{"id":1127290,"date":"2025-01-08T20:09:03","date_gmt":"2025-01-08T12:09:03","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1127290.html"},"modified":"2025-01-08T20:09:05","modified_gmt":"2025-01-08T12:09:05","slug":"python%e5%a6%82%e4%bd%95%e5%88%a4%e6%96%ad%e4%b8%80%e4%b8%aa%e6%95%b0%e6%98%af%e6%95%b4%e6%95%b0","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/1127290.html","title":{"rendered":"python\u5982\u4f55\u5224\u65ad\u4e00\u4e2a\u6570\u662f\u6574\u6570"},"content":{"rendered":"<p style=\"text-align:center;\" ><img decoding=\"async\" src=\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/25094342\/bd82155f-a1b2-45d3-b5b2-66486fc90acc.webp\" alt=\"python\u5982\u4f55\u5224\u65ad\u4e00\u4e2a\u6570\u662f\u6574\u6570\" \/><\/p>\n<p><p> <strong>Python \u5224\u65ad\u4e00\u4e2a\u6570\u662f\u5426\u4e3a\u6574\u6570\u7684\u65b9\u6cd5\u5305\u62ec\uff1a\u4f7f\u7528 <code>isinstance()<\/code> \u51fd\u6570\u3001\u5229\u7528 <code>float.is_integer()<\/code> \u65b9\u6cd5\u3001\u901a\u8fc7 <code>mod<\/code> \u8fd0\u7b97\u7b26\u3001\u4ee5\u53ca\u6b63\u5219\u8868\u8fbe\u5f0f\u7b49\u3002<\/strong> \u5176\u4e2d\uff0c\u6700\u5e38\u7528\u548c\u6700\u76f4\u89c2\u7684\u65b9\u6cd5\u662f\u4f7f\u7528 <code>isinstance()<\/code> \u51fd\u6570\u6765\u5224\u65ad\u3002<code>isinstance()<\/code> \u51fd\u6570\u53ef\u4ee5\u7528\u6765\u5224\u65ad\u4e00\u4e2a\u53d8\u91cf\u662f\u5426\u4e3a\u67d0\u4e2a\u7279\u5b9a\u7c7b\u578b\uff0c\u5176\u8bed\u6cd5\u7b80\u5355\u660e\u4e86\u3002\u4e0b\u9762\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u8fd9\u4e9b\u65b9\u6cd5\uff0c\u5e76\u901a\u8fc7\u5177\u4f53\u7684\u4f8b\u5b50\u6765\u6f14\u793a\u5176\u7528\u6cd5\u3002<\/p>\n<\/p>\n<p><h2>\u4e00\u3001\u4f7f\u7528 <code>isinstance()<\/code> \u51fd\u6570<\/h2>\n<\/p>\n<p><h3>1\u3001\u57fa\u672c\u7528\u6cd5<\/h3>\n<\/p>\n<p><p><code>isinstance()<\/code> \u51fd\u6570\u662f Python \u63d0\u4f9b\u7684\u4e00\u4e2a\u5185\u7f6e\u51fd\u6570\uff0c\u7528\u4e8e\u5224\u65ad\u4e00\u4e2a\u53d8\u91cf\u662f\u5426\u4e3a\u67d0\u4e2a\u7279\u5b9a\u7684\u7c7b\u578b\u3002\u5176\u8bed\u6cd5\u4e3a\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">isinstance(variable, type)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5176\u4e2d\uff0c<code>variable<\/code> \u662f\u9700\u8981\u68c0\u67e5\u7684\u53d8\u91cf\uff0c<code>type<\/code> \u662f\u9700\u8981\u5224\u65ad\u7684\u7c7b\u578b\u3002\u4f8b\u5982\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">num = 10<\/p>\n<p>print(isinstance(num, int))  # \u8f93\u51fa: True<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0c<code>num<\/code> \u662f\u4e00\u4e2a\u6574\u6570\uff0c\u56e0\u6b64 <code>isinstance(num, int)<\/code> \u8fd4\u56de <code>True<\/code>\u3002<\/p>\n<\/p>\n<p><h3>2\u3001\u5224\u65ad\u6d6e\u70b9\u6570\u662f\u5426\u4e3a\u6574\u6570<\/h3>\n<\/p>\n<p><p><code>isinstance()<\/code> \u51fd\u6570\u4e0d\u4ec5\u53ef\u4ee5\u5224\u65ad\u6574\u6570\u7c7b\u578b\uff0c\u8fd8\u53ef\u4ee5\u5224\u65ad\u5176\u4ed6\u7c7b\u578b\uff0c\u5982\u6d6e\u70b9\u6570\u3001\u5b57\u7b26\u4e32\u7b49\u3002\u5bf9\u4e8e\u6d6e\u70b9\u6570\uff0c\u53ef\u4ee5\u4f7f\u7528 <code>isinstance()<\/code> \u51fd\u6570\u7ed3\u5408 <code>float.is_integer()<\/code> \u65b9\u6cd5\u6765\u5224\u65ad\u662f\u5426\u4e3a\u6574\u6570\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">num = 10.0<\/p>\n<p>print(isinstance(num, float) and num.is_integer())  # \u8f93\u51fa: True<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u8fd9\u91cc\uff0c<code>is_integer()<\/code> \u65b9\u6cd5\u7528\u4e8e\u5224\u65ad\u6d6e\u70b9\u6570\u662f\u5426\u662f\u6574\u6570\u90e8\u5206\u3002<\/p>\n<\/p>\n<p><h2>\u4e8c\u3001\u5229\u7528 <code>float.is_integer()<\/code> \u65b9\u6cd5<\/h2>\n<\/p>\n<p><h3>1\u3001\u57fa\u672c\u7528\u6cd5<\/h3>\n<\/p>\n<p><p><code>float.is_integer()<\/code> \u65b9\u6cd5\u662f\u6d6e\u70b9\u6570\u5bf9\u8c61\u7684\u4e00\u4e2a\u65b9\u6cd5\uff0c\u7528\u4e8e\u5224\u65ad\u4e00\u4e2a\u6d6e\u70b9\u6570\u662f\u5426\u4e3a\u6574\u6570\u3002\u4f8b\u5982\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">num = 10.0<\/p>\n<p>print(num.is_integer())  # \u8f93\u51fa: True<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c<code>num<\/code> \u662f\u4e00\u4e2a\u6d6e\u70b9\u6570\uff0c\u4f46\u5b83\u7684\u503c\u662f\u4e00\u4e2a\u6574\u6570\uff0c\u56e0\u6b64 <code>num.is_integer()<\/code> \u8fd4\u56de <code>True<\/code>\u3002<\/p>\n<\/p>\n<p><h3>2\u3001\u7ed3\u5408\u7c7b\u578b\u5224\u65ad<\/h3>\n<\/p>\n<p><p>\u53ef\u4ee5\u5c06 <code>float.is_integer()<\/code> \u65b9\u6cd5\u548c\u7c7b\u578b\u5224\u65ad\u7ed3\u5408\u8d77\u6765\uff0c\u786e\u4fdd\u53d8\u91cf\u662f\u4e00\u4e2a\u6d6e\u70b9\u6570\uff0c\u5e76\u4e14\u5176\u503c\u662f\u6574\u6570\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">num = 10.0<\/p>\n<p>if isinstance(num, float) and num.is_integer():<\/p>\n<p>    print(&quot;num \u662f\u4e00\u4e2a\u6574\u6570&quot;)<\/p>\n<p>else:<\/p>\n<p>    print(&quot;num \u4e0d\u662f\u4e00\u4e2a\u6574\u6570&quot;)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h2>\u4e09\u3001\u901a\u8fc7 <code>mod<\/code> \u8fd0\u7b97\u7b26<\/h2>\n<\/p>\n<p><h3>1\u3001\u57fa\u672c\u7528\u6cd5<\/h3>\n<\/p>\n<p><p><code>mod<\/code> \u8fd0\u7b97\u7b26\uff08\u5373 <code>%<\/code>\uff09\u7528\u4e8e\u6c42\u4f59\u6570\u3002\u5982\u679c\u4e00\u4e2a\u6570\u9664\u4ee5\u53e6\u4e00\u4e2a\u6570\u4f59\u6570\u4e3a\u96f6\uff0c\u5219\u8bf4\u660e\u8fd9\u4e2a\u6570\u662f\u6574\u6570\u3002\u4f8b\u5982\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">num = 10.0<\/p>\n<p>if num % 1 == 0:<\/p>\n<p>    print(&quot;num \u662f\u4e00\u4e2a\u6574\u6570&quot;)<\/p>\n<p>else:<\/p>\n<p>    print(&quot;num \u4e0d\u662f\u4e00\u4e2a\u6574\u6570&quot;)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c<code>num<\/code> \u662f\u4e00\u4e2a\u6d6e\u70b9\u6570\uff0c\u4f46\u5176\u503c\u662f\u4e00\u4e2a\u6574\u6570\uff0c\u56e0\u6b64 <code>num % 1 == 0<\/code> \u8fd4\u56de <code>True<\/code>\u3002<\/p>\n<\/p>\n<p><h3>2\u3001\u7ed3\u5408\u7c7b\u578b\u5224\u65ad<\/h3>\n<\/p>\n<p><p>\u540c\u6837\uff0c\u53ef\u4ee5\u5c06 <code>mod<\/code> \u8fd0\u7b97\u7b26\u548c\u7c7b\u578b\u5224\u65ad\u7ed3\u5408\u8d77\u6765\uff0c\u786e\u4fdd\u53d8\u91cf\u662f\u4e00\u4e2a\u6570\u503c\u7c7b\u578b\uff0c\u5e76\u4e14\u5176\u503c\u662f\u6574\u6570\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">num = 10.0<\/p>\n<p>if (isinstance(num, int) or isinstance(num, float)) and num % 1 == 0:<\/p>\n<p>    print(&quot;num \u662f\u4e00\u4e2a\u6574\u6570&quot;)<\/p>\n<p>else:<\/p>\n<p>    print(&quot;num \u4e0d\u662f\u4e00\u4e2a\u6574\u6570&quot;)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h2>\u56db\u3001\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f<\/h2>\n<\/p>\n<p><h3>1\u3001\u57fa\u672c\u7528\u6cd5<\/h3>\n<\/p>\n<p><p>\u6b63\u5219\u8868\u8fbe\u5f0f\u662f\u4e00\u79cd\u5f3a\u5927\u7684\u6587\u672c\u5339\u914d\u5de5\u5177\uff0c\u53ef\u4ee5\u7528\u6765\u5224\u65ad\u4e00\u4e2a\u5b57\u7b26\u4e32\u662f\u5426\u8868\u793a\u4e00\u4e2a\u6574\u6570\u3002\u4f8b\u5982\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">import re<\/p>\n<p>num_str = &quot;10&quot;<\/p>\n<p>if re.match(r&quot;^-?\\d+$&quot;, num_str):<\/p>\n<p>    print(&quot;num_str \u662f\u4e00\u4e2a\u6574\u6570&quot;)<\/p>\n<p>else:<\/p>\n<p>    print(&quot;num_str \u4e0d\u662f\u4e00\u4e2a\u6574\u6570&quot;)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6b63\u5219\u8868\u8fbe\u5f0f <code>r&quot;^-?\\d+$&quot;<\/code> \u7528\u4e8e\u5339\u914d\u6574\u6570\uff0c\u5176\u4e2d <code>^-?<\/code> \u8868\u793a\u53ef\u9009\u7684\u8d1f\u53f7\uff0c<code>\\d+<\/code> \u8868\u793a\u4e00\u4e2a\u6216\u591a\u4e2a\u6570\u5b57\uff0c<code>$<\/code> \u8868\u793a\u5b57\u7b26\u4e32\u7684\u7ed3\u5c3e\u3002<\/p>\n<\/p>\n<p><h3>2\u3001\u7ed3\u5408\u7c7b\u578b\u8f6c\u6362<\/h3>\n<\/p>\n<p><p>\u53ef\u4ee5\u5c06\u6b63\u5219\u8868\u8fbe\u5f0f\u548c\u7c7b\u578b\u8f6c\u6362\u7ed3\u5408\u8d77\u6765\uff0c\u786e\u4fdd\u53d8\u91cf\u662f\u4e00\u4e2a\u5b57\u7b26\u4e32\uff0c\u5e76\u4e14\u5176\u503c\u662f\u6574\u6570\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">import re<\/p>\n<p>num_str = &quot;10&quot;<\/p>\n<p>if isinstance(num_str, str) and re.match(r&quot;^-?\\d+$&quot;, num_str):<\/p>\n<p>    num = int(num_str)<\/p>\n<p>    print(&quot;num \u662f\u4e00\u4e2a\u6574\u6570&quot;)<\/p>\n<p>else:<\/p>\n<p>    print(&quot;num_str \u4e0d\u662f\u4e00\u4e2a\u6574\u6570&quot;)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h2>\u4e94\u3001\u603b\u7ed3<\/h2>\n<\/p>\n<p><p>\u5728 Python \u4e2d\uff0c\u6709\u591a\u79cd\u65b9\u6cd5\u53ef\u4ee5\u7528\u6765\u5224\u65ad\u4e00\u4e2a\u6570\u662f\u5426\u4e3a\u6574\u6570\uff0c\u5305\u62ec <code>isinstance()<\/code> \u51fd\u6570\u3001<code>float.is_integer()<\/code> \u65b9\u6cd5\u3001<code>mod<\/code> \u8fd0\u7b97\u7b26\u548c\u6b63\u5219\u8868\u8fbe\u5f0f\u7b49\u3002\u6bcf\u79cd\u65b9\u6cd5\u90fd\u6709\u5176\u4f18\u70b9\u548c\u9002\u7528\u573a\u666f\uff0c\u53ef\u4ee5\u6839\u636e\u5177\u4f53\u60c5\u51b5\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\u3002\u65e0\u8bba\u662f\u5904\u7406\u6574\u6570\u7c7b\u578b\u3001\u6d6e\u70b9\u6570\u7c7b\u578b\uff0c\u8fd8\u662f\u5b57\u7b26\u4e32\u7c7b\u578b\uff0c\u90fd\u53ef\u4ee5\u901a\u8fc7\u5408\u7406\u7ec4\u5408\u8fd9\u4e9b\u65b9\u6cd5\u6765\u5b9e\u73b0\u7cbe\u786e\u7684\u5224\u65ad\u3002<\/p>\n<\/p>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p> <strong>\u5982\u4f55\u5728Python\u4e2d\u5224\u65ad\u4e00\u4e2a\u6570\u7684\u7c7b\u578b\uff1f<\/strong><br \/>\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u5185\u7f6e\u7684<code>type()<\/code>\u51fd\u6570\u6765\u68c0\u67e5\u4e00\u4e2a\u6570\u7684\u7c7b\u578b\u3002\u4f8b\u5982\uff0c<code>type(x) == int<\/code>\u53ef\u4ee5\u7528\u6765\u5224\u65ad\u53d8\u91cf<code>x<\/code>\u662f\u5426\u4e3a\u6574\u6570\u3002\u6b64\u65b9\u6cd5\u9002\u7528\u4e8e\u4efb\u4f55\u6570\u636e\u7c7b\u578b\uff0c\u80fd\u591f\u6709\u6548\u786e\u8ba4\u6570\u503c\u7684\u7c7b\u578b\u3002<\/p>\n<p><strong>\u662f\u5426\u53ef\u4ee5\u901a\u8fc7\u5176\u4ed6\u65b9\u6cd5\u6765\u5224\u65ad\u4e00\u4e2a\u6570\u662f\u6574\u6570\uff1f<\/strong><br \/>\u9664\u4e86\u4f7f\u7528<code>type()<\/code>\u51fd\u6570\u5916\uff0c\u8fd8\u53ef\u4ee5\u4f7f\u7528<code>isinstance()<\/code>\u51fd\u6570\u6765\u5224\u65ad\u4e00\u4e2a\u6570\u662f\u5426\u662f\u6574\u6570\u3002\u6bd4\u5982\uff0c<code>isinstance(x, int)<\/code>\u8fd4\u56de<code>True<\/code>\u8868\u793a<code>x<\/code>\u662f\u6574\u6570\uff0c\u8fd4\u56de<code>False<\/code>\u5219\u8868\u793a<code>x<\/code>\u4e0d\u662f\u6574\u6570\u3002\u8fd9\u79cd\u65b9\u6cd5\u66f4\u52a0\u7075\u6d3b\uff0c\u56e0\u4e3a\u5b83\u53ef\u4ee5\u68c0\u67e5\u4e00\u4e2a\u6570\u662f\u5426\u662f\u67d0\u4e2a\u7c7b\u578b\u7684\u5b50\u7c7b\u3002<\/p>\n<p><strong>\u5728Python\u4e2d\uff0c\u5982\u4f55\u5904\u7406\u6d6e\u70b9\u6570\u548c\u6574\u6570\u7684\u6bd4\u8f83\uff1f<\/strong><br \/>\u5728\u8fdb\u884c\u6d6e\u70b9\u6570\u4e0e\u6574\u6570\u7684\u6bd4\u8f83\u65f6\uff0c\u9700\u8981\u6ce8\u610f\u7cbe\u5ea6\u95ee\u9898\u3002\u53ef\u4ee5\u4f7f\u7528<code>math.isclose()<\/code>\u51fd\u6570\u6765\u6bd4\u8f83\u4e24\u4e2a\u6570\u662f\u5426\u76f8\u7b49\uff0c\u5c24\u5176\u662f\u5728\u5904\u7406\u6d6e\u70b9\u6570\u65f6\u3002\u8fd9\u79cd\u65b9\u5f0f\u53ef\u4ee5\u907f\u514d\u7531\u4e8e\u6d6e\u70b9\u6570\u8868\u793a\u4e0d\u7cbe\u786e\u800c\u5bfc\u81f4\u7684\u6bd4\u8f83\u9519\u8bef\u3002\u901a\u8fc7\u8fd9\u79cd\u65b9\u6cd5\uff0c\u53ef\u4ee5\u786e\u4fdd\u5224\u65ad\u66f4\u4e3a\u51c6\u786e\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"Python \u5224\u65ad\u4e00\u4e2a\u6570\u662f\u5426\u4e3a\u6574\u6570\u7684\u65b9\u6cd5\u5305\u62ec\uff1a\u4f7f\u7528 isinstance() \u51fd\u6570\u3001\u5229\u7528 float.is_i 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