{"id":321,"date":"2023-02-01T18:25:55","date_gmt":"2023-11-18T21:33:02","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/index.php\/2023\/11\/30\/python-%e5%ad%97%e7%ac%a6%e4%b8%b2%e8%bf%bd%e5%8a%a0\/"},"modified":"2025-08-01T22:02:02","modified_gmt":"2025-08-01T14:02:02","slug":"python-%e5%ad%97%e7%ac%a6%e4%b8%b2%e8%bf%bd%e5%8a%a0","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/python-%e5%ad%97%e7%ac%a6%e4%b8%b2%e8%bf%bd%e5%8a%a0\/","title":{"rendered":"Python\u5b57\u7b26\u4e32\u8ffd\u52a0\u76845\u79cd\u9ad8\u6548\u65b9\u6cd5\uff1a\u5168\u9762\u6559\u7a0b\u4e0e\u5b9e\u4f8b"},"content":{"rendered":"<p>\u8fd9\u662f\u6587\u7ae0\u300aPython \u5b57\u7b26\u4e32\u8ffd\u52a0\u300b\u7684\u7b2c1\u90e8\u5206\uff08\u51711\u90e8\u5206\uff09\u3002<\/p>\n<p>Python\u7684\u5b57\u7b26\u4e32\u5bf9\u8c61\u662f\u4e0d\u53ef\u53d8\u7684\u3002\u56e0\u6b64\uff0c\u6bcf\u6b21\u6211\u4eec\u4f7f\u7528\u52a0\u53f7\u8fd0\u7b97\u7b26\u6765\u8fde\u63a5\u4e24\u4e2a\u5b57\u7b26\u4e32\u65f6\uff0c\u90fd\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u5b57\u7b26\u4e32\u3002\u5982\u679c\u6211\u4eec\u9700\u8981\u8ffd\u52a0\u8bb8\u591a\u5b57\u7b26\u4e32\uff0c\u4f7f\u7528\u52a0\u53f7\u8fd0\u7b97\u7b26\u4f1a\u5728\u6211\u4eec\u5f97\u5230\u6700\u7ec8\u7ed3\u679c\u4e4b\u524d\u4e0d\u5fc5\u8981\u5730\u521b\u5efa\u8bb8\u591a\u4e34\u65f6\u5b57\u7b26\u4e32\u3002<\/p>\n<h2>\u5728Python\u4e2d\uff0c\u5b57\u7b26\u4e32\u7684\u8ffd\u52a0<\/h2>\n<p>\u6211\u4eec\u6765\u770b\u4e00\u4e2a\u5c06\u5b57\u7b26\u4e32\u8fde\u7eed\u91cd\u590dn\u6b21\u7684\u51fd\u6570\u3002<\/p>\n<pre class=\"post-pre\"><code>def str_append(s, n):\r\n    output = ''\r\n    i = 0\r\n    while i &lt; n:\r\n        output += s\r\n        i = i + 1\r\n    return output\r\n<\/code><\/pre>\n<p>\u8bf7\u6ce8\u610f\uff0c\u6211\u6b63\u5728\u5b9a\u4e49\u8fd9\u4e2a\u51fd\u6570\u6765\u5c55\u793a+\u8fd0\u7b97\u7b26\u7684\u7528\u6cd5\u3002\u6211\u4e4b\u540e\u5c06\u4f7f\u7528timeit\u6a21\u5757\u6d4b\u8bd5\u6027\u80fd\u3002\u5982\u679c\u60a8\u53ea\u662f\u60f3\u5c06\u4e00\u4e2a\u5b57\u7b26\u4e32\u8fde\u63a5\u548c\u91cd\u590d&#8217;n&#8217;\u6b21\uff0c\u60a8\u53ef\u4ee5\u8f7b\u677e\u5730\u4f7f\u7528s = &#8216;Hi&#8217; * 10\u3002<\/p>\n<p>\u53e6\u4e00\u79cd\u6267\u884c\u5b57\u7b26\u4e32\u9644\u52a0\u64cd\u4f5c\u7684\u65b9\u6cd5\u662f\u521b\u5efa\u4e00\u4e2a\u5217\u8868\u5e76\u5c06\u5b57\u7b26\u4e32\u8ffd\u52a0\u5230\u5217\u8868\u4e2d\u3002\u7136\u540e\u4f7f\u7528\u5b57\u7b26\u4e32\u7684join()\u51fd\u6570\u5c06\u5b83\u4eec\u5408\u5e76\u5728\u4e00\u8d77\uff0c\u5f97\u5230\u7ed3\u679c\u5b57\u7b26\u4e32\u3002<\/p>\n<pre class=\"post-pre\"><code>def str_append_list_join(s, n):\r\n    l1 = []\r\n    i = 0\r\n    while i &lt; n:\r\n        l1.append(s)\r\n        i += 1\r\n    return ''.join(l1)\r\n<\/code><\/pre>\n<p>\u8ba9\u6211\u4eec\u6d4b\u8bd5\u8fd9\u4e9b\u65b9\u6cd5\uff0c\u786e\u4fdd\u5b83\u4eec\u6309\u9884\u671f\u5de5\u4f5c\u3002<\/p>\n<pre class=\"post-pre\"><code>if __name__ == \"__main__\":\r\n    print('\u4f7f\u7528+\u8fd0\u7b97\u7b26\u8ffd\u52a0:', str_append('Hi', 10))\r\n    print('\u4f7f\u7528\u5217\u8868\u548cjoin()\u65b9\u6cd5\u8ffd\u52a0:', str_append_list_join('Hi', 10))\r\n    # \u8fd9\u79cd\u60c5\u51b5\u4e0b\u53ef\u4ee5\u4f7f\u7528\u4e0b\u9762\u7684\u65b9\u6cd5\uff0c\u4e0a\u9762\u7684\u65b9\u6cd5\u662f\u4e3a\u4e86\u8ba9\u6211\u4eec\u80fd\u591f\r\n    # \u4f7f\u7528timeit\u6a21\u5757\u68c0\u67e5\u6027\u80fd\u800c\u521b\u5efa\u7684\r\n    print('\u4f7f\u7528*\u8fd0\u7b97\u7b26\u8ffd\u52a0:', 'Hi' * 10)\r\n<\/code><\/pre>\n<p>\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n<pre class=\"post-pre\"><code>\u4f7f\u7528+\u8fd0\u7b97\u7b26\u8ffd\u52a0: HiHiHiHiHiHiHiHiHiHi\r\n\u4f7f\u7528\u5217\u8868\u548cjoin()\u65b9\u6cd5\u8ffd\u52a0: HiHiHiHiHiHiHiHiHiHi\r\n\u4f7f\u7528*\u8fd0\u7b97\u7b26\u8ffd\u52a0: HiHiHiHiHiHiHiHiHiHi\r\n<\/code><\/pre>\n<h2>\u5728Python\u4e2d\u8fde\u63a5\u5b57\u7b26\u4e32\u7684\u6700\u4f73\u65b9\u6cd5\u662f\u4ec0\u4e48\uff1f<\/h2>\n<p>\u6211\u5728string_append.py\u6587\u4ef6\u4e2d\u5b9a\u4e49\u4e86\u4e24\u79cd\u65b9\u6cd5\u3002\u8ba9\u6211\u4eec\u4f7f\u7528timeit\u6a21\u5757\u6765\u68c0\u67e5\u5b83\u4eec\u7684\u6027\u80fd\u3002<\/p>\n<pre class=\"post-pre\"><code>$ python3.7 -m timeit --number 1000 --unit usec 'import string_append' 'string_append.str_append(\"Hello\", 1000)' \r\n1000 loops, best of 5: 174 usec per loop\r\n$ python3.7 -m timeit --number 1000 --unit usec 'import string_append' 'string_append.str_append_list_join(\"Hello\", 1000)'\r\n1000 loops, best of 5: 140 usec per loop\r\n\r\n$ python3.7 -m timeit --number 1000 --unit usec 'import string_append' 'string_append.str_append(\"Hi\", 1000)' \r\n1000 loops, best of 5: 165 usec per loop\r\n$ python3.7 -m timeit --number 1000 --unit usec 'import string_append' 'string_append.str_append_list_join(\"Hi\", 1000)'\r\n1000 loops, best of 5: 139 usec per loop\r\n<\/code><\/pre>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/656481b3a4b2f92e6c72ec89\/14-0.png\" alt=\"Python\u5b57\u7b26\u4e32\u8ffd\u52a0\uff0cPython\u6dfb\u52a0\u5b57\u7b26\u4e32\" \/><\/div>\n<h2>\u603b\u7ed3<\/h2>\n<p>\u5982\u679c\u5b57\u7b26\u4e32\u5f88\u5c11\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528\u4efb\u4f55\u65b9\u6cd5\u6765\u62fc\u63a5\u5b83\u4eec\u3002\u4ece\u53ef\u8bfb\u6027\u7684\u89d2\u5ea6\u6765\u770b\uff0c\u5bf9\u4e8e\u5c11\u91cf\u7684\u5b57\u7b26\u4e32\uff0c\u4f7f\u7528 + \u8fd0\u7b97\u7b26\u4f3c\u4e4e\u66f4\u597d\u3002\u7136\u800c\uff0c\u5982\u679c\u4f60\u9700\u8981\u62fc\u63a5\u5927\u91cf\u7684\u5b57\u7b26\u4e32\uff0c\u90a3\u4e48\u4f60\u5e94\u8be5\u4f7f\u7528\u5217\u8868\u548c join() \u51fd\u6570\u3002<\/p>\n<p>\u60a8\u53ef\u4ee5\u4ece\u6211\u4eec\u7684GitHub\u5b58\u50a8\u5e93\u4e2d\u67e5\u770b\u5b8c\u6574\u7684Python\u811a\u672c\u548c\u66f4\u591aPython\u793a\u4f8b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8fd9\u662f\u6587\u7ae0\u300aPython \u5b57\u7b26\u4e32\u8ffd\u52a0\u300b\u7684\u7b2c1\u90e8\u5206\uff08\u51711\u90e8\u5206\uff09\u3002 Python\u7684\u5b57\u7b26\u4e32\u5bf9\u8c61\u662f\u4e0d\u53ef\u53d8\u7684\u3002\u56e0\u6b64\uff0c\u6bcf\u6b21\u6211 [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[32,1102,190,1101,307],"class_list":{"0":"post-321","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"hentry","6":"category-uncategorized","7":"tag-python","9":"tag-190","10":"tag-1101","11":"tag-307"},"yoast_head":"<!-- This site is optimized with the Yoast SEO 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