{"id":2998,"date":"2025-06-01T16:25:39","date_gmt":"2025-06-04T09:12:38","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=2998"},"modified":"2025-06-04T16:25:39","modified_gmt":"2025-06-04T09:12:38","slug":"%e4%ba%86%e8%a7%a3python%e4%b8%adfloat%e5%87%bd%e6%95%b8%e7%9a%84%e5%8a%9f%e8%83%bd","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/python\/%e4%ba%86%e8%a7%a3python%e4%b8%adfloat%e5%87%bd%e6%95%b8%e7%9a%84%e5%8a%9f%e8%83%bd\/","title":{"rendered":"\u5168\u9762\u4e86\u89e3 Python \u4e2d float() \u51fd\u6578\u7684\u529f\u80fd\u8207\u61c9\u7528\uff082025 \u6700\u65b0\u6559\u5b78\uff09"},"content":{"rendered":"<p><meta name=\"keywords\" content=\"Python, float(), Python \u6559\u5b78, Python \u51fd\u6578\"><\/p>\n<h1>Python float() \u51fd\u6578<\/h1>\n<p>\u5728 Python \u4e2d\uff0c`float()` \u51fd\u6578\u662f\u4e00\u500b\u975e\u5e38\u5be6\u7528\u7684\u5de5\u5177\uff0c\u7528\u65bc\u5c07\u6578\u503c\u8f49\u63db\u70ba\u6d6e\u9ede\u6578\u3002\u7121\u8ad6\u662f\u6574\u6578\u3001\u6d6e\u9ede\u6578\uff0c\u751a\u81f3\u662f\u5b57\u7b26\u4e32\uff0c\u5b83\u90fd\u80fd\u8f15\u9b06\u8655\u7406\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e `float()` \u51fd\u6578\u7684\u8a9e\u6cd5\u3001\u53c3\u6578\u3001\u8fd4\u56de\u503c\u3001\u5be6\u4f5c\u7bc4\u4f8b\u53ca\u932f\u8aa4\u6392\u9664\uff0c\u4e26\u63d0\u4f9b\u6700\u4f73\u5be6\u8e10\u8207\u5ef6\u4f38\u61c9\u7528\uff0c\u8b93\u60a8\u80fd\u5920\u638c\u63e1 Python \u4e2d\u7684\u6578\u503c\u8f49\u63db\u3002<\/p>\n<h2>\u8a9e\u6cd5<\/h2>\n<pre class=\"brush: python\">\nfloat(x)\n<\/pre>\n<h2>\u53c3\u6578<\/h2>\n<ul>\n<li><strong>x<\/strong> &#8211; \u4efb\u4f55\u6578\u503c\uff0c\u9019\u53ef\u4ee5\u662f\u6574\u6578\u3001\u6d6e\u9ede\u6578\u3001\u5b57\u7b26\u4e32\uff0c\u6216\u5176\u4ed6\u53ef\u4ee5\u88ab\u8f49\u63db\u7684\u5c0d\u8c61\u3002<\/li>\n<\/ul>\n<h2>\u8fd4\u56de\u503c<\/h2>\n<p>`float()` \u51fd\u6578\u8fd4\u56de\u4e00\u500b\u6d6e\u9ede\u6578\uff0c\u82e5\u50b3\u5165\u7684\u53c3\u6578\u7121\u6cd5\u8f49\u63db\uff0c\u5247\u6703\u5f15\u767c\u932f\u8aa4\u3002<\/p>\n<h2>\u793a\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u793a\u4f8b\u5c55\u793a\u4e86 `float()` \u51fd\u6578\u7684\u4f7f\u7528\u65b9\u6cd5\uff1a<\/p>\n<pre class=\"brush: python\">\n# \u6574\u6578\nprint(float(5))  # \u8f38\u51fa: 5.0\n\n# \u6d6e\u9ede\u6578\nprint(float(11.22))  # \u8f38\u51fa: 11.22\n\n# \u5b57\u7b26\u4e32\nprint(float(\"-13.33\"))  # \u8f38\u51fa: -13.33\n<\/pre>\n<p>\u6b64\u5916\uff0c\u60a8\u9084\u53ef\u4ee5\u4f7f\u7528 `float()` \u51fd\u6578\u5c07\u5176\u4ed6\u5c0d\u8c61\u8f49\u63db\u70ba\u6d6e\u9ede\u6578\uff0c\u4f46\u9700\u6ce8\u610f\u5176\u9650\u5236\uff1a<\/p>\n<pre class=\"brush: python\">\n# \u5c07\u5217\u8868\u8f49\u63db\u70ba\u6d6e\u9ede\u6578\uff08\u6703\u5f15\u767c\u932f\u8aa4\uff09\nprint(float([1, 2, 3]))  # TypeError: float() argument must be a string or a number, not 'list'\n<\/pre>\n<p>\u7531\u65bc `float()` \u51fd\u6578\u53ea\u80fd\u63a5\u53d7\u5b57\u7b26\u4e32\u6216\u6578\u5b57\uff0c\u56e0\u6b64\u50b3\u905e\u4e0d\u7b26\u5408\u689d\u4ef6\u7684\u53c3\u6578\u5c07\u6703\u5f15\u767c\u932f\u8aa4\u3002<\/p>\n<h2>\u932f\u8aa4\u6392\u9664<\/h2>\n<p>\u5982\u679c\u60a8\u5728\u4f7f\u7528 `float()` \u51fd\u6578\u6642\u9047\u5230\u932f\u8aa4\uff0c\u53ef\u4ee5\u53c3\u8003\u4ee5\u4e0b\u5e7e\u9ede\uff1a<br \/>\n&#8211; \u78ba\u4fdd\u50b3\u5165\u7684\u53c3\u6578\u70ba\u53ef\u8f49\u63db\u7684\u683c\u5f0f\u3002<br \/>\n&#8211; \u5c0d\u65bc\u5b57\u7b26\u4e32\uff0c\u78ba\u8a8d\u5176\u5167\u5bb9\u662f\u6709\u6548\u7684\u6578\u5b57\u683c\u5f0f\u3002<br \/>\n&#8211; \u4f7f\u7528 `try&#8230;except` \u8a9e\u53e5\u4f86\u6355\u6349\u53ef\u80fd\u7684\u7570\u5e38\uff0c\u907f\u514d\u7a0b\u5e8f\u5d29\u6f70\u3002<\/p>\n<pre class=\"brush: python\">\ntry:\n    print(float(\"abc\"))  # \u5c07\u5f15\u767c ValueError\nexcept ValueError as e:\n    print(f\"\u932f\u8aa4: {e}\")\n<\/pre>\n<h2>float() \u51fd\u6578\u7684\u512a\u9ede<\/h2>\n<p>`float()` \u51fd\u6578\u7684\u6700\u5927\u512a\u9ede\u5728\u65bc\u5176\u9748\u6d3b\u6027\uff0c\u80fd\u5920\u63a5\u53d7\u591a\u7a2e\u6578\u64da\u985e\u578b\uff0c\u4e26\u4e14\u7121\u9700\u984d\u5916\u7684\u8f49\u63db\u64cd\u4f5c\u3002\u9019\u4f7f\u5f97\u5b83\u5728\u8655\u7406\u6578\u64da\u6642\u975e\u5e38\u65b9\u4fbf\uff0c\u7279\u5225\u662f\u5728\u6578\u64da\u6e05\u6d17\u548c\u8655\u7406\u904e\u7a0b\u4e2d\u3002<\/p>\n<h2>\u5ef6\u4f38\u61c9\u7528<\/h2>\n<p>\u5728\u6578\u64da\u5206\u6790\u548c\u79d1\u5b78\u8a08\u7b97\u4e2d\uff0c\u6d6e\u9ede\u6578\u7684\u4f7f\u7528\u975e\u5e38\u666e\u904d\u3002\u60a8\u53ef\u4ee5\u5c07 `float()` \u51fd\u6578\u8207\u5176\u4ed6\u6578\u64da\u8655\u7406\u5eab\uff08\u5982 NumPy\uff09\u7d50\u5408\uff0c\u4ee5\u5be6\u73fe\u66f4\u9ad8\u6548\u7684\u6578\u64da\u64cd\u4f5c\u3002\u4f8b\u5982\uff1a<\/p>\n<pre class=\"brush: python\">\nimport numpy as np\n\n# \u5c07\u4e00\u500b\u6574\u6578\u6578\u7d44\u8f49\u63db\u70ba\u6d6e\u9ede\u6578\u6578\u7d44\nint_array = np.array([1, 2, 3])\nfloat_array = int_array.astype(float)\nprint(float_array)  # \u8f38\u51fa: [1. 2. 3.]\n<\/pre>\n<h2>\u7e3d\u7d50<\/h2>\n<p>`float()` \u51fd\u6578\u662f\u4e00\u500b\u975e\u5e38\u6709\u7528\u7684\u51fd\u6578\uff0c\u80fd\u5920\u5c07\u4efb\u4f55\u6578\u503c\u8f49\u63db\u70ba\u6d6e\u9ede\u6578\uff0c\u8b93\u6578\u64da\u8655\u7406\u8b8a\u5f97\u66f4\u52a0\u9748\u6d3b\u8207\u9ad8\u6548\u3002\u638c\u63e1\u5176\u4f7f\u7528\u65b9\u6cd5\u548c\u6700\u4f73\u5be6\u8e10\uff0c\u5c07\u4f7f\u60a8\u5728 Python \u7de8\u7a0b\u4e2d\u66f4\u52a0\u6e38\u5203\u6709\u9918\u3002<\/p>\n<p>\u5982\u9700\u66f4\u6df1\u5165\u7684 Python \u6559\u5b78\u8207\u8cc7\u6e90\uff0c\u6b61\u8fce\u53c3\u8003 [Vocus \u7684 Python \u6559\u5b78](https:\/\/vocus.cc) \u6216 [Miner \u7684 Python \u5b78\u7fd2\u8cc7\u6e90](https:\/\/miner.tw)\u3002<\/p>\n<h2>Q&#038;A\uff08\u5e38\u898b\u554f\u984c\u89e3\u7b54\uff09<\/h2>\n<h3>1. float() \u51fd\u6578\u53ef\u4ee5\u63a5\u53d7\u54ea\u4e9b\u985e\u578b\u7684\u53c3\u6578\uff1f<\/h3>\n<p>`float()` \u51fd\u6578\u53ef\u4ee5\u63a5\u53d7\u6574\u6578\u3001\u6d6e\u9ede\u6578\u3001\u5b57\u7b26\u4e32\uff0c\u53ca\u5176\u4ed6\u53ef\u8f49\u63db\u70ba\u6d6e\u9ede\u6578\u7684\u5c0d\u8c61\u3002<\/p>\n<h3>2. \u4f7f\u7528 float() \u51fd\u6578\u6642\u767c\u751f\u932f\u8aa4\uff0c\u8a72\u5982\u4f55\u8655\u7406\uff1f<\/h3>\n<p>\u53ef\u4ee5\u4f7f\u7528 `try&#8230;except` \u8a9e\u53e5\u6355\u6349\u7570\u5e38\uff0c\u4e26\u6aa2\u67e5\u50b3\u5165\u7684\u53c3\u6578\u662f\u5426\u70ba\u6709\u6548\u7684\u6578\u5b57\u683c\u5f0f\u3002<\/p>\n<h3>3. \u70ba\u4ec0\u9ebc\u6211\u4e0d\u80fd\u5c07\u5217\u8868\u50b3\u905e\u7d66 float() \u51fd\u6578\uff1f<\/h3>\n<p>`float()` \u51fd\u6578\u50c5\u63a5\u53d7\u5b57\u7b26\u4e32\u6216\u6578\u5b57\uff0c\u50b3\u905e\u5217\u8868\u6703\u5f15\u767c TypeError\uff0c\u56e0\u70ba\u5217\u8868\u4e0d\u662f\u53ef\u8f49\u63db\u70ba\u6d6e\u9ede\u6578\u7684\u6709\u6548\u985e\u578b\u3002<br \/>\n&#8212;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>float()\u51fd\u6578\u53ef\u4ee5\u5c07\u6578\u5b57\u6216\u5b57\u4e32\u8f49\u63db\u70ba\u6d6e\u9ede\u6578\uff0c\u662fPython\u4e2d\u5e38\u7528\u7684\u6578\u5b57\u8f49\u63db\u51fd\u6578\uff0c\u672c\u6587\u5c07\u4ecb\u7d39float()\u51fd\u6578\u7684\u4f7f\u7528\u65b9\u6cd5\uff0c\u4ee5\u53ca\u5b83\u7684\u529f\u80fd\u548c\u512a\u9ede\u3002<\/p>\n","protected":false},"author":1,"featured_media":2518,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[18],"tags":[15],"class_list":["post-2998","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-python","tag-python"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/badgameshow.com\/steven\/wp-content\/uploads\/2022\/12\/DALL\u00b7E-2022-12-28-14.25.55-\u62f7\u8c9d2.png","jetpack-related-posts":[],"jetpack_shortlink":"https:\/\/wp.me\/pcFK27-Mm","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/2998","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/comments?post=2998"}],"version-history":[{"count":3,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/2998\/revisions"}],"predecessor-version":[{"id":12974,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/2998\/revisions\/12974"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media\/2518"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=2998"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=2998"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=2998"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}