{"id":176862,"date":"2024-05-08T19:19:18","date_gmt":"2024-05-08T11:19:18","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/176862.html"},"modified":"2024-05-08T19:19:21","modified_gmt":"2024-05-08T11:19:21","slug":"python%e4%b8%ad%ef%bc%8c%e6%80%8e%e4%b9%88%e7%90%86%e8%a7%a3%e4%b8%80%e4%b8%aa%e6%95%b4%e6%95%b0%e6%98%aftrue%e6%88%96false","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/176862.html","title":{"rendered":"python\u4e2d\uff0c\u600e\u4e48\u7406\u89e3\u4e00\u4e2a\u6574\u6570\u662ftrue\u6216false"},"content":{"rendered":"<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/27060658\/036b0f7b-6138-4da5-b60d-db32fc6987dd.webp\" alt=\"python\u4e2d\uff0c\u600e\u4e48\u7406\u89e3\u4e00\u4e2a\u6574\u6570\u662ftrue\u6216false\" \/><\/p>\n<p><p>\u5728Python\u4e2d\uff0c<strong>\u6574\u6570\u7684\u771f\u503c\uff08True\u6216False\uff09\u7531\u5176\u503c\u51b3\u5b9a<\/strong>\uff1a\u4efb\u4f55\u975e\u96f6\u7684\u6574\u6570\u90fd\u88ab\u89c6\u4e3a<code>True<\/code>\uff0c\u800c\u6574\u6570<code>0<\/code>\u88ab\u89c6\u4e3a<code>False<\/code>\u3002\u8fd9\u4e00\u89c4\u5219\u53cd\u6620\u4e86\u591a\u6570\u7f16\u7a0b\u8bed\u8a00\u4e2d\u5e03\u5c14\u4e0a\u4e0b\u6587\u4e2d\u5bf9\u6574\u6570\u7684\u5904\u7406\u65b9\u5f0f\u3002\u4f8b\u5982\uff0c\u5f53\u4f7f\u7528\u6574\u6570\u4f5c\u4e3a\u6761\u4ef6\u8868\u8fbe\u5f0f\u65f6\uff0c\u5982\u5728<code>if<\/code>\u6216<code>while<\/code>\u8bed\u53e5\u4e2d\uff0c\u6574\u6570\u503c\u4f1a\u81ea\u52a8\u88ab\u89e3\u91ca\u4e3a\u5bf9\u5e94\u7684\u5e03\u5c14\u503c\u3002<strong>\u5728\u4f7f\u7528\u6574\u6570\u8fdb\u884c\u6761\u4ef6\u5224\u65ad\u65f6\uff0c\u96f6\u503c\u610f\u5473\u7740\u201c\u65e0\u201d\u6216\u201c\u7a7a\u201d\uff0c\u800c\u975e\u96f6\u503c\u5219\u8868\u793a\u5b58\u5728\u6027\u6216\u67d0\u79cd\u7a0b\u5ea6\u4e0a\u7684\u201c\u6ee1\u8db3\u6761\u4ef6\u201d\u3002<\/strong><\/p>\n<\/p>\n<p><h3>\u4e00\u3001\u5e03\u5c14\u4e0a\u4e0b\u6587\u4e2d\u7684\u6574\u6570<\/h3>\n<\/p>\n<p><p><strong>\u5728Python\u4e2d\u8fdb\u884c\u5e03\u5c14\u6d4b\u8bd5\u65f6\uff0c\u6240\u6709\u7684\u5bf9\u8c61\u90fd\u4f1a\u81ea\u52a8\u88ab\u8f6c\u6362\u4e3a\u5e03\u5c14\u503c<\/strong>\u3002\u5bf9\u4e8e\u6574\u6570\uff0c\u8fd9\u79cd\u8f6c\u6362\u8fc7\u7a0b\u9075\u5faa\u4e0a\u8ff0\u7684\u89c4\u5219\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7<code>bool()<\/code>\u51fd\u6570\u5c06\u6574\u6570\u663e\u5f0f\u8f6c\u6362\u4e3a\u5e03\u5c14\u503c\u6765\u89c2\u5bdf\u8fd9\u4e00\u8fc7\u7a0b\u3002<\/p>\n<\/p>\n<p><p><strong>\u5e03\u5c14\u503c\u4f5c\u4e3a\u6574\u6570\u7684\u4e00\u79cd\u7279\u6b8a\u60c5\u51b5<\/strong>\uff1a<\/p>\n<p>\u5728Python\u4e2d\uff0c\u5e03\u5c14\u7c7b\u578b\u5b9e\u9645\u4e0a\u662f\u6574\u6570\u7684\u5b50\u7c7b\uff0c<code>True<\/code>\u548c<code>False<\/code>\u5206\u522b\u7b49\u4ef7\u4e8e\u6574\u6570<code>1<\/code>\u548c<code>0<\/code>\u3002\u8fd9\u79cd\u8bbe\u8ba1\u5141\u8bb8\u5e03\u5c14\u503c\u5728\u9700\u8981\u6574\u6570\u7684\u5730\u65b9\u65e0\u7f1d\u64cd\u4f5c\uff0c\u4f8b\u5982\uff0c\u5728\u6570\u5b66\u8fd0\u7b97\u6216\u5217\u8868\u7d22\u5f15\u4e2d\u3002<\/p>\n<\/p>\n<p><h3>\u4e8c\u3001\u6761\u4ef6\u8bed\u53e5\u4e2d\u7684\u6574\u6570<\/h3>\n<\/p>\n<p><p>\u5728\u6761\u4ef6\u63a7\u5236\u8bed\u53e5\u4e2d\uff0c\u6574\u6570\u7ecf\u5e38\u88ab\u7528\u4f5c\u6761\u4ef6\u6765\u63a7\u5236\u7a0b\u5e8f\u6d41\u7a0b\u3002<\/p>\n<\/p>\n<p><p><strong>\u4f7f\u7528\u6574\u6570\u4f5c\u4e3a\u6761\u4ef6\u8868\u8fbe\u5f0f<\/strong>\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">number = 5<\/p>\n<p>if number:<\/p>\n<p>    # \u56e0\u4e3anumber\u662f\u975e\u96f6\u6574\u6570\uff0c\u6b64\u5904\u5224\u65ad\u4e3aTrue<\/p>\n<p>    print(&quot;Number is true&quot;)<\/p>\n<p>else:<\/p>\n<p>    print(&quot;Number is false&quot;)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p><strong>\u5229\u7528\u6574\u6570\u7684\u5e03\u5c14\u6027\u8d28\u8fdb\u884c\u5faa\u73af\u63a7\u5236<\/strong>\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">count = 3<\/p>\n<p>while count:<\/p>\n<p>    # \u56e0\u4e3acount\u521d\u59cb\u4e3a\u975e\u96f6\u6574\u6570\uff0c\u6b64\u5faa\u73af\u4f1a\u6267\u884c<\/p>\n<p>    print(&quot;Countdown:&quot;, count)<\/p>\n<p>    count -= 1<\/p>\n<h2><strong>\u5f53count\u53d8\u4e3a0\u65f6\uff0c\u5faa\u73af\u505c\u6b62<\/strong><\/h2>\n<p><\/code><\/pre>\n<\/p>\n<p><h3>\u4e09\u3001\u5b9e\u9645\u5e94\u7528\u4e2d\u7684\u771f\u503c\u6d4b\u8bd5<\/h3>\n<\/p>\n<p><p>\u5728\u5b9e\u9645\u7f16\u7a0b\u4e2d\uff0c\u5f00\u53d1\u8005\u4eec\u7ecf\u5e38\u4f1a\u7528\u5230\u6574\u6570\u7684\u771f\u503c\u6765\u7b80\u5316\u4ee3\u7801\u3002<\/p>\n<\/p>\n<p><p><strong>\u4f7f\u7528\u771f\u503c\u7b80\u5316\u6761\u4ef6\u5224\u65ad<\/strong>\uff1a<\/p>\n<p>\u5728\u5904\u7406\u5224\u5b9a\u903b\u8f91\u65f6\uff0c\u5229\u7528\u6574\u6570\u7684\u771f\u503c\u53ef\u4ee5\u4f7f\u4ee3\u7801\u66f4\u52a0\u7b80\u6d01\u6613\u8bfb\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">def can_proceed(num_tickets):<\/p>\n<p>    # \u5982\u679c\u8fd8\u6709\u7968\uff08num_tickets\u4e0d\u4e3a0\uff09\uff0c\u5219\u53ef\u4ee5\u7ee7\u7ec0\u6267\u884c<\/p>\n<p>    return bool(num_tickets)<\/p>\n<p>num_tickets = 0<\/p>\n<p>if can_proceed(num_tickets):<\/p>\n<p>    print(&quot;Let&#039;s proceed!&quot;)<\/p>\n<p>else:<\/p>\n<p>    print(&quot;Cannot proceed, no tickets left.&quot;)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u6b64\u51fd\u6570<code>can_proceed<\/code>\u4e2d\uff0c\u5229\u7528<code>num_tickets<\/code>\u7684\u771f\u503c\u76f4\u63a5\u8fd4\u56de\u5224\u65ad\u7ed3\u679c\uff0c\u7701\u53bb\u4e86\u989d\u5916\u7684\u6bd4\u8f83\u64cd\u4f5c\u3002<\/p>\n<\/p>\n<p><p><strong>\u5728\u5904\u7406\u6570\u503c\u5217\u8868\u65f6\u6709\u6548\u5229\u7528\u771f\u503c<\/strong>\uff1a<\/p>\n<p>\u5728\u904d\u5386\u6216\u5904\u7406\u5305\u542b\u6574\u6570\u7684\u5217\u8868\u65f6\uff0c\u771f\u503c\u5224\u65ad\u53ef\u4ee5\u7528\u6765\u7b5b\u9009\u975e\u96f6\u5143\u7d20\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">numbers = [0, 2, 3, 0, -1, 0]<\/p>\n<p>non_zero_numbers = [n for n in numbers if n]<\/p>\n<h2><strong>non_zero_numbers \u5c06\u53ea\u5305\u542b[2, 3, -1]<\/strong><\/h2>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5229\u7528\u5217\u8868\u63a8\u5bfc\u5f0f\u4e2d\u7684\u771f\u503c\u6d4b\u8bd5\uff0c\u4ee3\u7801\u66f4\u52a0\u76f4\u89c2\u5e76\u4e14\u5bb9\u6613\u7406\u89e3\u3002<\/p>\n<\/p>\n<p><h3>\u56db\u3001\u6ce8\u610f\u4e8b\u9879\u4e0e\u6700\u4f73\u5b9e\u8df5<\/h3>\n<\/p>\n<p><p>\u867d\u7136\u5229\u7528\u6574\u6570\u7684\u771f\u503c\u53ef\u4ee5\u4f7f\u4ee3\u7801\u7b80\u6d01\uff0c\u4f46\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u8fd9\u79cd\u505a\u6cd5\u53ef\u80fd\u5bfc\u81f4\u4ee3\u7801\u53ef\u8bfb\u6027\u548c\u660e\u786e\u6027\u964d\u4f4e\u3002<\/p>\n<\/p>\n<p><p><strong>\u907f\u514d\u5bf9\u4e8e0\u503c\u7684\u8bef\u89e3<\/strong>\uff1a<\/p>\n<p>\u5f53\u4e1a\u52a1\u903b\u8f91\u4e2d0\u5177\u6709\u7279\u5b9a\u610f\u4e49\u65f6\uff0c\u4ec5\u4ec5\u4f7f\u7528\u771f\u503c\u53ef\u80fd\u4f1a\u5f15\u8d77\u8bef\u89e3\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u660e\u786e\u5730\u4f7f\u7528\u6bd4\u8f83\u8bed\u53e5\uff08\u5982<code>num != 0<\/code>\uff09\u66f4\u4e3a\u5408\u9002\u3002<\/p>\n<\/p>\n<p><p><strong>\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u610f\u56fe\u6e05\u6670<\/strong>\uff1a<\/p>\n<p>\u5728\u56e2\u961f\u5408\u4f5c\u548c\u4ee3\u7801\u7ef4\u62a4\u7684\u8fc7\u7a0b\u4e2d\uff0c\u5e94\u8be5\u8003\u8651\u5230\u5176\u4ed6\u4eba\u5bf9\u4ee3\u7801\u7684\u7406\u89e3\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\"># \u4e0d\u63a8\u8350\uff0c\u610f\u56fe\u4e0d\u592a\u660e\u786e<\/p>\n<p>if num:<\/p>\n<p>    ...<\/p>\n<h2><strong>\u63a8\u8350\uff0c\u610f\u56fe\u6e05\u6670<\/strong><\/h2>\n<p>if num != 0:<\/p>\n<p>    ...<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u901a\u8fc7\u663e\u5f0f\u6bd4\u8f83\uff0c\u4ee3\u7801\u610f\u56fe\u6e05\u6670\uff0c\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u4e5f\u66f4\u9ad8\u3002<\/p>\n<\/p>\n<p><p>\u603b\u7ed3\u6765\u8bf4\uff0c\u5728Python\u4e2d\uff0c\u6574\u6570\u7684\u771f\u503c\u53d6\u51b3\u4e8e\u5176\u6570\u503c\u662f\u5426\u4e3a\u96f6\u3002\u867d\u7136\u8fd9\u79cd\u884c\u4e3a\u5728\u7f16\u5199\u7b80\u6d01\u4ee3\u7801\u65f6\u5341\u5206\u6709\u7528\uff0c\u4f46\u5728\u4fdd\u8bc1\u4ee3\u7801\u6e05\u6670\u8868\u8fbe\u610f\u56fe\u65b9\u9762\u4e5f\u9700\u8981\u8c28\u614e\u4f7f\u7528\u3002\u7406\u89e3\u548c\u9002\u5f53\u5730\u4f7f\u7528\u8fd9\u4e00\u7279\u6027\uff0c\u53ef\u4ee5\u63d0\u5347\u4ee3\u7801\u8d28\u91cf\u548c\u6267\u884c\u6548\u7387\u3002<\/p>\n<\/p>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p><strong>\u95ee\u98981\uff1a<\/strong> \u5982\u4f55\u5728Python\u4e2d\u5224\u65ad\u4e00\u4e2a\u6574\u6570\u662f\u5426\u4e3aTrue\u6216False\uff1f<\/p>\n<p><strong>\u56de\u7b54\uff1a<\/strong> \u5728Python\u4e2d\uff0c\u6574\u6570\u7c7b\u578b\u88ab\u89c6\u4e3a\u5e03\u5c14\u7c7b\u578b\u7684\u4e00\u79cd\uff0c\u6570\u5b570\u88ab\u89c6\u4e3aFalse\uff0c\u975e\u96f6\u6570\u5b57\u88ab\u89c6\u4e3aTrue\u3002\u56e0\u6b64\uff0c\u5224\u65ad\u4e00\u4e2a\u6574\u6570\u662f\u5426\u4e3aTrue\u6216False\u53ef\u4ee5\u901a\u8fc7\u7b80\u5355\u7684\u903b\u8f91\u6bd4\u8f83\u6765\u5b9e\u73b0\u3002\u5982\u679c\u6574\u6570\u7b49\u4e8e0\uff0c\u90a3\u4e48\u5b83\u662fFalse\uff1b\u5982\u679c\u6574\u6570\u4e0d\u7b49\u4e8e0\uff0c\u90a3\u4e48\u5b83\u662fTrue\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n<pre><code class=\"language-python\">num = 42\n\nif num == 0:\n    print(&quot;\u6574\u6570\u662fFalse&quot;)\nelse:\n    print(&quot;\u6574\u6570\u662fTrue&quot;)\n<\/code><\/pre>\n<p>\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6574\u657042\u4e0d\u7b49\u4e8e0\uff0c\u56e0\u6b64\u88ab\u89c6\u4e3aTrue\u3002<\/p>\n<p><strong>\u95ee\u98982\uff1a<\/strong> \u5728Python\u4e2d\uff0c\u5982\u4f55\u5224\u65ad\u4e00\u4e2a\u6574\u6570\u7684\u771f\u5047\u6027\u8d28\uff1f<\/p>\n<p><strong>\u56de\u7b54\uff1a<\/strong> \u5728Python\u4e2d\uff0c\u5224\u65ad\u4e00\u4e2a\u6574\u6570\u7684\u771f\u5047\u6027\u8d28\u662f\u901a\u8fc7\u5c06\u5176\u4e0e\u903b\u8f91\u64cd\u4f5c\u7b26\u8fdb\u884c\u6bd4\u8f83\u5b9e\u73b0\u7684\u3002\u6570\u503c0\u88ab\u89c6\u4e3aFalse\uff0c\u975e\u96f6\u6570\u5b57\u88ab\u89c6\u4e3aTrue\u3002\u56e0\u6b64\uff0c\u53ef\u4ee5\u4f7f\u7528\u903b\u8f91\u64cd\u4f5c\u7b26\u5bf9\u6574\u6570\u8fdb\u884c\u5224\u65ad\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u89c1\u7684\u5224\u65ad\u8868\u8fbe\u5f0f\uff1a<\/p>\n<ul>\n<li>\u5224\u65ad\u6574\u6570\u662f\u5426\u4e3a\u771f\uff08True\uff09\uff1a<code>if num:<\/code><\/li>\n<li>\u5224\u65ad\u6574\u6570\u662f\u5426\u4e3a\u5047\uff08False\uff09\uff1a<code>if not num:<\/code><\/li>\n<li>\u5224\u65ad\u6574\u6570\u662f\u5426\u4e3a\u6b63\u6570\uff1a<code>if num &gt; 0:<\/code><\/li>\n<li>\u5224\u65ad\u6574\u6570\u662f\u5426\u4e3a\u8d1f\u6570\uff1a<code>if num &lt; 0:<\/code><\/li>\n<li>\u5224\u65ad\u6574\u6570\u662f\u5426\u4e3a\u96f6\uff1a<code>if num == 0:<\/code><\/li>\n<\/ul>\n<p>\u901a\u8fc7\u8fd9\u4e9b\u5224\u65ad\u8868\u8fbe\u5f0f\uff0c\u53ef\u4ee5\u6839\u636e\u6574\u6570\u7684\u4e0d\u540c\u60c5\u51b5\u6765\u5224\u65ad\u5176\u771f\u5047\u6027\u8d28\u3002<\/p>\n<p><strong>\u95ee\u98983\uff1a<\/strong> \u5982\u4f55\u5728Python\u4e2d\u5224\u65ad\u4e00\u4e2a\u6574\u6570\u7684\u771f\u5047\u6027\u8d28\uff1f<\/p>\n<p><strong>\u56de\u7b54\uff1a<\/strong> \u5728Python\u4e2d\uff0c\u5224\u65ad\u4e00\u4e2a\u6574\u6570\u7684\u771f\u5047\u6027\u8d28\u662f\u975e\u5e38\u7b80\u5355\u7684\u3002\u53ea\u9700\u8981\u5c06\u6574\u6570\u4e0e\u903b\u8f91\u64cd\u4f5c\u7b26\u8fdb\u884c\u6bd4\u8f83\uff0c\u5c31\u53ef\u4ee5\u5f97\u5230\u5224\u65ad\u7ed3\u679c\u3002\u6839\u636ePython\u7684\u89c4\u5b9a\uff0c\u6570\u5b570\u88ab\u89c6\u4e3aFalse\uff0c\u975e\u96f6\u6574\u6570\u88ab\u89c6\u4e3aTrue\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5224\u65ad\u6574\u6570\u771f\u5047\u6027\u8d28\u7684\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n<pre><code class=\"language-python\">num = -10\n\nif num:\n    print(&quot;\u6574\u6570\u662fTrue&quot;)\nelse:\n    print(&quot;\u6574\u6570\u662fFalse&quot;)\n<\/code><\/pre>\n<p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6574\u6570-10\u4e0d\u7b49\u4e8e0\uff0c\u56e0\u6b64\u88ab\u89c6\u4e3aTrue\u3002<\/p>\n<p>\u901a\u8fc7\u7406\u89e3\u6574\u6570\u5728Python\u4e2d\u7684\u771f\u5047\u6027\u8d28\uff0c\u6211\u4eec\u53ef\u4ee5\u6839\u636e\u9700\u8981\u8fdb\u884c\u6761\u4ef6\u5224\u65ad\u548c\u903b\u8f91\u8fd0\u7b97\uff0c\u4f7f\u4ee3\u7801\u66f4\u52a0\u7075\u6d3b\u548c\u53ef\u8bfb\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5728Python\u4e2d\uff0c\u6574\u6570\u7684\u771f\u503c\uff08True\u6216False\uff09\u7531\u5176\u503c\u51b3\u5b9a\uff1a\u4efb\u4f55\u975e\u96f6\u7684\u6574\u6570\u90fd\u88ab\u89c6\u4e3aTrue\uff0c\u800c\u6574\u65700\u88ab\u89c6\u4e3a [&hellip;]","protected":false},"author":3,"featured_media":176867,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/176862"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=176862"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/176862\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/176867"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=176862"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=176862"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=176862"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}