{"id":730,"date":"2025-03-01T07:58:04","date_gmt":"2025-02-28T23:58:04","guid":{"rendered":"http:\/\/www.cnitw.com\/?p=730"},"modified":"2025-03-01T08:03:51","modified_gmt":"2025-03-01T00:03:51","slug":"python%e7%bb%83%e4%b9%a03","status":"publish","type":"post","link":"http:\/\/www.cnitw.com\/?p=730","title":{"rendered":"python\u7ec3\u4e603"},"content":{"rendered":"\n<p>\u5c0fM\u5728\u5de5\u4f5c\u65f6\u9047\u5230\u4e86\u4e00\u4e2a\u95ee\u9898\uff0c\u4ed6\u9700\u8981\u5c06\u7528\u6237\u8f93\u5165\u7684\u4e0d\u5e26\u5343\u5206\u4f4d\u9017\u53f7\u7684\u6570\u5b57\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u5e26\u5343\u5206\u4f4d\u9017\u53f7\u7684\u683c\u5f0f\uff0c\u5e76\u4e14\u4fdd\u7559\u5c0f\u6570\u90e8\u5206\u3002\u5c0fM\u8fd8\u53d1\u73b0\uff0c\u6709\u65f6\u5019\u8f93\u5165\u7684\u6570\u5b57\u5b57\u7b26\u4e32\u524d\u9762\u4f1a\u6709\u65e0\u7528\u7684 0\uff0c\u8fd9\u4e9b\u4e5f\u9700\u8981\u7cbe\u7b80\u6389\u3002\u8bf7\u4f60\u5e2e\u52a9\u5c0fM\u7f16\u5199\u7a0b\u5e8f\uff0c\u5b8c\u6210\u8fd9\u4e2a\u4efb\u52a1\u3002<br><br>\u6d4b\u8bd5\u6837\u4f8b<br>\u6837\u4f8b1\uff1a<br><br>\u8f93\u5165\uff1as = &#8220;1294512.12412&#8221;<br>\u8f93\u51fa\uff1a&#8217;1,294,512.12412&#8242;<br><br>\u6837\u4f8b2\uff1a<br><br>\u8f93\u5165\uff1as = &#8220;0000123456789.99&#8221;<br>\u8f93\u51fa\uff1a&#8217;123,456,789.99&#8242;<br><br>\u6837\u4f8b3\uff1a<br><br>\u8f93\u5165\uff1as = &#8220;987654321&#8221;<br>\u8f93\u51fa\uff1a&#8217;987,654,321&#8242;<br><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>def add_commas(s):\n    # \u53bb\u9664\u524d\u9762\u65e0\u7528\u76840\n    s = s.lstrip('0')\n    if not s:\n        return '0'\n    # \u5224\u65ad\u662f\u5426\u6709\u5c0f\u6570\u90e8\u5206\n    if '.' in s:\n        integer_part, decimal_part = s.split('.')\n    else:\n        integer_part, decimal_part = s, ''\n    result = &#91;]\n    while integer_part:\n        result.insert(0, integer_part&#91;-3:])\n        integer_part = integer_part&#91;:-3]\n    integer_part_with_commas = ','.join(result)\n    if decimal_part:\n        return integer_part_with_commas + '.' + decimal_part\n    else:\n        return integer_part_with_commas\n\n\n# \u6d4b\u8bd5\ntest_cases = &#91;\"1294512.12412\", \"0000123456789.99\", \"987654321\"]\nfor s in test_cases:\n    print(add_commas(s))\n\u00a0\n \n\u4ee3\u7801\u89e3\u91ca\uff1a\n \n\u53bb\u9664\u524d\u5bfc\u96f6\uff1a\ns = s.lstrip('0')\nif not s:\n    return '0'\n\u00a0\n \n\u4f7f\u7528 \u00a0lstrip('0')\u00a0 \u65b9\u6cd5\u53bb\u9664\u5b57\u7b26\u4e32\u5f00\u5934\u7684\u6240\u6709\u96f6\u3002\u5982\u679c\u53bb\u9664\u96f6\u540e\u5b57\u7b26\u4e32\u4e3a\u7a7a\uff0c\u5219\u8fd4\u56de \u00a0'0'\u00a0\u3002\n\u5206\u79bb\u6574\u6570\u90e8\u5206\u548c\u5c0f\u6570\u90e8\u5206\uff1a\nif '.' in s:\n    integer_part, decimal_part = s.split('.')\nelse:\n    integer_part, decimal_part = s, ''\n\u00a0\n \n\u5224\u65ad\u5b57\u7b26\u4e32\u4e2d\u662f\u5426\u6709\u5c0f\u6570\u70b9\u3002\u5982\u679c\u6709\uff0c\u5219\u4f7f\u7528 \u00a0split('.')\u00a0 \u65b9\u6cd5\u5c06\u5b57\u7b26\u4e32\u5206\u4e3a\u6574\u6570\u90e8\u5206\u548c\u5c0f\u6570\u90e8\u5206\uff1b\u5982\u679c\u6ca1\u6709\uff0c\u5219\u5c0f\u6570\u90e8\u5206\u4e3a\u7a7a\u5b57\u7b26\u4e32\u3002\n\u6dfb\u52a0\u5343\u5206\u4f4d\u9017\u53f7\uff1a\nresult = &#91;]\nwhile integer_part:\n    result.insert(0, integer_part&#91;-3:])\n    integer_part = integer_part&#91;:-3]\ninteger_part_with_commas = ','.join(result)\n\u00a0\n \n\u4f7f\u7528\u5faa\u73af\uff0c\u6bcf\u6b21\u4ece\u6574\u6570\u90e8\u5206\u7684\u672b\u5c3e\u622a\u53d63\u4e2a\u5b57\u7b26\uff0c\u5e76\u5c06\u5176\u63d2\u5165\u5230 \u00a0result\u00a0 \u5217\u8868\u7684\u5f00\u5934\u3002\u5faa\u73af\u7ed3\u675f\u540e\uff0c\u4f7f\u7528 \u00a0join\u00a0 \u65b9\u6cd5\u5c06 \u00a0result\u00a0 \u5217\u8868\u4e2d\u7684\u5143\u7d20\u7528\u9017\u53f7\u8fde\u63a5\u8d77\u6765\u3002\n\u7ec4\u5408\u7ed3\u679c\uff1a\nif decimal_part:\n    return integer_part_with_commas + '.' + decimal_part\nelse:\n    return integer_part_with_commas\n\u00a0\n \n\u5982\u679c\u6709\u5c0f\u6570\u90e8\u5206\uff0c\u5219\u5c06\u5e26\u9017\u53f7\u7684\u6574\u6570\u90e8\u5206\u548c\u5c0f\u6570\u90e8\u5206\u7528\u5c0f\u6570\u70b9\u8fde\u63a5\u8d77\u6765\u8fd4\u56de\uff1b\u5982\u679c\u6ca1\u6709\u5c0f\u6570\u90e8\u5206\uff0c\u5219\u76f4\u63a5\u8fd4\u56de\u5e26\u9017\u53f7\u7684\u6574\u6570\u90e8\u5206\u3002\n\u6d4b\u8bd5\u90e8\u5206\uff1a\ntest_cases = &#91;\"1294512.12412\", \"0000123456789.99\", \"987654321\"]\nfor s in test_cases:\n    print(add_commas(s))\n\u00a0\n \n\u5b9a\u4e49\u6d4b\u8bd5\u7528\u4f8b\u5217\u8868\uff0c\u5e76\u5bf9\u6bcf\u4e2a\u6d4b\u8bd5\u7528\u4f8b\u8c03\u7528 \u00a0add_commas\u00a0 \u51fd\u6570\u5e76\u6253\u5370\u7ed3\u679c\u3002<\/code><\/pre>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p>\u2461<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>def add_commas(s):\n    # \u53bb\u9664\u524d\u9762\u65e0\u7528\u76840\n    s = s.lstrip('0')\n    if not s:\n        return '0'\n    if '.' in s:\n        integer_part, decimal_part = s.split('.')\n    else:\n        integer_part, decimal_part = s, ''\n    result = &#91;]\n    while integer_part:\n        result.append(integer_part&#91;-3:])\n        integer_part = integer_part&#91;:-3]\n    integer_part_with_commas = ','.join(reversed(result))\n    if decimal_part:\n        return integer_part_with_commas + '.' + decimal_part\n    else:\n        return integer_part_with_commas\n\n\n\u00a0\n \n\u4f60\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u5f0f\u8c03\u7528\u8fd9\u4e2a\u51fd\u6570\uff1a\n \ns = \"1294512.12412\"\nprint(add_commas(s))\ns = \"0000123456789.99\"\nprint(add_commas(s))\ns = \"987654321\"\nprint(add_commas(s))\n\u00a0\n \n\u4ee3\u7801\u8bf4\u660e\n \n\u53bb\u9664\u524d\u5bfc\u96f6\uff1a\u4f7f\u7528 \u00a0lstrip('0')\u00a0 \u65b9\u6cd5\u53bb\u9664\u5b57\u7b26\u4e32\u524d\u9762\u65e0\u7528\u7684 \u00a00\u00a0\u3002\u5982\u679c\u53bb\u9664\u540e\u5b57\u7b26\u4e32\u4e3a\u7a7a\uff0c\u5219\u8fd4\u56de \u00a0'0'\u00a0\u3002\n\u5206\u79bb\u6574\u6570\u90e8\u5206\u548c\u5c0f\u6570\u90e8\u5206\uff1a\u68c0\u67e5\u5b57\u7b26\u4e32\u4e2d\u662f\u5426\u5305\u542b\u5c0f\u6570\u70b9 \u00a0'.'\u00a0\uff0c\u5982\u679c\u5305\u542b\u5219\u4f7f\u7528 \u00a0split('.')\u00a0 \u65b9\u6cd5\u5c06\u5b57\u7b26\u4e32\u62c6\u5206\u4e3a\u6574\u6570\u90e8\u5206\u548c\u5c0f\u6570\u90e8\u5206\uff1b\u5982\u679c\u4e0d\u5305\u542b\uff0c\u5219\u6574\u6570\u90e8\u5206\u5c31\u662f\u6574\u4e2a\u5b57\u7b26\u4e32\uff0c\u5c0f\u6570\u90e8\u5206\u4e3a\u7a7a\u5b57\u7b26\u4e32\u3002\n\u5904\u7406\u6574\u6570\u90e8\u5206\u6dfb\u52a0\u5343\u5206\u4f4d\u9017\u53f7\uff1a\n- \u4f7f\u7528\u4e00\u4e2a\u5faa\u73af\uff0c\u6bcf\u6b21\u4ece\u6574\u6570\u90e8\u5206\u7684\u672b\u5c3e\u53d6\u51fa 3 \u4f4d\uff0c\u5e76\u5c06\u5176\u6dfb\u52a0\u5230\u4e00\u4e2a\u5217\u8868 \u00a0result\u00a0 \u4e2d\u3002\n- \u5faa\u73af\u7ed3\u675f\u540e\uff0c\u5c06 \u00a0result\u00a0 \u5217\u8868\u53cd\u8f6c\u5e76\u4f7f\u7528 \u00a0join\u00a0 \u65b9\u6cd5\u7528\u9017\u53f7\u8fde\u63a5\u8d77\u6765\uff0c\u5f62\u6210\u5e26\u5343\u5206\u4f4d\u9017\u53f7\u7684\u6574\u6570\u90e8\u5206\u3002\n\u7ec4\u5408\u7ed3\u679c\uff1a\u5982\u679c\u5b58\u5728\u5c0f\u6570\u90e8\u5206\uff0c\u5219\u5c06\u5e26\u5343\u5206\u4f4d\u9017\u53f7\u7684\u6574\u6570\u90e8\u5206\u548c\u5c0f\u6570\u90e8\u5206\u7528\u5c0f\u6570\u70b9\u8fde\u63a5\u8d77\u6765\u8fd4\u56de\uff1b\u5982\u679c\u4e0d\u5b58\u5728\u5c0f\u6570\u90e8\u5206\uff0c\u5219\u76f4\u63a5\u8fd4\u56de\u5e26\u5343\u5206\u4f4d\u9017\u53f7\u7684\u6574\u6570\u90e8\u5206\u3002<\/code><\/pre>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5c0fM\u5728\u5de5\u4f5c\u65f6\u9047\u5230\u4e86\u4e00\u4e2a\u95ee\u9898\uff0c\u4ed6\u9700\u8981\u5c06\u7528\u6237\u8f93\u5165\u7684\u4e0d\u5e26\u5343\u5206\u4f4d\u9017\u53f7\u7684\u6570\u5b57\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u5e26\u5343\u5206\u4f4d\u9017\u53f7\u7684\u683c\u5f0f\uff0c\u5e76\u4e14\u4fdd\u7559\u5c0f\u6570\u90e8\u5206\u3002\u5c0fM\u8fd8\u53d1\u73b0\uff0c\u6709\u65f6\u5019\u8f93\u5165\u7684\u6570\u5b57\u5b57\u7b26\u4e32\u524d\u9762\u4f1a\u6709\u65e0\u7528\u7684 0\uff0c\u8fd9\u4e9b\u4e5f\u9700\u8981\u7cbe\u7b80\u6389\u3002\u8bf7\u4f60\u5e2e\u52a9\u5c0fM\u7f16\u5199\u7a0b\u5e8f\uff0c\u5b8c\u6210\u8fd9\u4e2a\u4efb\u52a1\u3002 \u6d4b\u8bd5\u6837\u4f8b\u6837\u4f8b1\uff1a \u8f93\u5165\uff1as = &#8220;1294512.12412&#8221;\u8f93\u51fa\uff1a&#8217;1,294,512.12412&#8242; \u6837\u4f8b2\uff1a \u8f93\u5165\uff1as = &#8220;0000123456789.99&#8221;\u8f93\u51fa\uff1a&#8217;123,456,789.99&#8242; \u6837\u4f8b3\uff1a \u8f93\u5165\uff1as = &#8220;987654321&#8221;\u8f93\u51fa\uff1a&#8217;987,654,321&#8242; \u2461<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-730","post","type-post","status-publish","format-standard","hentry","category-python"],"_links":{"self":[{"href":"http:\/\/www.cnitw.com\/index.php?rest_route=\/wp\/v2\/posts\/730","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.cnitw.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.cnitw.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.cnitw.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.cnitw.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=730"}],"version-history":[{"count":3,"href":"http:\/\/www.cnitw.com\/index.php?rest_route=\/wp\/v2\/posts\/730\/revisions"}],"predecessor-version":[{"id":734,"href":"http:\/\/www.cnitw.com\/index.php?rest_route=\/wp\/v2\/posts\/730\/revisions\/734"}],"wp:attachment":[{"href":"http:\/\/www.cnitw.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=730"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.cnitw.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=730"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.cnitw.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=730"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}