{"id":990,"date":"2018-07-17T18:25:53","date_gmt":"2018-07-17T10:25:53","guid":{"rendered":"http:\/\/www.sniper97.cn\/?p=990"},"modified":"2018-07-17T18:25:53","modified_gmt":"2018-07-17T10:25:53","slug":"pythonyield%e5%85%b3%e9%94%ae%e5%ad%97","status":"publish","type":"post","link":"http:\/\/www.sniper97.cn\/index.php\/note\/python\/990\/","title":{"rendered":"Python:yield\u5173\u952e\u5b57"},"content":{"rendered":"<p>yield\u662fpython\u91cc\u7684\u751f\u6210\u5668\uff0c\u6709\u6548\u5229\u7528yield\u53ef\u4ee5\u6709\u6548\u5730\u8282\u7ea6\u7a0b\u5e8f\u5360\u7528\u7684\u7cfb\u7edf\u8d44\u6e90\u3002<br \/>\n\u6bd4\u5982\u8fd9\u91cc\uff1a<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\"># parse the message with regex\ndef parse_one_page(html):\n    pattern = re.compile('&lt;dd&gt;.*?board-index.*?&gt;(.*?)&lt;\/i&gt;.*?title=\"(.*?)\".*?data-src=\"(.*?)\".*?class=\"star\"&gt;'\n                         '(.*?)&lt;\/p&gt;.*?releasetime\"&gt;(.*?)&lt;\/p&gt;.*?integer\"&gt;(.*?)&lt;\/i&gt;.*?fraction\"&gt;(.*?)&lt;\/i&gt;', re.S)\n    items = re.findall(pattern=pattern, string=html)\n    for item in items:\n        yield {\n            'index': item[0],\n            'title': item[1].strip(),\n            'image': item[2],\n            'actor': item[3].strip()[3:],\n            'time': item[4].strip()[5:],\n            'score': item[5].strip() + item[6].strip()\n        }\n    return items<\/pre>\n<p>\u8fd9\u91cc\u4f7f\u7528\u4e86yield\u5173\u952e\u5b57\uff0c\u5982\u679c\u4e0d\u4f7f\u7528\u90a3\u4e48\u8fd9\u4e2a\u6570\u636e\u7ed3\u6784\u4f1a\u5168\u90e8\u5b58\u50a8\u5728\u5185\u5b58\u4e2d\uff0c\u5982\u679c\u6570\u636e\u7ed3\u6784\u8fc7\u4e8e\u5e9e\u5927\uff0c\u4f1a\u5360\u7528\u5927\u91cf\u7684\u7cfb\u7edf\u8d44\u6e90\uff0c\u6240\u4ee5\u4f7f\u7528yield\u751f\u6210\u5668\uff0c\u76f8\u5f53\u4e8e\u6709\u4e00\u4e2a\u7d22\u5f15\uff0c\u53ea\u6709\u6bcf\u6b21\u8c03\u7528\u7684\u65f6\u5019\uff0c\u7d22\u5f15\u8fd4\u56de\u4e00\u6761\u6570\u636e\uff0c\u6240\u4ee5\u8fd9\u6837\u5c31\u4e0d\u4f1a\u5360\u7528\u5f88\u591a\u7684\u7cfb\u7edf\u8d44\u6e90\u3002<br \/>\n\u7a0b\u5e8f\u6267\u884c\u5230yield\u4e0d\u4f1a\u7ee7\u7eed\u6267\u884c\uff0c\u800c\u662f\u7b49\u5f85\uff0c\u53ea\u6709\u5f53\u8c03\u7528\u8005\u8c03\u7528\u8fd4\u56de\u65f6\u6267\u884c\u5e76\u8fd4\u56de\u6570\u636e\uff0c\u5e76\u5728\u4e0b\u4e00\u4e2ayield\u5904\u7b49\u5f85\u3002<br \/>\nyield\u6709\u4e24\u4e2a\u65b9\u6cd5\uff1a__next__() \u548csent()<br \/>\n\u7528\u6cd5\u57fa\u672c\u4e00\u6837\uff0c\u4e0d\u540c\u7684\u662f\u524d\u8005\u4eceyield\u524d\u5230\u4e0b\u4e00\u4e2ayield\u524d\uff0c\u800csent\u662f\u4eceyield\u540e\u5230\u4e0b\u4e00\u4e2ayield\u540e\uff0c\u6240\u4ee5\u7b2c\u4e00\u6b21\u8c03\u7528\u4e0d\u53ef\u4ee5\u8c03\u7528sent\uff08\uff09\uff0c\u540c\u65f6\uff0csent\uff08x\uff09\u53ef\u4ee5\u5bf9yield\u8868\u8fbe\u5f0f\u8fdb\u884c\u66f4\u6539\u3002<br \/>\n&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>yield\u662fpython\u91cc\u7684\u751f\u6210\u5668\uff0c\u6709\u6548\u5229\u7528yield\u53ef\u4ee5\u6709\u6548\u5730\u8282\u7ea6\u7a0b\u5e8f\u5360\u7528\u7684\u7cfb\u7edf\u8d44\u6e90\u3002 \u6bd4\u5982\u8fd9\u91cc\uff1a [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_mi_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[24],"tags":[],"views":4691,"_links":{"self":[{"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/posts\/990"}],"collection":[{"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/comments?post=990"}],"version-history":[{"count":0,"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/posts\/990\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/media?parent=990"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/categories?post=990"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/tags?post=990"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}