{"id":2750,"date":"2025-03-14T22:34:55","date_gmt":"2025-03-14T14:34:55","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=2750"},"modified":"2025-03-14T22:34:55","modified_gmt":"2025-03-14T14:34:55","slug":"python3-%e5%be%aa%e7%8e%af%e8%af%ad%e5%8f%a5%e8%af%a6%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2025\/03\/14\/python3-%e5%be%aa%e7%8e%af%e8%af%ad%e5%8f%a5%e8%af%a6%e8%a7%a3\/","title":{"rendered":"Python3 \u5faa\u73af\u8bed\u53e5\u8be6\u89e3"},"content":{"rendered":"\n

Python \u7684\u5faa\u73af\u8bed\u53e5<\/strong>\u7528\u4e8e\u591a\u6b21\u6267\u884c\u67d0\u6bb5\u4ee3\u7801\uff0c\u76f4\u5230\u6ee1\u8db3\u7279\u5b9a\u7684\u6761\u4ef6\u3002Python \u4e3b\u8981\u63d0\u4f9b\u4e86\u4e24\u79cd\u5faa\u73af\u7ed3\u6784\uff1a<\/p>\n\n\n\n

    \n
  1. while<\/code> \u5faa\u73af<\/li>\n\n\n\n
  2. for<\/code> \u5faa\u73af<\/li>\n<\/ol>\n\n\n\n

    \u6b64\u5916\uff0cPython \u63d0\u4f9b\u4e86 break<\/code>\u3001continue<\/code> \u548c else<\/code> \u7528\u4e8e\u63a7\u5236\u5faa\u73af\u6d41\u7a0b\u3002<\/p>\n\n\n\n

    \n\n\n\n

    1. while<\/code> \u5faa\u73af<\/strong><\/h2>\n\n\n\n

    while<\/code> \u8bed\u53e5\u7528\u4e8e\u5728\u6761\u4ef6\u4e3a True<\/code> \u65f6\u91cd\u590d\u6267\u884c\u4ee3\u7801\u5757\u3002<\/strong><\/p>\n\n\n\n

    \ud83d\udccc \u8bed\u6cd5<\/strong><\/p>\n\n\n\n

    while \u6761\u4ef6:\n    \u4ee3\u7801\u5757<\/code><\/pre>\n\n\n\n
    \ud83d\udccc \u793a\u4f8b<\/strong><\/p>\n\n\n\n
    num = 1\nwhile num <= 5:  # \u5f53 num \u5c0f\u4e8e\u7b49\u4e8e 5 \u65f6\u6267\u884c\n    print(\"\u5f53\u524d\u6570\u5b57:\", num)\n    num += 1  # \u9012\u589e num<\/code><\/pre>\n\n\n\n
    \ud83d\udd39 \u8f93\u51fa<\/strong><\/p>\n\n\n\n
    \u5f53\u524d\u6570\u5b57: 1\n\u5f53\u524d\u6570\u5b57: 2\n\u5f53\u524d\u6570\u5b57: 3\n\u5f53\u524d\u6570\u5b57: 4\n\u5f53\u524d\u6570\u5b57: 5<\/code><\/pre>\n\n\n\n
    \n\n\n\n
    2. for<\/code> \u5faa\u73af<\/strong><\/h2>\n\n\n\n
    for<\/code> \u8bed\u53e5\u7528\u4e8e\u904d\u5386\u53ef\u8fed\u4ee3\u5bf9\u8c61\uff08\u5982\u5217\u8868\u3001\u5143\u7ec4\u3001\u5b57\u7b26\u4e32\u3001\u5b57\u5178\u3001\u96c6\u5408\u7b49\uff09\u3002<\/strong><\/p>\n\n\n\n
    \ud83d\udccc \u8bed\u6cd5<\/strong><\/p>\n\n\n\n
    for \u53d8\u91cf in \u53ef\u8fed\u4ee3\u5bf9\u8c61:\n    \u4ee3\u7801\u5757<\/code><\/pre>\n\n\n\n
    \ud83d\udccc \u793a\u4f8b<\/strong><\/p>\n\n\n\n
    fruits = [\"\u82f9\u679c\", \"\u9999\u8549\", \"\u6a59\u5b50\"]\nfor fruit in fruits:\n    print(\"\u6211\u559c\u6b22\u5403\", fruit)<\/code><\/pre>\n\n\n\n
    \ud83d\udd39 \u8f93\u51fa<\/strong><\/p>\n\n\n\n
    \u6211\u559c\u6b22\u5403 \u82f9\u679c\n\u6211\u559c\u6b22\u5403 \u9999\u8549\n\u6211\u559c\u6b22\u5403 \u6a59\u5b50<\/code><\/pre>\n\n\n\n
    \n\n\n\n
    3. range()<\/code> \u7ed3\u5408 for<\/code> \u5faa\u73af<\/strong><\/h2>\n\n\n\n
    range(start, stop, step)<\/code> \u751f\u6210\u4e00\u4e2a\u6574\u6570\u5e8f\u5217\uff1a<\/p>\n\n\n\n
      \n
    • start<\/code>\uff08\u8d77\u59cb\u503c\uff0c\u9ed8\u8ba4 0<\/code>\uff09<\/li>\n\n\n\n
    • stop<\/code>\uff08\u7ec8\u6b62\u503c\uff0c\u4e0d\u5305\u542b\uff09<\/li>\n\n\n\n
    • step<\/code>\uff08\u6b65\u957f\uff0c\u9ed8\u8ba4 1<\/code>\uff09<\/li>\n<\/ul>\n\n\n\n
      \ud83d\udccc \u793a\u4f8b<\/strong><\/p>\n\n\n\n
      for i in range(1, 6):  # \u904d\u5386 1 \u5230 5\n    print(\"\u5f53\u524d\u6570\u5b57:\", i)<\/code><\/pre>\n\n\n\n
      \ud83d\udd39 \u8f93\u51fa<\/strong><\/p>\n\n\n\n
      \u5f53\u524d\u6570\u5b57: 1\n\u5f53\u524d\u6570\u5b57: 2\n\u5f53\u524d\u6570\u5b57: 3\n\u5f53\u524d\u6570\u5b57: 4\n\u5f53\u524d\u6570\u5b57: 5<\/code><\/pre>\n\n\n\n
      \ud83d\udccc \u6307\u5b9a\u6b65\u957f<\/strong><\/p>\n\n\n\n
      for i in range(0, 10, 2):  # \u751f\u6210 0, 2, 4, 6, 8\n    print(i)<\/code><\/pre>\n\n\n\n
      \ud83d\udd39 \u8f93\u51fa<\/strong><\/p>\n\n\n\n
      0\n2\n4\n6\n8<\/code><\/pre>\n\n\n\n
      \ud83d\udccc \u9006\u5e8f\u904d\u5386<\/strong><\/p>\n\n\n\n
      for i in range(10, 0, -2):  # \u751f\u6210 10, 8, 6, 4, 2\n    print(i)<\/code><\/pre>\n\n\n\n
      \ud83d\udd39 \u8f93\u51fa<\/strong><\/p>\n\n\n\n
      10\n8\n6\n4\n2<\/code><\/pre>\n\n\n\n
      \n\n\n\n
      4. \u904d\u5386\u5b57\u7b26\u4e32<\/strong><\/h2>\n\n\n\n
      for<\/code> \u5faa\u73af\u53ef\u4ee5\u9010\u4e2a\u8bbf\u95ee\u5b57\u7b26\u4e32\u4e2d\u7684\u5b57\u7b26\u3002<\/p>\n\n\n\n
      \ud83d\udccc \u793a\u4f8b<\/strong><\/p>\n\n\n\n
      word = \"Python\"\nfor char in word:\n    print(char)<\/code><\/pre>\n\n\n\n
      \ud83d\udd39 \u8f93\u51fa<\/strong><\/p>\n\n\n\n
      P\ny\nt\nh\no\nn<\/code><\/pre>\n\n\n\n
      \n\n\n\n
      5. \u904d\u5386\u5b57\u5178<\/strong><\/h2>\n\n\n\n
      \u904d\u5386\u5b57\u5178\u7684 keys()<\/code>\u3001values()<\/code> \u6216 items()<\/code>\u3002<\/p>\n\n\n\n
      \ud83d\udccc \u793a\u4f8b<\/strong><\/p>\n\n\n\n
      person = {\"name\": \"\u5f20\u4e09\", \"age\": 25, \"city\": \"\u5317\u4eac\"}\n\nfor key, value in person.items():\n    print(f\"{key}: {value}\")<\/code><\/pre>\n\n\n\n
      \ud83d\udd39 \u8f93\u51fa<\/strong><\/p>\n\n\n\n
      name: \u5f20\u4e09\nage: 25\ncity: \u5317\u4eac<\/code><\/pre>\n\n\n\n
      \n\n\n\n
      6. break<\/code> \u8bed\u53e5<\/strong><\/h2>\n\n\n\n
      break<\/code> \u8bed\u53e5\u7528\u4e8e\u63d0\u524d\u7ec8\u6b62\u5faa\u73af\u3002<\/strong><\/p>\n\n\n\n
      \ud83d\udccc \u793a\u4f8b<\/strong><\/p>\n\n\n\n
      for i in range(1, 10):\n    if i == 5:\n        print(\"\u9047\u5230 5\uff0c\u505c\u6b62\u5faa\u73af\")\n        break\n    print(i)<\/code><\/pre>\n\n\n\n
      \ud83d\udd39 \u8f93\u51fa<\/strong><\/p>\n\n\n\n
      1\n2\n3\n4\n\u9047\u5230 5\uff0c\u505c\u6b62\u5faa\u73af<\/code><\/pre>\n\n\n\n
      \ud83d\udccc while<\/code> \u5faa\u73af\u4e2d\u7684 break<\/code><\/strong><\/p>\n\n\n\n
      num = 1\nwhile num <= 10:\n    if num == 5:\n        print(\"\u9047\u5230 5\uff0c\u505c\u6b62\u5faa\u73af\")\n        break\n    print(num)\n    num += 1<\/code><\/pre>\n\n\n\n
      \ud83d\udd39 \u8f93\u51fa<\/strong><\/p>\n\n\n\n
      1\n2\n3\n4\n\u9047\u5230 5\uff0c\u505c\u6b62\u5faa\u73af<\/code><\/pre>\n\n\n\n
      \n\n\n\n
      7. continue<\/code> \u8bed\u53e5<\/strong><\/h2>\n\n\n\n
      continue<\/code> \u8bed\u53e5\u7528\u4e8e\u8df3\u8fc7\u5f53\u524d\u5faa\u73af\u7684\u5269\u4f59\u4ee3\u7801\uff0c\u76f4\u63a5\u8fdb\u5165\u4e0b\u4e00\u6b21\u5faa\u73af\u3002<\/strong><\/p>\n\n\n\n
      \ud83d\udccc \u793a\u4f8b<\/strong><\/p>\n\n\n\n
      for i in range(1, 6):\n    if i == 3:\n        print(\"\u8df3\u8fc7 3\")\n        continue\n    print(i)<\/code><\/pre>\n\n\n\n
      \ud83d\udd39 \u8f93\u51fa<\/strong><\/p>\n\n\n\n
      1\n2\n\u8df3\u8fc7 3\n4\n5<\/code><\/pre>\n\n\n\n
      \n\n\n\n
      8. else<\/code> \u4e0e\u5faa\u73af<\/strong><\/h2>\n\n\n\n
      else<\/code> \u53ef\u4ee5\u4e0e while<\/code> \u548c for<\/code> \u8bed\u53e5\u4e00\u8d77\u4f7f\u7528\uff1a<\/p>\n\n\n\n
        \n
      • \u5f53\u5faa\u73af\u6b63\u5e38\u7ed3\u675f<\/strong>\uff08\u5373\u6ca1\u6709 break<\/code> \u7ec8\u6b62\uff09\u65f6\uff0c\u6267\u884c else<\/code> \u4ee3\u7801\u5757\u3002<\/li>\n\n\n\n
      • \u5982\u679c\u5faa\u73af\u88ab break<\/code> \u7ec8\u6b62\uff0c\u5219 else<\/code> \u4e0d\u4f1a\u6267\u884c\u3002<\/li>\n<\/ul>\n\n\n\n
        \ud83d\udccc \u793a\u4f8b<\/strong><\/p>\n\n\n\n
        for i in range(1, 6):\n    print(i)\nelse:\n    print(\"\u5faa\u73af\u6b63\u5e38\u7ed3\u675f\")<\/code><\/pre>\n\n\n\n
        \ud83d\udd39 \u8f93\u51fa<\/strong><\/p>\n\n\n\n
        1\n2\n3\n4\n5\n\u5faa\u73af\u6b63\u5e38\u7ed3\u675f<\/code><\/pre>\n\n\n\n
        \ud83d\udccc \u5982\u679c break<\/code> \u7ec8\u6b62\u5faa\u73af<\/strong><\/p>\n\n\n\n
        for i in range(1, 6):\n    if i == 3:\n        print(\"\u9047\u5230 3\uff0c\u505c\u6b62\u5faa\u73af\")\n        break\n    print(i)\nelse:\n    print(\"\u5faa\u73af\u6b63\u5e38\u7ed3\u675f\")<\/code><\/pre>\n\n\n\n
        \ud83d\udd39 \u8f93\u51fa<\/strong><\/p>\n\n\n\n
        1\n2\n\u9047\u5230 3\uff0c\u505c\u6b62\u5faa\u73af<\/code><\/pre>\n\n\n\n
        \ud83d\udd39 \u6ce8\u610f<\/strong>\uff1aelse<\/code> \u6ca1\u6709\u6267\u884c\uff0c\u56e0\u4e3a break<\/code> \u7ec8\u6b62\u4e86\u5faa\u73af\u3002<\/p>\n\n\n\n
        \n\n\n\n
        9. pass<\/code> \u8bed\u53e5<\/strong><\/h2>\n\n\n\n
        pass<\/code> \u8bed\u53e5\u7528\u4e8e\u5360\u4f4d<\/strong>\uff0c\u9632\u6b62\u8bed\u6cd5\u9519\u8bef\u3002<\/p>\n\n\n\n
        \ud83d\udccc \u793a\u4f8b<\/strong><\/p>\n\n\n\n
        for i in range(5):\n    pass  # \u672a\u6765\u53ef\u80fd\u586b\u5145\u4ee3\u7801<\/code><\/pre>\n\n\n\n
        \n\n\n\n
        10. enumerate()<\/code> \u51fd\u6570<\/strong><\/h2>\n\n\n\n
        enumerate()<\/code> \u7528\u4e8e\u5728 for<\/code> \u5faa\u73af\u4e2d\u540c\u65f6\u83b7\u53d6\u7d22\u5f15\u548c\u503c\u3002<\/p>\n\n\n\n
        \ud83d\udccc \u793a\u4f8b<\/strong><\/p>\n\n\n\n
        fruits = [\"\u82f9\u679c\", \"\u9999\u8549\", \"\u6a59\u5b50\"]\n\nfor index, fruit in enumerate(fruits):\n    print(f\"\u7d22\u5f15 {index}: {fruit}\")<\/code><\/pre>\n\n\n\n
        \ud83d\udd39 \u8f93\u51fa<\/strong><\/p>\n\n\n\n
        \u7d22\u5f15 0: \u82f9\u679c\n\u7d22\u5f15 1: \u9999\u8549\n\u7d22\u5f15 2: \u6a59\u5b50<\/code><\/pre>\n\n\n\n
        \n\n\n\n
        11. zip()<\/code> \u7ec4\u5408\u591a\u4e2a\u53ef\u8fed\u4ee3\u5bf9\u8c61<\/strong><\/h2>\n\n\n\n
        \ud83d\udccc \u793a\u4f8b<\/strong><\/p>\n\n\n\n
        names = [\"\u5f20\u4e09\", \"\u674e\u56db\", \"\u738b\u4e94\"]\nscores = [85, 90, 78]\n\nfor name, score in zip(names, scores):\n    print(f\"{name}: {score}\")<\/code><\/pre>\n\n\n\n
        \ud83d\udd39 \u8f93\u51fa<\/strong><\/p>\n\n\n\n
        \u5f20\u4e09: 85\n\u674e\u56db: 90\n\u738b\u4e94: 78<\/code><\/pre>\n\n\n\n
        \n\n\n\n
        12. \u5217\u8868\u63a8\u5bfc\u5f0f<\/strong><\/h2>\n\n\n\n
        \u5217\u8868\u63a8\u5bfc\u5f0f\uff08List Comprehension\uff09\u53ef\u7b80\u5316 for<\/code> \u5faa\u73af\u3002<\/p>\n\n\n\n
        \ud83d\udccc \u793a\u4f8b<\/strong><\/p>\n\n\n\n
        squares = [x**2 for x in range(1, 6)]\nprint(squares)<\/code><\/pre>\n\n\n\n
        \ud83d\udd39 \u8f93\u51fa<\/strong><\/p>\n\n\n\n
        [1, 4, 9, 16, 25]<\/code><\/pre>\n\n\n\n
        \n\n\n\n
        13. \u603b\u7ed3<\/strong><\/h2>\n\n\n\n
        \u2705 while<\/code> \u9002\u7528\u4e8e\u672a\u77e5\u5faa\u73af\u6b21\u6570\u7684\u60c5\u51b5\u3002
        \u2705 for<\/code> \u9002\u7528\u4e8e\u904d\u5386\u53ef\u8fed\u4ee3\u5bf9\u8c61\u3002
        \u2705 break<\/code> \u7ec8\u6b62\u5faa\u73af\u3002
        \u2705 continue<\/code> \u8df3\u8fc7\u672c\u6b21\u5faa\u73af\u3002
        \u2705 else<\/code> \u5728\u5faa\u73af\u672a\u88ab break<\/code> \u7ec8\u6b62\u65f6\u6267\u884c\u3002
        \u2705 enumerate()<\/code> \u83b7\u53d6\u7d22\u5f15\u548c\u503c\u3002
        \u2705 zip()<\/code> \u7ec4\u5408\u591a\u4e2a\u53ef\u8fed\u4ee3\u5bf9\u8c61\u3002
        \u2705 \u5217\u8868\u63a8\u5bfc\u5f0f<\/strong> \u63d0\u9ad8\u4ee3\u7801\u7b80\u6d01\u6027\u3002<\/p>\n\n\n\n
        \u66f4\u591a\u8be6\u7ec6\u5185\u5bb9\u8bf7\u5173\u6ce8\u5176\u4ed6\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
        Python \u7684\u5faa\u73af\u8bed\u53e5\u7528\u4e8e\u591a\u6b21\u6267\u884c\u67d0\u6bb5\u4ee3\u7801\uff0c\u76f4\u5230\u6ee1\u8db3\u7279\u5b9a\u7684\u6761\u4ef6\u3002Python \u4e3b\u8981\u63d0\u4f9b\u4e86\u4e24\u79cd\u5faa\u73af\u7ed3\u6784\uff1a \u6b64\u5916 […]<\/p>\n","protected":false},"author":1,"featured_media":2751,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[79],"tags":[],"class_list":["post-2750","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-python-3-"],"_links":{"self":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2750","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/comments?post=2750"}],"version-history":[{"count":1,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2750\/revisions"}],"predecessor-version":[{"id":2752,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2750\/revisions\/2752"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media\/2751"}],"wp:attachment":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media?parent=2750"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/categories?post=2750"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/tags?post=2750"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}