{"id":393,"date":"2013-03-24T22:12:25","date_gmt":"2013-03-25T02:12:25","guid":{"rendered":"http:\/\/zhanxw.com\/blog\/?p=393"},"modified":"2013-03-24T22:12:26","modified_gmt":"2013-03-25T02:12:26","slug":"pycon2013-%e6%9c%89%e6%84%8f%e6%80%9d%e7%9a%84%e5%b9%bb%e7%81%af","status":"publish","type":"post","link":"https:\/\/zhanxw.com\/blog\/2013\/03\/pycon2013-%e6%9c%89%e6%84%8f%e6%80%9d%e7%9a%84%e5%b9%bb%e7%81%af\/","title":{"rendered":"PyCon2013 \u6709\u610f\u601d\u7684\u5e7b\u706f"},"content":{"rendered":"<p>Interesting slides from PyCon 2013<br \/>\n\u4eca\u5e74PyCon\u5728\u52a0\u5dde\u7684Santa Clara\u53ec\u5f00\u3002\u6211\u867d\u7136\u6ca1\u53bb\uff0c\u4f46\u4e00\u5982\u65e2\u5f80\u7684\u5173\u5fc3\u3002<br \/>\n\u6311\u51fa\u548c\u6211\u76f8\u5173\u7684\u4e00\u4e9b\u6709\u610f\u601d\u7684\u5e7b\u706f\uff0c\u5728\u6b64\u5206\u4eab\u3002<\/p>\n<p>1. <a href=\"http:\/\/zhanxw.com\/blog\/2013\/03\/pycon2013-%e6%9c%89%e6%84%8f%e6%80%9d%e7%9a%84%e5%b9%bb%e7%81%af\/beautifulcode_2\/\" rel=\"attachment wp-att-394\">BeautifulCode<\/a><br \/>\nRaymond Hettinger\u662f\u4e00\u4e2a\u5584\u7528Python\u7684\u9ad8\u624b\uff0c\u4ed6\u7684code\u975e\u5e38\u7b80\u6d01\uff0c\u6709Python\u7684\u98ce\u5473\u3002<br \/>\n\u8fd9\u4e2a\u5e7b\u706f\u91cc\uff0c\u4ed6\u4ecb\u7ecd\u5f88\u591aPython\u4e2d\u5e38\u7528\u7684\u7b80\u6d01\u7684\u5199\u6cd5\uff0c\u5305\u62ec\u600e\u4e48\u7528iterator\uff0c list comprehension.<br \/>\n\u6211\u611f\u89c9\u6709\u610f\u601d\u7684\u662fdefaultDict \uff08\u4e0d\u9700\u8981\u518d\u7528dict.get()), decorator\uff08\u4fee\u9970\u65b9\u6cd5\uff0c\u7c7b\u6bd4CSS\uff09\u548ccontext\uff08\u5e72\u51c0\u7684\u83b7\u53d6\u548c\u91ca\u653e\u8d44\u6e90\uff09<\/p>\n<p><a href=\"https:\/\/speakerdeck.com\/pyconslides\/pythons-class-development-toolkit-by-raymond-hettinger\" target=\"_blank\">\u539f\u59cb\u94fe\u63a5<\/a><\/p>\n<p>2. <a href=\"https:\/\/speakerd.s3.amazonaws.com\/presentations\/45bf1e5070c20130504c1231393df3e9\/PyMillTalk.pdf\" title=\"Python: A \"Toy\"  Language\" target=\"_blank\">Python: A &#8220;Toy&#8221; Language<\/a><\/p>\n<p>David Beazley\u662f\u4e00\u4e2aPython\u4f5c\u5bb6\uff0c\u5bf9Python GIL\u6709\u8fc7\u8be6\u7ec6\u7684\u4ecb\u7ecd\uff0c\u4ee5\u524d\u5199\u8fc7\u5982\u4f55\u628aGenerator\u7ec4\u5408\u6210\u4e00\u4e2aworkflow\u7684\u5e7b\u706f\u3002<br \/>\n\u73b0\u5728\u5728\u829d\u52a0\u54e5\u6559Python\u3002\u8fd9\u4e2a\u4eba\u64c5\u957fPython\u7684\u6559\u5b66\uff0c\u5e76\u80fd\u7ed9\u51fa\u6709\u8da3\u7684\u4f8b\u5b50\u3002\u8fd9\u6b21\u4e5f\u4e0d\u4f8b\u5916\uff0c\u4ed6\u4ecb\u7ecd\u4e86\u5982\u4f55\u7528Python\u548cShapeoko \uff08\u5305\u62ecArduino\uff09\u6765\u7ec4\u88c5\u5e76\u4f7f\u7528CNC \uff08\u6570\u63a7\u673a\u5e8a\uff1f\uff09\u3002\u8fd9\u4e2a\u4f8b\u5b50\u544a\u8bc9\u6211\u4eecPython\u53ef\u4ee5\u505a\u8ba1\u7b97\u673a\u7a0b\u5e8f\u4e4b\u5916\u5f88\u6709\u7528\u7684 \u5e94\u7528\u3002<\/p>\n<p><a href=\"https:\/\/speakerdeck.com\/pyconslides\/python-a-toy-language-by-david-beazley\" title=\"\u539f\u59cb\u94fe\u63a5\" target=\"_blank\">\u539f\u59cb\u94fe\u63a5<\/a><\/p>\n<p>3. <a href=\"https:\/\/speakerd.s3.amazonaws.com\/presentations\/d0e55b306ff20130792122000a1d8862\/2013_PyCon_awesome_Big_Data_algorithms.pptx.pdf\" title=\"Awesome\tBig\tData\tAlgorithms\t\" target=\"_blank\">Awesome\tBig\tData\tAlgorithms<br \/>\n<\/a><\/p>\n<p>\u4f5c\u8005\u662fMSU\u7684\u8001\u5e08\u3002\u8fd9\u4e2aBlog\u7684\u80cc\u666f\u662f\u571f\u58e4Genetics\u3002\u56e0\u4e3a\u571f\u58e4\u4e2d\u7684genetics\u6bd4\u5355\u7eaf\u4eba\u7684DNA\u66f4\u590d\u6742\uff0c\u6570\u636e\u91cf\u66f4\u5927\uff0c\u56e0\u6b64\u9700\u8981Big Data Algorithm\u3002\u8fd9\u4e2a\u5e7b\u706f\u4ecb\u7ecd\u4e09\u79cd\u7b97\u6cd5\uff1aSkipList, HyperLogLog, Bloom filter\uff08CountMin Sketch\uff09\u3002<\/p>\n<p>SkipList\u662f\u4e00\u79cd\u57fa\u4e8e\u94fe\u8868\u7684\u6570\u636e\u7ed3\u6784\uff0c\u76f8\u5bf9\u7fbd\u5e73\u8861\u4e8c\u53c9\u6811\uff0c\u8fd9\u4e2a\u7b97\u6cd5\u7684\u4f18\u70b9\u662f\u66f4\u597d\u7684\u652f\u6301\u5e76\u53d1\u64cd\u4f5c\u3002\u672c\u8d28\u4e0a\uff0cSkipList\u662f\u4e00\u4e2a\u5206\u5c42\u6b21\u7684\u94fe\u8868\u3002\u5728\u6700\u5e95\u5c42\uff0c\u94fe\u8868\u5143\u7d20\u6309\u987a\u5e8f\u6392\u5217\u3002\u5728\u66f4\u9ad8\u7684\u5c42\u6b21\uff0c\uff08\u6309\u7167\u6982\u7387\uff09\u7b80\u5386\u4e00\u90e8\u5206\u4f4e\u5c42\u7684\u6570\u636e\u7684\u7d22\u5f15\u3002\u8fd9\u79cd\u6570\u636e\u7ed3\u6784\u5728\u67e5\u627e\u65f6\u975e\u5e38\u6709\u6548\uff1a\u4ece\u9ad8\u5c42\u5f00\u59cb\u67e5\u627e\uff0c\u76f4\u5230\u6700\u5e95\u5c42\u987a\u5e8f\u67e5\u627e\uff0c\u6574\u4e2a\u67e5\u627e\u662flog\uff08N\uff09<\/p>\n<p>HyperLogLog\u662f\u5e94\u7528\u4e8e\u5927\u6570\u636e\u7684\u7b97\u6cd5\uff0c\u7528\u6765\u8ba1\u7b97\u4e00\u4e2a\u5f88\u5927\u96c6\u5408\u7684\u57fa\u6570\uff08\u5373\u5408\u7406\u603b\u5171\u6709\u591a\u5c11\u4e0d\u76f8\u540c\u7684\u5143\u7d20\uff09\u3002\u5927\u81f4\u601d\u8def\u662f\u7528\u4e00\u7ec4\u76f8\u4e92\u72ec\u7acb\u7684\u54c8\u5e0c\u51fd\u6570\u4f9d\u6b21\u5904\u7406\u8f93\u5165\uff0c\u7136\u540e\u5bf9\u54c8\u5e0c\u503c\u5206\u5757\u8ba1\u6570\uff1a\u5bf9\u9ad8\u4f4d\u7edf\u8ba1\u6709\u591a\u5c11\u8fde\u7eed\u76840\uff1b\u7528\u4f4e\u4f4d\u7684\u503c\u5f53\u505a\u6570\u636e\u5757\u3002\u6bd4\u5982:011000|01\uff0c\u5c31\u662f\u9ad8\u4f4d\u67093\u4e2a\u8fde\u7eed\u76840\uff0c\u4f4e\u4f4d\u662f1\uff0c\u5c31\u8868\u793a\u7b2c\u4e00\u4e2a\u6570\u636e\u5757\u3002\u56e0\u4e3a\u8fde\u7eed\u89c2\u6d4b\u7684\u4e09\u4e2a0\u7684\u6982\u7387\u5927\u7ea6\u662f1\/8\uff0c\u6240\u4ee5\u5bf9\u6570\u636e\u57571\u6765\u8bb2\uff0c\u53ef\u4ee5\u628a\b\u8ba1\u6570\u4e588\uff0c\u4f5c\u4e3a\u96c6\u5408\u57fa\u6570\u7684\u4f30\u8ba1\u3002\u56e0\u4e3a\u4f4e\u4f4d\u53ef\u80fd\u67090\uff0c1\uff0c2\uff0c3\u8fd9\u56db\u79cd\u6570\u503c\uff0c\u603b\u57fa\u6570\u53ef\u4ee5\u53d6\u4e0a\u8ff04\u4e2d\u6280\u672f\u7684\u51e0\u4f55\u5e73\u5747\u6570\u3002\u5728HyperLogLog\u4e2d\uff0c\u5177\u4f53\u7684\u8fd8\u6709\u4e00\u4e9b\u7cfb\u6570\u53ef\u4ee5\u8c03\u6574\uff0c\u4f7f\u5f97\u4f30\u8ba1\u66f4\u51c6\u786e\u3002<br \/>\n\u8fd9\u7247<a href=\"http:\/\/blog.aggregateknowledge.com\/2012\/10\/25\/sketch-of-the-day-hyperloglog-cornerstone-of-a-big-data-infrastructure\/\" target=\"_blank\">Blog<\/a>\u8be6\u7ec6\u4ecb\u7ecd\u4e86HyperLogLog\u7b97\u6cd5\uff0c\u56fe\u6587\u5e76\u8302\u3002<\/p>\n<p>BloomFilter\u6216CountMin Sketch\u662f\u4e24\u4e2a\u4e0d\u540c\u7684\u7b97\u6cd5\uff0c\u4f46\u53c8\u6709\u7d27\u5bc6\u8054\u7cfb\u3002\u76f8\u4f3c\u4e4b\u5904\u662f\u4e24\u4e2a\u7b97\u6cd5\u90fd\u9700\u8981\u4e00\u65cf\u72ec\u7acb\u7684\u54c8\u5e0c\u51fd\u6570\u3002\u4e0d\u540c\u4e4b\u5904\u662f\u5904\u7406\u7684\u95ee\u9898\u4e0d\u540c\u3002\u5bf9BloomFilter,\u5728\u9884\u5904\u7406\u9636\u6bb5\u5bf9\u6bcf\u4e00\u4e2a\u7279\u5b9a\u7684\u8f93\u5165\u7b97\u51fa\u6240\u6709\u54c8\u5e0c\u51fd\u6570\u7684\u503c\uff0c\u5e76\u5728\u8fd9\u4e9b\u503c\u4e0a\u505a\u51fa\u6807\u8bb0\u3002\u6700\u540e\uff0c\u5f53\u67e5\u627e\u4e00\u4e2a\u7279\u5b9a\u7684\u8f93\u5165\u662f\u5426\u51fa\u73b0\u8fc7\uff0c\u53ea\u9700\u67e5\u627e\u8fd9\u4e00\u7cfb\u5217\u7684\u54c8\u5e0c\u51fd\u6570\u5bf9\u5e94\u503c\u4e0a\u6709\u6ca1\u6709\u6807\u8bb0\u3002\u5bf9\u4e8eBloomFilter\uff0c\u53ef\u80fd\u6709False Positive\uff0c\u4f46\u4e0d\u53ef\u80fd\u6709False Negative\u3002\u6b64\u5916\uff0cBloomFilter\u53ef\u770b\u505a\u67e5\u627e\u4e00\u4e2a\u6570\u636e\u6709\u6216\u8005\u6ca1\u6709\u7684\u6570\u636e\u7ed3\u6784\uff08\u6570\u636e\u7684\u9891\u7387\u662f\u5426\u5927\u4e8e1\uff09\u3002CountMin Sketch\u5728BloomFilter\u7684\u57fa\u7840\u4e0a\u66f4\u8fdb\u4e00\u6b65\uff0c\u5b83\u53ef\u7528\u6765\u4f30\u7b97\u67d0\u4e00\u4e2a\u8f93\u5165\u7684\u9891\u7387\uff08\u4e0d\u5c40\u9650\u4e8e\u5927\u4e8e1\uff09\u3002\u5177\u4f53\u601d\u8def\u662f\u5bf9\u54c8\u5e0c\u51fd\u6570\u503c\u5bf9\u5e94\u7684sketch\u4e0a\u8ba1\u6570\uff08\u5bf9BloomFilter\u5219\u53ea\u662f\u6807\u8bb0\u662f\u6216\u5426\uff09\u3002\u6700\u540e\u4f30\u8ba1\u9891\u7387\u7684\u65f6\u5019\uff0c\u5bf9\u6bcf\u4e2a\u4f30\u7b97\u51fa\u7684\u9891\u7387\u53d6\u6700\u5c0f\u503c\u3002<\/p>\n<p><a href=\"https:\/\/speakerdeck.com\/pyconslides\/awesome-big-data-algorithms-by-titus-brown\" title=\"\u539f\u59cb\u94fe\u63a5\" target=\"_blank\">\u539f\u59cb\u94fe\u63a5<\/a><\/p>\n<p>4. <a href=\"https:\/\/speakerd.s3.amazonaws.com\/presentations\/d435ac9070970130297b22000a1d8b6d\/Text-Processing-3.pdf\" title=\"Why you should use Python 3 for text processing\" target=\"_blank\">Why you should use Python 3 for text processing<\/a><\/p>\n<p>\u8fd9\u4e2a\u8bb2\u5ea7\u5173\u6ce8\u7684Python3\uff0c\u800c\u4e0d\u662f\u73b0\u5728\u6211\u4f7f\u7528\u7684Python2.7.3\u3002\u4f46\u5728Python\u793e\u533a\uff0c\u6709\u65f6\u597d\u7684\u529f\u80fd\u4f1a\u4ece\u7248\u672c3\u79fb\u690d\u56de\u7248\u672c2\u3002<br \/>\n\u8fd9\u4e2a\u8bb2\u5ea7\u4ecb\u7ecd\u4e86Python3\u91cc\u9762\u7684\u65b0\u529f\u80fd\uff0c\u4f8b\u5982ChainMap\uff0cstartswith\uff08tuple\u4f5c\u4e3a\u53c2\u6570\uff09\uff0cunicode\u652f\u6301\uff0ctextwrap\u6a21\u5757\uff08\u53ef\u4ee5\u65b9\u4fbf\u7684\u6392\u7248\uff09\u548cemail\u6a21\u5757\u3002<\/p>\n<p><a href=\"https:\/\/speakerdeck.com\/pyconslides\/why-you-should-use-python-3-for-text-processing-by-david-mertz\" title=\"\u539f\u59cb\u94fe\u63a5\" target=\"_blank\">\u539f\u59cb\u94fe\u63a5<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Interesting slides from PyCon 2013 \u4eca\u5e74PyCon\u5728\u52a0\u5dde\u7684Santa Clara\u53ec\u5f00\u3002\u6211\u867d\u7136\u6ca1\u53bb\uff0c\u4f46\u4e00\u5982\u65e2\u5f80\u7684\u5173\u5fc3\u3002 \u6311\u51fa\u548c\u6211\u76f8\u5173\u7684\u4e00\u4e9b\u6709\u610f\u601d\u7684\u5e7b\u706f\uff0c\u5728\u6b64\u5206\u4eab\u3002 1. BeautifulCode Raymond Hettinger\u662f\u4e00\u4e2a\u5584\u7528Python\u7684\u9ad8\u624b\uff0c\u4ed6\u7684code\u975e\u5e38\u7b80\u6d01\uff0c\u6709Python\u7684\u98ce\u5473\u3002 \u8fd9\u4e2a\u5e7b\u706f\u91cc\uff0c\u4ed6\u4ecb\u7ecd\u5f88\u591aPython\u4e2d\u5e38\u7528\u7684\u7b80\u6d01\u7684\u5199\u6cd5\uff0c\u5305\u62ec\u600e\u4e48\u7528iterator\uff0c list comprehension. \u6211\u611f\u89c9\u6709\u610f\u601d\u7684\u662fdefaultDict \uff08\u4e0d\u9700\u8981\u518d\u7528dict.get()), decorator\uff08\u4fee\u9970\u65b9\u6cd5\uff0c\u7c7b\u6bd4CSS\uff09\u548ccontext\uff08\u5e72\u51c0\u7684\u83b7\u53d6\u548c\u91ca\u653e\u8d44\u6e90\uff09 \u539f\u59cb\u94fe\u63a5 2. Python: A &#8220;Toy&#8221; Language David Beazley\u662f\u4e00\u4e2aPython\u4f5c\u5bb6\uff0c\u5bf9Python GIL\u6709\u8fc7\u8be6\u7ec6\u7684\u4ecb\u7ecd\uff0c\u4ee5\u524d\u5199\u8fc7\u5982\u4f55\u628aGenerator\u7ec4\u5408\u6210\u4e00\u4e2aworkflow\u7684\u5e7b\u706f\u3002 \u73b0\u5728\u5728\u829d\u52a0\u54e5\u6559Python\u3002\u8fd9\u4e2a\u4eba\u64c5\u957fPython\u7684\u6559\u5b66\uff0c\u5e76\u80fd\u7ed9\u51fa\u6709\u8da3\u7684\u4f8b\u5b50\u3002\u8fd9\u6b21\u4e5f\u4e0d\u4f8b\u5916\uff0c\u4ed6\u4ecb\u7ecd\u4e86\u5982\u4f55\u7528Python\u548cShapeoko \uff08\u5305\u62ecArduino\uff09\u6765\u7ec4\u88c5\u5e76\u4f7f\u7528CNC \uff08\u6570\u63a7\u673a\u5e8a\uff1f\uff09\u3002\u8fd9\u4e2a\u4f8b\u5b50\u544a\u8bc9\u6211\u4eecPython\u53ef\u4ee5\u505a\u8ba1\u7b97\u673a\u7a0b\u5e8f\u4e4b\u5916\u5f88\u6709\u7528\u7684 \u5e94\u7528\u3002 \u539f\u59cb\u94fe\u63a5 3. Awesome Big Data Algorithms \u4f5c\u8005\u662fMSU\u7684\u8001\u5e08\u3002\u8fd9\u4e2aBlog\u7684\u80cc\u666f\u662f\u571f\u58e4Genetics\u3002\u56e0\u4e3a\u571f\u58e4\u4e2d\u7684genetics\u6bd4\u5355\u7eaf\u4eba\u7684DNA\u66f4\u590d\u6742\uff0c\u6570\u636e\u91cf\u66f4\u5927\uff0c\u56e0\u6b64\u9700\u8981Big Data Algorithm\u3002\u8fd9\u4e2a\u5e7b\u706f\u4ecb\u7ecd\u4e09\u79cd\u7b97\u6cd5\uff1aSkipList, HyperLogLog, Bloom filter\uff08CountMin Sketch\uff09\u3002 SkipList\u662f\u4e00\u79cd\u57fa\u4e8e\u94fe\u8868\u7684\u6570\u636e\u7ed3\u6784\uff0c\u76f8\u5bf9\u7fbd\u5e73\u8861\u4e8c\u53c9\u6811\uff0c\u8fd9\u4e2a\u7b97\u6cd5\u7684\u4f18\u70b9\u662f\u66f4\u597d\u7684\u652f\u6301\u5e76\u53d1\u64cd\u4f5c\u3002\u672c\u8d28\u4e0a\uff0cSkipList\u662f\u4e00\u4e2a\u5206\u5c42\u6b21\u7684\u94fe\u8868\u3002\u5728\u6700\u5e95\u5c42\uff0c\u94fe\u8868\u5143\u7d20\u6309\u987a\u5e8f\u6392\u5217\u3002\u5728\u66f4\u9ad8\u7684\u5c42\u6b21\uff0c\uff08\u6309\u7167\u6982\u7387\uff09\u7b80\u5386\u4e00\u90e8\u5206\u4f4e\u5c42\u7684\u6570\u636e\u7684\u7d22\u5f15\u3002\u8fd9\u79cd\u6570\u636e\u7ed3\u6784\u5728\u67e5\u627e\u65f6\u975e\u5e38\u6709\u6548\uff1a\u4ece\u9ad8\u5c42\u5f00\u59cb\u67e5\u627e\uff0c\u76f4\u5230\u6700\u5e95\u5c42\u987a\u5e8f\u67e5\u627e\uff0c\u6574\u4e2a\u67e5\u627e\u662flog\uff08N\uff09 HyperLogLog\u662f\u5e94\u7528\u4e8e\u5927\u6570\u636e\u7684\u7b97\u6cd5\uff0c\u7528\u6765\u8ba1\u7b97\u4e00\u4e2a\u5f88\u5927\u96c6\u5408\u7684\u57fa\u6570\uff08\u5373\u5408\u7406\u603b\u5171\u6709\u591a\u5c11\u4e0d\u76f8\u540c\u7684\u5143\u7d20\uff09\u3002\u5927\u81f4\u601d\u8def\u662f\u7528\u4e00\u7ec4\u76f8\u4e92\u72ec\u7acb\u7684\u54c8\u5e0c\u51fd\u6570\u4f9d\u6b21\u5904\u7406\u8f93\u5165\uff0c\u7136\u540e\u5bf9\u54c8\u5e0c\u503c\u5206\u5757\u8ba1\u6570\uff1a\u5bf9\u9ad8\u4f4d\u7edf\u8ba1\u6709\u591a\u5c11\u8fde\u7eed\u76840\uff1b\u7528\u4f4e\u4f4d\u7684\u503c\u5f53\u505a\u6570\u636e\u5757\u3002\u6bd4\u5982:011000|01\uff0c\u5c31\u662f\u9ad8\u4f4d\u67093\u4e2a\u8fde\u7eed\u76840\uff0c\u4f4e\u4f4d\u662f1\uff0c\u5c31\u8868\u793a\u7b2c\u4e00\u4e2a\u6570\u636e\u5757\u3002\u56e0\u4e3a\u8fde\u7eed\u89c2\u6d4b\u7684\u4e09\u4e2a0\u7684\u6982\u7387\u5927\u7ea6\u662f1\/8\uff0c\u6240\u4ee5\u5bf9\u6570\u636e\u57571\u6765\u8bb2\uff0c\u53ef\u4ee5\u628a\b\u8ba1\u6570\u4e588\uff0c\u4f5c\u4e3a\u96c6\u5408\u57fa\u6570\u7684\u4f30\u8ba1\u3002\u56e0\u4e3a\u4f4e\u4f4d\u53ef\u80fd\u67090\uff0c1\uff0c2\uff0c3\u8fd9\u56db\u79cd\u6570\u503c\uff0c\u603b\u57fa\u6570\u53ef\u4ee5\u53d6\u4e0a\u8ff04\u4e2d\u6280\u672f\u7684\u51e0\u4f55\u5e73\u5747\u6570\u3002\u5728HyperLogLog\u4e2d\uff0c\u5177\u4f53\u7684\u8fd8\u6709\u4e00\u4e9b\u7cfb\u6570\u53ef\u4ee5\u8c03\u6574\uff0c\u4f7f\u5f97\u4f30\u8ba1\u66f4\u51c6\u786e\u3002 \u8fd9\u7247Blog\u8be6\u7ec6\u4ecb\u7ecd\u4e86HyperLogLog\u7b97\u6cd5\uff0c\u56fe\u6587\u5e76\u8302\u3002 BloomFilter\u6216CountMin Sketch\u662f\u4e24\u4e2a\u4e0d\u540c\u7684\u7b97\u6cd5\uff0c\u4f46\u53c8\u6709\u7d27\u5bc6\u8054\u7cfb\u3002\u76f8\u4f3c\u4e4b\u5904\u662f\u4e24\u4e2a\u7b97\u6cd5\u90fd\u9700\u8981\u4e00\u65cf\u72ec\u7acb\u7684\u54c8\u5e0c\u51fd\u6570\u3002\u4e0d\u540c\u4e4b\u5904\u662f\u5904\u7406\u7684\u95ee\u9898\u4e0d\u540c\u3002\u5bf9BloomFilter,\u5728\u9884\u5904\u7406\u9636\u6bb5\u5bf9\u6bcf\u4e00\u4e2a\u7279\u5b9a\u7684\u8f93\u5165\u7b97\u51fa\u6240\u6709\u54c8\u5e0c\u51fd\u6570\u7684\u503c\uff0c\u5e76\u5728\u8fd9\u4e9b\u503c\u4e0a\u505a\u51fa\u6807\u8bb0\u3002\u6700\u540e\uff0c\u5f53\u67e5\u627e\u4e00\u4e2a\u7279\u5b9a\u7684\u8f93\u5165\u662f\u5426\u51fa\u73b0\u8fc7\uff0c\u53ea\u9700\u67e5\u627e\u8fd9\u4e00\u7cfb\u5217\u7684\u54c8\u5e0c\u51fd\u6570\u5bf9\u5e94\u503c\u4e0a\u6709\u6ca1\u6709\u6807\u8bb0\u3002\u5bf9\u4e8eBloomFilter\uff0c\u53ef\u80fd\u6709False Positive\uff0c\u4f46\u4e0d\u53ef\u80fd\u6709False Negative\u3002\u6b64\u5916\uff0cBloomFilter\u53ef\u770b\u505a\u67e5\u627e\u4e00\u4e2a\u6570\u636e\u6709\u6216\u8005\u6ca1\u6709\u7684\u6570\u636e\u7ed3\u6784\uff08\u6570\u636e\u7684\u9891\u7387\u662f\u5426\u5927\u4e8e1\uff09\u3002CountMin Sketch\u5728BloomFilter\u7684\u57fa\u7840\u4e0a\u66f4\u8fdb\u4e00\u6b65\uff0c\u5b83\u53ef\u7528\u6765\u4f30\u7b97\u67d0\u4e00\u4e2a\u8f93\u5165\u7684\u9891\u7387\uff08\u4e0d\u5c40\u9650\u4e8e\u5927\u4e8e1\uff09\u3002\u5177\u4f53\u601d\u8def\u662f\u5bf9\u54c8\u5e0c\u51fd\u6570\u503c\u5bf9\u5e94\u7684sketch\u4e0a\u8ba1\u6570\uff08\u5bf9BloomFilter\u5219\u53ea\u662f\u6807\u8bb0\u662f\u6216\u5426\uff09\u3002\u6700\u540e\u4f30\u8ba1\u9891\u7387\u7684\u65f6\u5019\uff0c\u5bf9\u6bcf\u4e2a\u4f30\u7b97\u51fa\u7684\u9891\u7387\u53d6\u6700\u5c0f\u503c\u3002 \u539f\u59cb\u94fe\u63a5 4. 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