{"id":548,"date":"2019-01-12T21:58:23","date_gmt":"2019-01-12T12:58:23","guid":{"rendered":"https:\/\/www.nblog09.com\/w\/?p=548"},"modified":"2021-06-16T11:56:35","modified_gmt":"2021-06-16T02:56:35","slug":"python-has-next","status":"publish","type":"post","link":"https:\/\/www.nblog09.com\/w\/2019\/01\/12\/python-has-next\/","title":{"rendered":"Python\u306e\u30a4\u30c6\u30ec\u30fc\u30bf\u3067has_next()\u3092\u4f7f\u3046"},"content":{"rendered":"<p>Python\u306e\u30a4\u30c6\u30ec\u30fc\u30bf\u306b\u306f\u3001Java\u306ehas_next\u306e\u3088\u3046\u306a\u30e1\u30bd\u30c3\u30c9\u304c\u306a\u3044\u3002<\/p>\n<p>\u30a4\u30c6\u30ec\u30fc\u30bf\u306e\u6700\u5f8c\u307e\u3067\u5230\u9054\u3057\u305f\u3068\u304d\u3001StopIteration\u3068\u3044\u3046\u30a8\u30e9\u30fc\u304c\u6295\u3052\u3089\u308c\u3066\u30a4\u30c6\u30ec\u30fc\u30b7\u30e7\u30f3\u304c\u7d42\u4e86\u3059\u308b\u3002<br \/>\n\u305d\u306e\u305f\u3081\u3001<span class=\"pink_span\">StopIteration\u4f8b\u5916\u3092\u30ad\u30e3\u30c3\u30c1\u3059\u308b<\/span>\u5fc5\u8981\u304c\u3042\u308b\u3002<\/p>\n<p>\u3042\u308b\u3044\u306f\u3001next\u3067\u5024\u3092\u62bd\u51fa\u3059\u308b\u5834\u5408\u306b\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b<span class=\"pink_span\">\u7b2c\uff12\u5f15\u6570\u3092\u6307\u5b9a\u3057\u3066\u62bd\u51fa\u3059\u308b\u65b9\u6cd5<\/span>\u3082\u3042\u308b\u3002<\/p>\n<p><span class=\"red_span\"><br \/>\nvalue = next(iterator, None)<\/span> \u2190 next(iterator)\u304c\u30a8\u30e9\u30fc\u306e\u5834\u5408\u306bNone\u304c\u8fd4\u3055\u308c\u308b\u3002<\/p>\n<div class=\"programming-gray\">\n<ul>\n<li>\u30a4\u30c6\u30ec\u30fc\u30bf\u306e\u4f8b\u5916\u767a\u751f\u6642\u306e\u5bfe\u5fdc\u3092\u3057\u306a\u3044\u5834\u5408<\/li>\n<\/ul>\n<div class=\"programming-inside\">\nfruits = ['Apple', 'Grape', 'Banana', 'Lemon']<br \/>\niter_fruits = iter(fruits)<\/p>\n<p>fruit = next(iter_fruits)<br \/>\nwhile(fruit):<br \/>\n&nbsp;&nbsp;&nbsp;&nbsp;print(fruit)<br \/>\n&nbsp;&nbsp;&nbsp;&nbsp;fruit = <span class=\"codehighlight\">next<\/span>(iter_fruits) <\/p>\n<div># lemon\u307e\u3067\u5230\u9054\u3059\u308b\u3068\u3001\u305d\u306e\u6b21\u306b\u4f8b\u5916\u304c\u767a\u751f\u3059\u308b<\/div>\n<\/div>\n<ul>\n<li>\u4f8b\u5916\u3092\u30ad\u30e3\u30c3\u30c1\u3059\u308b\u5834\u5408<\/li>\n<\/ul>\n<div class=\"programming-inside\">\nfruits = ['Apple', 'Grape', 'Banana', 'Lemon']<\/p>\n<p>iter_fruits = iter(fruits)<\/p>\n<p>try:<br \/>\n&nbsp;&nbsp;&nbsp;&nbsp;fruit = next(iter_fruits)<br \/>\n&nbsp;&nbsp;&nbsp;&nbsp;while(fruit):<br \/>\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;print(fruit)<br \/>\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;fruit = <span class=\"codehighlight\">next<\/span>(iter_fruits)<br \/>\nexcept <span class=\"codehighlight\">StopIteration<\/span>: <strong># \u4f8b\u5916\u3092\u30ad\u30e3\u30c3\u30c1<\/strong><br \/>\n&nbsp;&nbsp;&nbsp;&nbsp;pass\n<\/div>\n<ul>\n<li>\u4f8b\u5916\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u306b\u5225\u306e\u5024\u3092\u8fd4\u3059\u5834\u5408<\/li>\n<\/ul>\n<div class=\"programming-inside\">\nfruits = ['Apple', 'Grape', 'Banana', 'Lemon']<\/p>\n<p>iter_fruits = iter(fruits)<\/p>\n<p>fruit = <span class=\"codehighlight\">next<\/span>(iter_fruits, <span class=\"codehighlight\">None<\/span>)<strong># \u7b2c2\u5f15\u6570\u3092\u4e0e\u3048\u308b<\/strong><br \/>\nwhile(fruit):<br \/>\n&nbsp;&nbsp;&nbsp;&nbsp;print(fruit)<br \/>\n&nbsp;&nbsp;&nbsp;&nbsp;fruit = next(iter_fruits, None) <strong># \u4f8b\u5916\u304c\u767a\u751f\u3059\u308b\u3068None\u3092\u8fd4\u3057\u3066\u3001\u30eb\u30fc\u30d7\u3092\u629c\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u308b<\/strong>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Python\u306e\u30a4\u30c6\u30ec\u30fc\u30bf\u306b\u306f\u3001Java\u306ehas_next\u306e\u3088\u3046\u306a\u30e1\u30bd\u30c3\u30c9\u304c\u306a\u3044\u3002 \u30a4\u30c6\u30ec\u30fc\u30bf\u306e\u6700\u5f8c\u307e\u3067\u5230\u9054\u3057\u305f\u3068\u304d\u3001StopIteration\u3068\u3044\u3046\u30a8\u30e9\u30fc\u304c\u6295\u3052\u3089\u308c\u3066\u30a4\u30c6\u30ec\u30fc\u30b7\u30e7\u30f3\u304c\u7d42\u4e86\u3059\u308b\u3002 \u305d\u306e\u305f\u3081\u3001StopIter [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":334,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_uag_custom_page_level_css":"","_uf_show_specific_survey":0,"_uf_disable_surveys":false,"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[9,219],"tags":[120,119,14],"class_list":{"0":"post-548","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-python","8":"category-it-programming","9":"tag-has_next","10":"tag-iterator","11":"tag-python","12":"entry"},"uagb_featured_image_src":{"full":["https:\/\/www.nblog09.com\/w\/wp-content\/uploads\/2018\/12\/simpolo-2032198__480.jpg",732,480,false],"thumbnail":["https:\/\/www.nblog09.com\/w\/wp-content\/uploads\/2018\/12\/simpolo-2032198__480-150x150.jpg",150,150,true],"medium":["https:\/\/www.nblog09.com\/w\/wp-content\/uploads\/2018\/12\/simpolo-2032198__480-300x197.jpg",300,197,true],"medium_large":["https:\/\/www.nblog09.com\/w\/wp-content\/uploads\/2018\/12\/simpolo-2032198__480.jpg",732,480,false],"large":["https:\/\/www.nblog09.com\/w\/wp-content\/uploads\/2018\/12\/simpolo-2032198__480.jpg",732,480,false],"1536x1536":["https:\/\/www.nblog09.com\/w\/wp-content\/uploads\/2018\/12\/simpolo-2032198__480.jpg",732,480,false],"2048x2048":["https:\/\/www.nblog09.com\/w\/wp-content\/uploads\/2018\/12\/simpolo-2032198__480.jpg",732,480,false],"home-middle":["https:\/\/www.nblog09.com\/w\/wp-content\/uploads\/2018\/12\/simpolo-2032198__480.jpg",534,350,false],"home-top":["https:\/\/www.nblog09.com\/w\/wp-content\/uploads\/2018\/12\/simpolo-2032198__480.jpg",641,420,false],"sidebar-thumbnail":["https:\/\/www.nblog09.com\/w\/wp-content\/uploads\/2018\/12\/simpolo-2032198__480.jpg",100,66,false]},"uagb_author_info":{"display_name":"9nmatsumoto","author_link":"https:\/\/www.nblog09.com\/w\/author\/9nmatsumoto\/"},"uagb_comment_info":0,"uagb_excerpt":"Python\u306e\u30a4\u30c6\u30ec\u30fc\u30bf\u306b\u306f\u3001Java\u306ehas_next\u306e\u3088\u3046\u306a\u30e1\u30bd\u30c3\u30c9\u304c\u306a\u3044\u3002 \u30a4\u30c6\u30ec\u30fc\u30bf\u306e\u6700\u5f8c\u307e\u3067\u5230\u9054\u3057\u305f&hellip;","_links":{"self":[{"href":"https:\/\/www.nblog09.com\/w\/wp-json\/wp\/v2\/posts\/548","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.nblog09.com\/w\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.nblog09.com\/w\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.nblog09.com\/w\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.nblog09.com\/w\/wp-json\/wp\/v2\/comments?post=548"}],"version-history":[{"count":11,"href":"https:\/\/www.nblog09.com\/w\/wp-json\/wp\/v2\/posts\/548\/revisions"}],"predecessor-version":[{"id":3079,"href":"https:\/\/www.nblog09.com\/w\/wp-json\/wp\/v2\/posts\/548\/revisions\/3079"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.nblog09.com\/w\/wp-json\/wp\/v2\/media\/334"}],"wp:attachment":[{"href":"https:\/\/www.nblog09.com\/w\/wp-json\/wp\/v2\/media?parent=548"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.nblog09.com\/w\/wp-json\/wp\/v2\/categories?post=548"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.nblog09.com\/w\/wp-json\/wp\/v2\/tags?post=548"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}