{"id":2417,"date":"2017-06-30T20:50:34","date_gmt":"2017-06-30T12:50:34","guid":{"rendered":"http:\/\/cn.hostease.com\/xueyuan\/?p=2417"},"modified":"2017-06-30T20:50:34","modified_gmt":"2017-06-30T12:50:34","slug":"python%e5%9f%ba%e7%a1%8006-%e5%be%aa%e7%8e%af","status":"publish","type":"post","link":"https:\/\/cn.hostease.com\/xueyuan\/jishu\/python\/python%e5%9f%ba%e7%a1%8006-%e5%be%aa%e7%8e%af\/","title":{"rendered":"Python\u57fa\u784006 \u5faa\u73af"},"content":{"rendered":"<p>\u5faa\u73af\u7528\u4e8e\u91cd\u590d\u6267\u884c\u4e00\u4e9b\u7a0b\u5e8f\u5757\u3002\u4ece\u4e0a\u4e00\u8bb2\u7684\u9009\u62e9\u7ed3\u6784\uff0c\u6211\u4eec\u5df2\u7ecf\u770b\u5230\u4e86\u5982\u4f55\u7528\u7f29\u8fdb\u6765\u8868\u793a\u7a0b\u5e8f\u5757\u7684\u96b6\u5c5e\u5173\u7cfb\u3002\u5faa\u73af\u4e5f\u4f1a\u7528\u5230\u7c7b\u4f3c\u7684\u5199\u6cd5\u3002<\/p>\n<p>&nbsp;<\/p>\n<h3>for\u5faa\u73af<\/h3>\n<p>for\u5faa\u73af\u9700\u8981\u9884\u5148\u8bbe\u5b9a\u597d\u5faa\u73af\u7684\u6b21\u6570(n)\uff0c\u7136\u540e\u6267\u884c\u96b6\u5c5e\u4e8efor\u7684\u8bed\u53e5n\u6b21\u3002<\/p>\n<p>\u57fa\u672c\u6784\u9020\u662f<\/p>\n<div class=\"cnblogs_code\">\n<pre>for \u5143\u7d20 in \u5e8f\u5217: \r\n    statement<\/pre>\n<\/div>\n<p>&nbsp;<\/p>\n<p>\u4e3e\u4f8b\u6765\u8bf4\uff0c\u6211\u4eec\u7f16\u8f91\u4e00\u4e2a\u53ebforDemo.py\u7684\u6587\u4ef6<\/p>\n<div class=\"cnblogs_code\">\n<pre>for a in [3,4.4,'life']:\r\n    print a<\/pre>\n<\/div>\n<p>\u8fd9\u4e2a\u5faa\u73af\u5c31\u662f\u6bcf\u6b21\u4ece\u8868[3,4.4,&#8217;life&#8217;] \u4e2d\u53d6\u51fa\u4e00\u4e2a\u5143\u7d20\uff08\u56de\u5fc6\uff1a\u8868\u662f\u4e00\u79cd\u5e8f\u5217\uff09\uff0c\u7136\u540e\u5c06\u8fd9\u4e2a\u5143\u7d20\u8d4b\u503c\u7ed9a\uff0c\u4e4b\u540e\u6267\u884c\u96b6\u5c5e\u4e8efor\u7684\u64cd\u4f5c(print)\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u4ecb\u7ecd\u4e00\u4e2a\u65b0\u7684Python\u51fd\u6570range()\uff0c\u6765\u5e2e\u52a9\u4f60\u5efa\u7acb\u8868\u3002<\/p>\n<div class=\"cnblogs_code\">\n<pre>idx = range(5)\r\nprint idx<\/pre>\n<\/div>\n<p>\u53ef\u4ee5\u770b\u5230idx\u662f[0,1,2,3,4]<\/p>\n<p>\u8fd9\u4e2a\u51fd\u6570\u7684\u529f\u80fd\u662f\u65b0\u5efa\u4e00\u4e2a\u8868\u3002\u8fd9\u4e2a\u8868\u7684\u5143\u7d20\u90fd\u662f\u6574\u6570\uff0c\u4ece0\u5f00\u59cb\uff0c\u4e0b\u4e00\u4e2a\u5143\u7d20\u6bd4\u524d\u4e00\u4e2a\u59271\uff0c \u76f4\u5230\u51fd\u6570\u4e2d\u6240\u5199\u7684\u4e0a\u9650 \uff08\u4e0d\u5305\u62ec\u8be5\u4e0a\u9650\u672c\u8eab\uff09<\/p>\n<p>(\u5173\u4e8erange()\uff0c\u8fd8\u6709\u4e30\u5bcc\u7528\u6cd5\uff0c\u6709\u5174\u8da3\u53ef\u4ee5\u67e5\u9605\uff0c Python 3\u4e2d\uff0c range()\u7528\u6cd5\u6709\u53d8\u5316\uff0c\u89c1\u8bc4\u8bba\u533a)<\/p>\n<p>&nbsp;<\/p>\n<p>\u4e3e\u4f8b<\/p>\n<div class=\"cnblogs_code\">\n<pre>for a in range(10):\r\n    print a**2<\/pre>\n<\/div>\n<p>&nbsp;<\/p>\n<h3>while\u5faa\u73af<\/h3>\n<p>while\u7684\u7528\u6cd5\u662f<\/p>\n<div class=\"cnblogs_code\">\n<pre>while \u6761\u4ef6:\r\n    statement<\/pre>\n<\/div>\n<p>while\u4f1a\u4e0d\u505c\u5730\u5faa\u73af\u6267\u884c\u96b6\u5c5e\u4e8e\u5b83\u7684\u8bed\u53e5\uff0c\u76f4\u5230\u6761\u4ef6\u4e3a\u5047(False)<\/p>\n<p>&nbsp;<\/p>\n<p>\u4e3e\u4f8b<\/p>\n<div class=\"cnblogs_code\">\n<pre>while i &lt; 10:\r\n    print i\r\n    i = i + 1<\/pre>\n<\/div>\n<p>&nbsp;<\/p>\n<h3>\u4e2d\u65ad\u5faa\u73af<\/h3>\n<p>continue\u00a0\u00a0 # \u5728\u5faa\u73af\u7684\u67d0\u4e00\u6b21\u6267\u884c\u4e2d\uff0c\u5982\u679c\u9047\u5230continue, \u90a3\u4e48\u8df3\u8fc7\u8fd9\u4e00\u6b21\u6267\u884c\uff0c\u8fdb\u884c\u4e0b\u4e00\u6b21\u7684\u64cd\u4f5c<\/p>\n<p>break\u00a0\u00a0\u00a0\u00a0\u00a0 # \u505c\u6b62\u6267\u884c\u6574\u4e2a\u5faa\u73af<\/p>\n<div class=\"cnblogs_code\">\n<pre>for i in range(10):\r\n    if i == 2: \r\n        continue\r\n    print i<\/pre>\n<\/div>\n<p>&nbsp;<\/p>\n<p>\u5f53\u5faa\u73af\u6267\u884c\u5230i = 2\u7684\u65f6\u5019\uff0cif\u6761\u4ef6\u6210\u7acb\uff0c\u89e6\u53d1continue, \u8df3\u8fc7\u672c\u6b21\u6267\u884c(\u4e0d\u6267\u884cprint)\uff0c\u7ee7\u7eed\u8fdb\u884c\u4e0b\u4e00\u6b21\u6267\u884c(i = 3)\u3002<\/p>\n<div class=\"cnblogs_code\">\n<pre>for i in range(10):\r\n    if i == 2:        \r\n        break\r\n    print i<\/pre>\n<\/div>\n<p>\u5f53\u5faa\u73af\u6267\u884c\u5230i = 2\u7684\u65f6\u5019\uff0cif\u6761\u4ef6\u6210\u7acb\uff0c\u89e6\u53d1break, \u6574\u4e2a\u5faa\u73af\u505c\u6b62\u3002<\/p>\n<p>&nbsp;<\/p>\n<h3>\u603b\u7ed3<\/h3>\n<p>range()<\/p>\n<p>for \u5143\u7d20 in \u5e8f\u5217:<\/p>\n<p>while \u6761\u4ef6:<\/p>\n<p>continue<\/p>\n<p>break<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>\u6587\u7ae0\u6765\u81ea\u7f51\u7edc\u535a\u5ba2\uff1a\u4f5c\u8005\uff1aVamei \u51fa\u5904\uff1ahttps:\/\/www.cnblogs.com\/vamei<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5faa\u73af\u7528\u4e8e\u91cd\u590d\u6267\u884c\u4e00\u4e9b\u7a0b\u5e8f\u5757\u3002\u4ece\u4e0a\u4e00\u8bb2\u7684\u9009\u62e9\u7ed3\u6784\uff0c\u6211\u4eec\u5df2\u7ecf\u770b\u5230\u4e86\u5982\u4f55\u7528\u7f29\u8fdb\u6765\u8868\u793a\u7a0b\u5e8f\u5757\u7684\u96b6\u5c5e\u5173\u7cfb\u3002\u5faa\u73af\u4e5f\u4f1a\u7528\u5230\u7c7b &#8230; <a title=\"Python\u57fa\u784006 \u5faa\u73af\" class=\"read-more\" href=\"https:\/\/cn.hostease.com\/xueyuan\/jishu\/python\/python%e5%9f%ba%e7%a1%8006-%e5%be%aa%e7%8e%af\/\" aria-label=\"\u9605\u8bfb Python\u57fa\u784006 \u5faa\u73af\">\u9605\u8bfb\u66f4\u591a<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[654],"tags":[718,717],"class_list":["post-2417","post","type-post","status-publish","format-standard","hentry","category-python","tag-python"],"aioseo_notices":[],"jetpack_featured_media_url":"","jetpack-related-posts":[],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/posts\/2417","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/comments?post=2417"}],"version-history":[{"count":1,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/posts\/2417\/revisions"}],"predecessor-version":[{"id":2418,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/posts\/2417\/revisions\/2418"}],"wp:attachment":[{"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/media?parent=2417"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/categories?post=2417"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/tags?post=2417"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}