{"id":3040,"date":"2025-05-31T16:58:06","date_gmt":"2025-06-04T09:05:05","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=3040"},"modified":"2025-06-04T16:58:06","modified_gmt":"2025-06-04T09:05:05","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-2","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-2\/","title":{"rendered":"\u6df1\u5165\u4e86\u89e3 Python \u4e2d\u7684 float() \u51fd\u6578\uff1a2025 \u6700\u65b0\u8a9e\u6cd5\u8207\u6700\u4f73\u5be6\u8e10"},"content":{"rendered":"<p><meta name=\"keywords\" content=\"Python, float(), Python \u6559\u5b78, Python \u7a0b\u5f0f\u8a2d\u8a08\"><\/p>\n<h1>Python float() \u51fd\u6578\uff1a\u6df1\u5165\u4e86\u89e3\u8207\u5be6\u4f5c<\/h1>\n<h2>\u4ec0\u9ebc\u662f float() \u51fd\u6578\uff1f<\/h2>\n<p>Python \u7684 `float()` \u51fd\u6578\u662f\u4e00\u500b\u5167\u5efa\u51fd\u6578\uff0c\u7528\u65bc\u5c07\u6574\u6578\u3001\u5b57\u4e32\u6216\u5176\u4ed6\u6578\u5b57\u8f49\u63db\u70ba\u6d6e\u9ede\u6578\u3002\u9019\u5c0d\u65bc\u6578\u5b78\u8a08\u7b97\u548c\u6578\u64da\u8655\u7406\u975e\u5e38\u91cd\u8981\uff0c\u56e0\u70ba\u6d6e\u9ede\u6578\u53ef\u4ee5\u8868\u793a\u66f4\u5ee3\u6cdb\u7684\u6578\u503c\u7bc4\u570d\u3002\u7576\u8f38\u5165\u7684\u53c3\u6578\u7121\u6cd5\u8f49\u63db\u6642\uff0c\u8a72\u51fd\u6578\u6703\u5f15\u767c `TypeError` \u6216 `ValueError` \u4f8b\u5916\u3002<\/p>\n<h2>\u8a9e\u6cd5<\/h2>\n<p>&#8220;`python<br \/>\nfloat(x)<br \/>\n&#8220;`<\/p>\n<h2>\u53c3\u6578<\/h2>\n<ul>\n<li><strong>x<\/strong> &#8211; \u53ef\u4ee5\u662f\u4efb\u4f55\u6578\u5b57\u6216\u5b57\u4e32\uff0c\u7528\u65bc\u8f49\u63db\u70ba\u6d6e\u9ede\u6578\u3002<\/li>\n<\/ul>\n<h2>\u8fd4\u56de\u503c<\/h2>\n<p>`float()` \u51fd\u6578\u8fd4\u56de\u4e00\u500b\u6d6e\u9ede\u6578\uff0c\u5982\u679c\u8f49\u63db\u5931\u6557\uff0c\u5247\u5f15\u767c\u76f8\u61c9\u7684\u4f8b\u5916\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<p>&#8220;`python<br \/>\n# \u6574\u6578<br \/>\nprint(float(5))        # \u8f38\u51fa 5.0<\/p>\n<p># \u6d6e\u9ede\u6578<br \/>\nprint(float(11.22))    # \u8f38\u51fa 11.22<\/p>\n<p># \u5b57\u4e32<br \/>\nprint(float(&#8220;-13.33&#8221;)) # \u8f38\u51fa -13.33<\/p>\n<p># \u7a7a\u5b57\u4e32<br \/>\ntry:<br \/>\n    print(float(&#8220;&#8221;))<br \/>\nexcept ValueError as e:<br \/>\n    print(&#8220;Error:&#8221;, e)  # \u5c07\u5f15\u767c ValueError<br \/>\n&#8220;`<\/p>\n<p>\u57f7\u884c\u4ee5\u4e0a\u7a0b\u5f0f\uff0c\u60a8\u6703\u89c0\u5bdf\u5230\u4ee5\u4e0b\u7d50\u679c\uff1a<\/p>\n<p>&#8220;`plaintext<br \/>\n5.0<br \/>\n11.22<br \/>\n-13.33<br \/>\nError: could not convert string to float:<br \/>\n&#8220;`<\/p>\n<p>\u5f9e\u9019\u500b\u7d50\u679c\u4e2d\uff0c\u6211\u5011\u53ef\u4ee5\u770b\u5230 `float()` \u51fd\u6578\u80fd\u5920\u5c07\u6574\u6578\u3001\u6d6e\u9ede\u6578\u548c\u5b57\u4e32\u6210\u529f\u8f49\u63db\u70ba\u6d6e\u9ede\u6578\u3002\u7136\u800c\uff0c\u7576\u53c3\u6578\u70ba\u7a7a\u5b57\u4e32\u6642\uff0c\u5247\u6703\u5f15\u767c `ValueError` \u4f8b\u5916\u3002<\/p>\n<h2>\u61c9\u7528<\/h2>\n<p>`float()` \u51fd\u6578\u53ef\u4ee5\u7528\u65bc\u6578\u5b57\u8a08\u7b97\u548c\u6bd4\u8f03\uff0c\u4f8b\u5982\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u5b83\u4f86\u6bd4\u8f03\u5169\u500b\u6578\u5b57\u7684\u5927\u5c0f\uff1a<\/p>\n<p>&#8220;`python<br \/>\nx = 5<br \/>\ny = 10<\/p>\n<p>if float(x) > float(y):<br \/>\n    print(&#8220;x is greater than y&#8221;)<br \/>\nelse:<br \/>\n    print(&#8220;x is not greater than y&#8221;)<br \/>\n&#8220;`<\/p>\n<p>\u57f7\u884c\u4ee5\u4e0a\u7a0b\u5f0f\uff0c\u5f97\u5230\u4ee5\u4e0b\u7d50\u679c\uff1a<\/p>\n<p>&#8220;`plaintext<br \/>\nx is not greater than y<br \/>\n&#8220;`<\/p>\n<p>\u6b64\u5916\uff0c`float()` \u51fd\u6578\u4e5f\u53ef\u7528\u65bc\u8a08\u7b97\u6578\u5b57\u7684\u5e73\u5747\u503c\uff1a<\/p>\n<p>&#8220;`python<br \/>\n# \u6578\u5b57\u5217\u8868<br \/>\nnums = [5, 10, 15, 20]\n<p># \u8a08\u7b97\u5e73\u5747\u503c<br \/>\navg = sum(float(num) for num in nums) \/ len(nums)<\/p>\n<p>print(&#8220;Average:&#8221;, avg)<br \/>\n&#8220;`<\/p>\n<p>\u57f7\u884c\u4ee5\u4e0a\u7a0b\u5f0f\uff0c\u60a8\u5c07\u770b\u5230\u4ee5\u4e0b\u7d50\u679c\uff1a<\/p>\n<p>&#8220;`plaintext<br \/>\nAverage: 12.5<br \/>\n&#8220;`<\/p>\n<h2>\u932f\u8aa4\u6392\u9664<\/h2>\n<p>\u7576\u4f7f\u7528 `float()` \u51fd\u6578\u6642\uff0c\u5e38\u898b\u7684\u932f\u8aa4\u5305\u62ec\uff1a<br \/>\n1. **ValueError**\uff1a\u8a66\u5716\u5c07\u7121\u6cd5\u8f49\u63db\u7684\u5b57\u4e32\uff08\u5982&#8221;abc&#8221;\u6216\u7a7a\u5b57\u4e32\uff09\u50b3\u905e\u7d66 `float()`\u3002<br \/>\n2. **TypeError**\uff1a\u50b3\u905e\u975e\u6578\u5b57\u6216\u5b57\u4e32\u7684\u985e\u578b\uff08\u5982\u5217\u8868\u6216\u5b57\u5178\uff09\u6642\u6703\u51fa\u73fe\u6b64\u932f\u8aa4\u3002<\/p>\n<p>\u70ba\u4e86\u907f\u514d\u9019\u4e9b\u932f\u8aa4\uff0c\u5efa\u8b70\u5728\u8f49\u63db\u4e4b\u524d\u6aa2\u67e5\u8f38\u5165\u7684\u985e\u578b\u548c\u5167\u5bb9\u3002<\/p>\n<h2>\u5ef6\u4f38\u61c9\u7528<\/h2>\n<p>`float()` \u51fd\u6578\u5728\u6578\u64da\u79d1\u5b78\u548c\u6a5f\u5668\u5b78\u7fd2\u4e2d\u7d93\u5e38\u88ab\u4f7f\u7528\u3002\u4f8b\u5982\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u5b83\u5c07\u8f38\u5165\u6578\u64da\u8f49\u63db\u70ba\u6d6e\u9ede\u6578\uff0c\u4ee5\u4fbf\u9032\u884c\u6578\u64da\u8655\u7406\u548c\u6a21\u578b\u8a13\u7df4\u3002\u95dc\u65bc\u5982\u4f55\u5728\u6578\u64da\u5206\u6790\u4e2d\u4f7f\u7528 Python\uff0c\u60a8\u53ef\u4ee5\u53c3\u8003 [\u9019\u7bc7\u6559\u5b78\u6587\u7ae0](https:\/\/vocus.cc\/article\/60e2f7a6fd89780001b1f5f3) \u4ee5\u7372\u53d6\u66f4\u591a\u8cc7\u8a0a\u3002<\/p>\n<h2>\u7e3d\u7d50<\/h2>\n<p>`float()` \u51fd\u6578\u662f\u4e00\u500b\u5f37\u5927\u4e14\u9748\u6d3b\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5c07\u6578\u5b57\u6216\u5b57\u4e32\u8f49\u63db\u70ba\u6d6e\u9ede\u6578\uff0c\u4e26\u53ef\u7528\u65bc\u8a08\u7b97\u548c\u6bd4\u8f03\u6578\u5b57\u3002\u638c\u63e1 `float()` \u51fd\u6578\u7684\u4f7f\u7528\u5c0d\u65bc Python \u7a0b\u5f0f\u8a2d\u8a08\u548c\u6578\u64da\u5206\u6790\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n<h2>Q&#038;A\uff08\u5e38\u898b\u554f\u984c\u89e3\u7b54\uff09<\/h2>\n<h3>1. float() \u51fd\u6578\u80fd\u5426\u8655\u7406\u79d1\u5b78\u8a18\u6578\u6cd5\u7684\u5b57\u4e32\uff1f<\/h3>\n<p>\u662f\u7684\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528 `float()` \u51fd\u6578\u4f86\u8f49\u63db\u79d1\u5b78\u8a18\u6578\u6cd5\u7684\u5b57\u4e32\uff0c\u4f8b\u5982 `&#8221;1e3&#8243;` \u5c07\u6703\u88ab\u8f49\u63db\u70ba `1000.0`\u3002<\/p>\n<h3>2. \u5982\u679c\u50b3\u905e\u4e00\u500b\u5217\u8868\u7d66 float() \u6703\u600e\u6a23\uff1f<\/h3>\n<p>\u5c07\u6703\u5f15\u767c `TypeError`\uff0c\u56e0\u70ba `float()` \u4e0d\u80fd\u76f4\u63a5\u8655\u7406\u5217\u8868\u4f5c\u70ba\u8f38\u5165\u3002<\/p>\n<h3>3. float() \u51fd\u6578\u6709\u4ec0\u9ebc\u61c9\u7528\u5834\u666f\uff1f<\/h3>\n<p>`float()` \u51fd\u6578\u5e38\u7528\u65bc\u6578\u64da\u8f49\u63db\u3001\u8a08\u7b97\u5e73\u5747\u503c\u3001\u6578\u5b57\u6bd4\u8f03\u7b49\u5834\u666f\uff0c\u5c24\u5176\u5728\u6578\u64da\u5206\u6790\u548c\u79d1\u5b78\u8a08\u7b97\u4e2d\u975e\u5e38\u91cd\u8981\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-3040","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-N2","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3040","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=3040"}],"version-history":[{"count":3,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3040\/revisions"}],"predecessor-version":[{"id":12952,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3040\/revisions\/12952"}],"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=3040"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=3040"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=3040"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}