{"id":1265,"date":"2014-08-04T13:25:06","date_gmt":"2014-08-04T05:25:06","guid":{"rendered":"http:\/\/blog.dayandcarrot.net\/?p=1265"},"modified":"2014-08-04T13:25:06","modified_gmt":"2014-08-04T05:25:06","slug":"python-format-string-%e8%bd%ac","status":"publish","type":"post","link":"https:\/\/dayandcarrot.space\/?p=1265","title":{"rendered":"python format string (\u8f6c)"},"content":{"rendered":"<p>\u6765\u6e90\u4e0d\u53ef\u8003<br \/>\n<span style=\"color: #4b4b4b;\">\u5728python\u4e2d\u4e5f\u6709\u7c7b\u4f3c\u4e8ec\u4e2d\u7684printf()\u7684\u683c\u5f0f\u8f93\u51fa\u6807\u8bb0\u3002\u5728python\u4e2d\u683c\u5f0f\u5316\u8f93\u51fa\u5b57\u7b26\u4e32\u4f7f\u7528\u7684\u662f%\u8fd0\u7b97\u7b26\uff0c\u901a\u7528\u7684\u5f62\u5f0f\u4e3a\u00a0<\/span><br style=\"color: #4b4b4b;\" \/><br style=\"color: #4b4b4b;\" \/><br style=\"color: #4b4b4b;\" \/><span style=\"color: #4b4b4b;\">\u683c\u5f0f\u6807\u8bb0\u5b57\u7b26\u4e32 % \u8981\u8f93\u51fa\u7684\u503c\u7ec4\u00a0<\/span><br style=\"color: #4b4b4b;\" \/><span style=\"color: #4b4b4b;\">\u5176\u4e2d\uff0c\u5de6\u8fb9\u90e8\u5206\u7684\u201d\u683c\u5f0f\u6807\u8bb0\u5b57\u7b26\u4e32\u201c\u53ef\u4ee5\u5b8c\u5168\u548cc\u4e2d\u7684\u4e00\u81f4\u3002\u53f3\u8fb9\u7684&#8217;\u503c\u7ec4&#8217;\u5982\u679c\u6709\u4e24\u4e2a\u53ca\u4ee5\u4e0a\u7684\u503c\u5219\u9700\u8981\u7528\u5c0f\u62ec\u53f7\u62ec\u8d77\u6765\uff0c\u4e2d\u95f4\u7528\u77ed\u53f7\u9694\u5f00\u3002\u91cd\u70b9\u6765\u770b\u5de6\u8fb9\u7684\u90e8\u5206\u3002\u5de6\u8fb9\u90e8\u5206\u7684\u6700\u7b80\u5355\u5f62\u5f0f\u4e3a\uff1a\u00a0<\/span><br style=\"color: #4b4b4b;\" \/><br style=\"color: #4b4b4b;\" \/><span style=\"color: #4b4b4b;\">%cdoe\u00a0<\/span><br style=\"color: #4b4b4b;\" \/><span style=\"color: #4b4b4b;\">\u5176\u4e2d\u7684code\u6709\u591a\u79cd\uff0c\u4e0d\u8fc7\u7531\u4e8e\u5728python\u4e2d\uff0c\u6240\u6709\u4e1c\u897f\u90fd\u53ef\u4ee5\u8f6c\u6362\u6210string\u7c7b\u578b\uff0c\u56e0\u6b64\uff0c\u5982\u679c\u6ca1\u6709\u4ec0\u4e48\u7279\u6b8a\u9700\u6c42\u5b8c\u5168\u53ef\u4ee5\u5168\u90e8\u4f7f\u7528\u2019%s\u2018\u6765\u6807\u8bb0\u3002\u6bd4\u5982\uff1a\u00a0<\/span><br style=\"color: #4b4b4b;\" \/><br style=\"color: #4b4b4b;\" \/><span style=\"color: #4b4b4b;\">&#8216;%s %s %s&#8217; % (1, 2.3, [&#8216;one&#8217;, &#8216;two&#8217;, &#8216;three&#8217;])\u00a0<\/span><br style=\"color: #4b4b4b;\" \/><span style=\"color: #4b4b4b;\">\u5b83\u7684\u8f93\u51fa\u4e3a&#8217;1 2.3 [&#8216;one&#8217;, &#8216;two&#8217;, &#8216;three&#8217;]&#8217;\uff0c\u5c31\u662f\u6309\u7167%\u5de6\u8fb9\u7684\u6807\u8bb0\u8f93\u51fa\u7684\u3002\u867d\u7136\u7b2c\u4e00\u4e2a\u548c\u7b2c\u4e8c\u503c\u4e0d\u662fstring\u7c7b\u578b\uff0c\u4e00\u6837\u6ca1\u6709\u95ee\u9898\u3002\u5728\u8fd9\u4e2a\u8fc7\u7a0b\u4e2d\uff0c\u5f53\u7535\u8111\u53d1\u73b0\u7b2c\u4e00\u4e2a\u503c\u4e0d\u662f%s \u65f6\uff0c\u4f1a\u5148\u8c03\u7528\u6574\u578b\u6570\u7684\u51fd\u6570\uff0c\u628a\u7b2c\u4e00\u4e2a\u503c\u4e5f\u5c31\u662f1\u8f6c\u6210string\u7c7b\u578b\uff0c\u7136\u540e\u518d\u8c03\u7528str()\u51fd\u6570\u6765\u8f93\u51fa\u3002\u524d\u9762\u8bf4\u8fc7\u8fd8\u6709\u4e00\u4e2arepr()\u51fd\u6570\uff0c\u5982\u679c\u8981\u7528\u8fd9\u4e2a \u51fd\u6570\uff0c\u53ef\u4ee5\u7528%r\u6765\u6807\u8bb0\u3002\u9664\u4e86%s\u5916\uff0c\u8fd8\u6709\u5f88\u591a\u7c7b\u4f3c\u7684code:\u00a0<\/span><br style=\"color: #4b4b4b;\" \/><br style=\"color: #4b4b4b;\" \/><span style=\"color: #4b4b4b;\">\u6574\u578b\u6570\uff1a%d\u00a0<\/span><br style=\"color: #4b4b4b;\" \/><span style=\"color: #4b4b4b;\">\u65e0\u7b26\u53f7\u6574\u578b\u6570\uff1a%u\u00a0<\/span><br style=\"color: #4b4b4b;\" \/><span style=\"color: #4b4b4b;\">\u516b\u8fdb\u5236\uff1a%o\u00a0<\/span><br style=\"color: #4b4b4b;\" \/><span style=\"color: #4b4b4b;\">\u5341\u516d\u8fdb\u5236\uff1a%x\u00a0\u00a0 %X\u00a0<\/span><br style=\"color: #4b4b4b;\" \/><span style=\"color: #4b4b4b;\">\u6d6e\u70b9\u6570\uff1a%f\u00a0<\/span><br style=\"color: #4b4b4b;\" \/><span style=\"color: #4b4b4b;\">\u79d1\u5b66\u8bb0\u6570\u6cd5: %e\u00a0\u00a0 %E\u00a0<\/span><br style=\"color: #4b4b4b;\" \/><span style=\"color: #4b4b4b;\">\u6839\u636e\u6570\u503c\u7684\u4e0d\u540c\u81ea\u52a8\u9009\u62e9%e\u6216%f: %g\u00a0<\/span><br style=\"color: #4b4b4b;\" \/><span style=\"color: #4b4b4b;\">\u6839\u636e\u6570\u503c\u7684\u4e0d\u540c\u81ea\u52a8\u9009\u62e9%E\u6216%f: %G\u00a0<\/span><br style=\"color: #4b4b4b;\" \/><span style=\"color: #4b4b4b;\">\u5c31\u8ddf\u524d\u9762\u8bf4\u7528\u8fdb\u884c\u8f6c\u4e49\u4e00\u6837\uff0c\u8fd9\u91cc\u7528%\u4f5c\u4e3a\u683c\u5f0f\u6807\u8bb0\u7684\u6807\u8bc6\uff0c\u4e5f\u6709\u4e00\u4e2a%\u672c\u8eab\u5e94\u8be5\u5982\u4f55\u8f93\u51fa\u7684\u95ee\u9898\u3002\u5982\u679c\u8981\u5728\u201d\u683c\u5f0f\u6807\u8bb0\u5b57\u7b26\u4e32\u201c\u4e2d\u8f93\u51fa%\u672c\u8eab\uff0c\u53ef\u4ee5\u7528%%\u6765\u8868\u793a\u3002\u00a0<\/span><br style=\"color: #4b4b4b;\" \/><span style=\"color: #4b4b4b;\">\u4e0a\u9762\u8bf4\u7684\u53ea\u662f\u683c\u5f0f\u6807\u8bb0\u7684\u6700\u7b80\u95f4\u7684\u5f62\u5f0f\uff0c\u6765\u770b\u590d\u6742\u4e00\u70b9\u7684\uff1a\u00a0<\/span><br style=\"color: #4b4b4b;\" \/><br style=\"color: #4b4b4b;\" \/><span style=\"color: #4b4b4b;\">\u2018%6.2f\u2019 % 1.235\u00a0<\/span><br style=\"color: #4b4b4b;\" \/><span style=\"color: #4b4b4b;\">\u5728\u8fd9\u79cd\u5f62\u5f0f\u4e2d\uff0c\u5728f\u7684\u524d\u9762\u51fa\u73b0\u4e86\u4e00\u4e2a\u7c7b\u4f3c\u5c0f\u6570\u76846.2\u5b83\u8868\u793a\u7684\u610f\u601d\u662f\uff0c\u603b\u5171\u8f93\u51fa\u7684\u957f\u5ea6\u4e3a6\u4e2a\u5b57\u7b26\uff0c\u5176\u4e2d\u5c0f\u65702\u4f4d\u3002\u8fd8\u6709\u66f4\u590d\u6742\u7684\uff1a\u00a0<\/span><br style=\"color: #4b4b4b;\" \/><br style=\"color: #4b4b4b;\" \/><span style=\"color: #4b4b4b;\">\u2018%06.2f\u2019 % 1.235\u00a0<\/span><br style=\"color: #4b4b4b;\" \/><span style=\"color: #4b4b4b;\">\u57286\u7684\u524d\u9762\u591a\u4e86\u4e00\u4e2a0,\u8868\u793a\u5982\u679c\u8f93\u51fa\u7684\u4f4d\u6570\u4e0d\u8db36\u4f4d\u5c31\u75280\u8865\u8db36\u4f4d\u3002\u8fd9\u4e00\u884c\u7684\u8f93\u51fa\u4e3a\u2018001.24\u2019\uff0c\u53ef\u4ee5\u770b\u5230\u5c0f\u6570\u4e5f\u5360\u7528\u4e00\u4f4d\u3002\u7c7b\u4f3c\u4e8e\u8fd9\u91cc0\u8fd9\u6837\u7684\u6807\u8bb0\u8fd8\u6709-\u3001+\u3002\u5176\u4e2d\uff0c-\u8868\u793a\u5de6\u5bf9\u9f50\uff0c+\u8868\u793a\u5728\u6b63\u6570\u524d\u9762\u4e5f\u6807\u4e0a+\u53f7\uff0c\u9ed8\u8ba4\u662f\u4e0d\u52a0\u7684\u3002\u6700\u540e\u6765\u770b\u6700\u590d\u6742\u7684\u5f62\u5f0f\uff1a\u00a0<\/span><br style=\"color: #4b4b4b;\" \/><br style=\"color: #4b4b4b;\" \/><span style=\"color: #4b4b4b;\">\u2018%(name)s:%(score)06.1f\u2019 %{&#8216;score&#8217;:9.5, &#8216;name&#8217;:&#8217;newsim&#8217;}\u00a0<\/span><br style=\"color: #4b4b4b;\" \/><span style=\"color: #4b4b4b;\">\u8fd9\u79cd\u5f62\u5f0f\u53ea\u7528\u5728\u8981\u8f93\u51fa\u7684\u5185\u5bb9\u4e3adictionary\uff08\u4e00\u79cdpython\u7684\u6570\u636e\u7c7b\u578b\uff09\u65f6\uff0c\u5c0f\u62ec\u53f7\u4e2d\u7684(name)\u548c(score)\u5bf9\u5e94\u4e8e\u540e\u9762\u7684\u952e\u503c \u5bf9\u4e2d\u7684\u952e\u3002\u524d\u9762\u7684\u4f8b\u5b50\u53ef\u4ee5\u770b\u5230\uff0c\u201d\u683c\u5f0f\u6807\u8bb0\u5b57\u7b26\u4e32\u201c\u4e2d\u6807\u8bb0\u7684\u987a\u5e8f\u548c&#8221;\u8981\u8f93\u51fa\u7684\u503c\u7ec4&#8221;\u4e2d\u7684\u503c\u662f\u4e00\u4e00\u5bf9\u5e94\u7684\uff0c\u6709\u987a\u5e8f\uff0c\u4e00\u5bf9\u4e00\uff0c\u4e8c\u5bf9\u4e8c\u3002\u800c\u5728\u8fd9\u79cd\u5f62\u5f0f\u4e2d\uff0c\u5219\u4e0d \u662f\uff0c\u6bcf\u4e2a\u683c\u5f0f\u6807\u8bb0\u5bf9\u5e94\u54ea\u4e2a\u503c\u7531\u5c0f\u62ec\u53f7\u4e2d\u7684\u952e\u6765\u6307\u5b9a\u3002\u8fd9\u884c\u4ee3\u7801\u7684\u8f93\u51fa\u4e3a\uff1a&#8217;newsim:0009.5&#8217;\u3002\u00a0<\/span><br style=\"color: #4b4b4b;\" \/><br style=\"color: #4b4b4b;\" \/><span style=\"color: #4b4b4b;\">\u6709\u65f6\u5019\u5728%6.2f\u8fd9\u79cd\u5f62\u5f0f\u4e2d\uff0c6\u548c2\u4e5f\u4e0d\u80fd\u4e8b\u5148\u6307\u5b9a\uff0c\u4f1a\u5728\u7a0b\u5e8f\u8fd0\u884c\u8fc7\u7a0b\u4e2d\u518d\u4ea7\u751f\uff0c\u90a3\u600e\u4e48\u8f93\u5165\u5462\uff0c\u5f53\u7136\u4e0d\u80fd\u7528%%d.%df\u6216%d.%d%f\u3002\u53ef \u4ee5\u7528%*.*f\u7684\u5f62\u5f0f\uff0c\u5f53\u7136\u5728\u540e\u9762\u7684\u201d\u8981\u8f93\u51fa\u7684\u503c\u7ec4\u201c\u4e2d\u5305\u542b\u90a3\u4e24\u4e2a*\u7684\u503c\u3002\u6bd4\u5982\uff1a&#8217;%*.*f&#8217; % (6, 2, 2.345)\u5c31\u76f8\u5f53\u4e8e&#8217;%6.2f&#8217; % 2.345\u3002\u00a0<\/span><br style=\"color: #4b4b4b;\" \/><br style=\"color: #4b4b4b;\" \/><span style=\"color: #4b4b4b;\">\u8fd9\u662f\u8fd9\u672c\u4e66\u5230\u6b64\u4e3a\u6b62\u770b\u8d77\u6765\u6700\u590d\u6742\u7684\u5185\u5bb9\u3002\u4e0d\u8fc7\u5982\u679c\u8bb0\u4e0d\u4f4f\uff0c\u6216\u4e0d\u60f3\u90a3\u4e48\u8010\u70e6\uff0c\u5b8c\u5168\u53ef\u4ee5\u5168\u90e8\u7528%s\u4ee3\u66ff\uff0c\u6216\u8005\u7528\u591a\u4e2a&#8221;+&#8221;\u6765\u6784\u9020\u7c7b\u4f3c\u7684\u8f93\u51fa\u5b57\u7b26\u4e32\u3002\u8fd9\u91cc\u7684%\u771f\u6709\u70b9\u9664\u6cd5\u7684\u5473\u9053\uff0c\u602a\u4e0d\u5f97\u8bbe\u8ba1\u8005\u4f1a\u9009\u62e9\u7528%\u8fd9\u4e2a\u9664\u53f7\u3002\u00a0<\/span><br style=\"color: #4b4b4b;\" \/><br style=\"color: #4b4b4b;\" \/><br style=\"color: #4b4b4b;\" \/><span style=\"color: #4b4b4b;\">\u8c61C \u4e2d\u7684sprintf\u51fd\u6570\u4e00\u6837\uff0c\u53ef\u4ee5\u7528\u201c%\u201d\u6765\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\u3002\u00a0<\/span><br style=\"color: #4b4b4b;\" \/><br style=\"color: #4b4b4b;\" \/><span style=\"color: #4b4b4b;\">Table 3.1. \u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u4ee3\u7801\u00a0<\/span><br style=\"color: #4b4b4b;\" \/><br style=\"color: #4b4b4b;\" \/><span style=\"color: #4b4b4b;\">\u683c\u5f0f \u63cf\u8ff0\u00a0<\/span><br style=\"color: #4b4b4b;\" \/><span style=\"color: #4b4b4b;\">%% \u767e\u5206\u53f7\u6807\u8bb0\u00a0<\/span><br style=\"color: #4b4b4b;\" \/><span style=\"color: #4b4b4b;\">%c \u5b57\u7b26\u53ca\u5176ASCII\u7801\u00a0<\/span><br style=\"color: #4b4b4b;\" \/><span style=\"color: #4b4b4b;\">%s \u5b57\u7b26\u4e32\u00a0<\/span><br style=\"color: #4b4b4b;\" \/><span style=\"color: #4b4b4b;\">%d \u6709\u7b26\u53f7\u6574\u6570(\u5341\u8fdb\u5236)\u00a0<\/span><br style=\"color: #4b4b4b;\" \/><span style=\"color: #4b4b4b;\">%u \u65e0\u7b26\u53f7\u6574\u6570(\u5341\u8fdb\u5236)\u00a0<\/span><br style=\"color: #4b4b4b;\" \/><span style=\"color: #4b4b4b;\">%o \u65e0\u7b26\u53f7\u6574\u6570(\u516b\u8fdb\u5236)\u00a0<\/span><br style=\"color: #4b4b4b;\" \/><span style=\"color: #4b4b4b;\">%x \u65e0\u7b26\u53f7\u6574\u6570(\u5341\u516d\u8fdb\u5236)\u00a0<\/span><br style=\"color: #4b4b4b;\" \/><span style=\"color: #4b4b4b;\">%X \u65e0\u7b26\u53f7\u6574\u6570(\u5341\u516d\u8fdb\u5236\u5927\u5199\u5b57\u7b26)\u00a0<\/span><br style=\"color: #4b4b4b;\" \/><span style=\"color: #4b4b4b;\">%e \u6d6e\u70b9\u6570\u5b57(\u79d1\u5b66\u8ba1\u6570\u6cd5)\u00a0<\/span><br style=\"color: #4b4b4b;\" \/><span style=\"color: #4b4b4b;\">%E \u6d6e\u70b9\u6570\u5b57(\u79d1\u5b66\u8ba1\u6570\u6cd5\uff0c\u7528E\u4ee3\u66ffe)\u00a0<\/span><br style=\"color: #4b4b4b;\" \/><span style=\"color: #4b4b4b;\">%f \u6d6e\u70b9\u6570\u5b57(\u7528\u5c0f\u6570\u70b9\u7b26\u53f7)\u00a0<\/span><br style=\"color: #4b4b4b;\" \/><span style=\"color: #4b4b4b;\">%g \u6d6e\u70b9\u6570\u5b57(\u6839\u636e\u503c\u7684\u5927\u5c0f\u91c7\u7528%e\u6216%f)\u00a0<\/span><br style=\"color: #4b4b4b;\" \/><span style=\"color: #4b4b4b;\">%G \u6d6e\u70b9\u6570\u5b57(\u7c7b\u4f3c\u4e8e%g)\u00a0<\/span><br style=\"color: #4b4b4b;\" \/><span style=\"color: #4b4b4b;\">%p \u6307\u9488(\u7528\u5341\u516d\u8fdb\u5236\u6253\u5370\u503c\u7684\u5185\u5b58\u5730\u5740)\u00a0<\/span><br style=\"color: #4b4b4b;\" \/><span style=\"color: #4b4b4b;\">%n \u5b58\u50a8\u8f93\u51fa\u5b57\u7b26\u7684\u6570\u91cf\u653e\u8fdb\u53c2\u6570\u5217\u8868\u7684\u4e0b\u4e00\u4e2a\u53d8\u91cf\u4e2d<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6765\u6e90\u4e0d\u53ef\u8003 \u5728python\u4e2d\u4e5f\u6709\u7c7b\u4f3c\u4e8ec\u4e2d\u7684printf()\u7684\u683c\u5f0f\u8f93\u51fa\u6807\u8bb0\u3002\u5728python\u4e2d\u683c\u5f0f\u5316\u8f93\u51fa\u5b57\u7b26\u4e32\u4f7f\u7528\u7684\u662f%\u8fd0\u7b97\u7b26\uff0c\u901a\u7528\u7684\u5f62\u5f0f\u4e3a\u00a0\u683c\u5f0f\u6807\u8bb0\u5b57\u7b26\u4e32 % 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