e\u3059\u3002<\/pre>\n<h2><span id=\"i\">\uff15\uff0e\u3055\u3044\u3054\u306b<\/span><\/h2>\n<p>Python\u306e<span>if<\/span>\u6587\u306b\u3064\u3044\u3066\u3001\u307e\u3068\u3081\u3066\u307f\u307e\u3057\u305f\u3002\u79c1\u81ea\u8eab\u3082\u5c11\u3057\u30ec\u30d9\u30eb\u30a2\u30c3\u30d7\u3067\u304d\u305f\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6570\u591a\u304f\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u306bif\u3092\u4f7f\u3063\u305f\u6761\u4ef6\u5206\u5c90\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u8a00\u8a9e\u306b\u3088\u3063\u3066\u305d\u306e\u66f8\u304d\u65b9\u306f\u9055\u3046\u3082\u306e\u3067\u3059\u3002 \u3053\u306e\u8a18\u4e8b\u3067\u306fPython\u306eif\u6587\u306b\u3064\u3044\u3066\u66f8\u304d\u307e\u3059\u3002\u306a\u304a\u3001\u8aac\u660e\u306b\u4f7f\u7528\u3057\u305f\u30bd\u30fc\u30b9\u306f\u30d0\u30fc\u30b8\u30e7\u30f33.9.13\u3067\u52d5\u4f5c\u3092\u78ba\u8a8d\u3057\u307e\u3057 [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":3908,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[25],"acf":[],"_links":{"self":[{"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/posts\/3905"}],"collection":[{"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/comments?post=3905"}],"version-history":[{"count":7,"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/posts\/3905\/revisions"}],"predecessor-version":[{"id":6118,"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/posts\/3905\/revisions\/6118"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/media\/3908"}],"wp:attachment":[{"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/media?parent=3905"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/categories?post=3905"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}