{"id":593,"date":"2025-10-23T15:39:49","date_gmt":"2025-10-23T07:39:49","guid":{"rendered":"http:\/\/www.pyteam.cn\/?p=593"},"modified":"2025-10-23T15:39:49","modified_gmt":"2025-10-23T07:39:49","slug":"python3-%e5%9f%ba%e7%a1%80%e8%af%ad%e6%b3%95-2","status":"publish","type":"post","link":"http:\/\/www.pyteam.cn\/index.php\/2025\/10\/23\/python3-%e5%9f%ba%e7%a1%80%e8%af%ad%e6%b3%95-2\/","title":{"rendered":"Python3 \u57fa\u7840\u8bed\u6cd5"},"content":{"rendered":"\n

\u7f16\u7801<\/h2>\n\n\n\n

\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0cPython3 \u6e90\u7801\u6587\u4ef6\u4ee5 UTF-8<\/strong> \u7f16\u7801\uff0c\u6240\u6709\u5b57\u7b26\u4e32\u90fd\u662f unicode \u5b57\u7b26\u4e32\u3002<\/p>\n\n\n\n

\u5f53\u7136\u4f60\u4e5f\u53ef\u4ee5\u4e3a\u6e90\u7801\u6587\u4ef6\u6307\u5b9a\u4e0d\u540c\u7684\u7f16\u7801\uff1a<\/p>\n\n\n\n

# -*- coding: cp-1252 -*-<\/pre>\n\n\n\n
\u4e0a\u8ff0\u5b9a\u4e49\u5141\u8bb8\u5728\u6e90\u6587\u4ef6\u4e2d\u4f7f\u7528 Windows-1252 \u5b57\u7b26\u96c6\u4e2d\u7684\u5b57\u7b26\u7f16\u7801\uff0c\u5bf9\u5e94\u9002\u5408\u8bed\u8a00\u4e3a\u4fdd\u52a0\u5229\u4e9a\u8bed\u3001\u767d\u4fc4\u7f57\u65af\u8bed\u3001\u9a6c\u5176\u987f\u8bed\u3001\u4fc4\u8bed\u3001\u585e\u5c14\u7ef4\u4e9a\u8bed\u3002<\/p>\n\n\n\n
\n\n\n\n
\u6807\u8bc6\u7b26<\/h2>\n\n\n\n
    \n
  • \u7b2c\u4e00\u4e2a\u5b57\u7b26\u5fc5\u987b\u4ee5\u5b57\u6bcd\uff08a-z, A-Z\uff09\u6216\u4e0b\u5212\u7ebf\u00a0_<\/strong>\u00a0\u3002<\/li>\n\n\n\n
  • \u6807\u8bc6\u7b26\u7684\u5176\u4ed6\u7684\u90e8\u5206\u7531\u5b57\u6bcd\u3001\u6570\u5b57\u548c\u4e0b\u5212\u7ebf\u7ec4\u6210\u3002<\/li>\n\n\n\n
  • \u6807\u8bc6\u7b26\u5bf9\u5927\u5c0f\u5199\u654f\u611f\uff0ccount \u548c Count \u662f\u4e0d\u540c\u7684\u6807\u8bc6\u7b26\u3002<\/li>\n\n\n\n
  • \u6807\u8bc6\u7b26\u5bf9\u957f\u5ea6\u65e0\u786c\u6027\u9650\u5236\uff0c\u4f46\u5efa\u8bae\u4fdd\u6301\u7b80\u6d01\uff08\u4e00\u822c\u4e0d\u8d85\u8fc7 20 \u4e2a\u5b57\u7b26\uff09\u3002<\/li>\n\n\n\n
  • \u7981\u6b62\u4f7f\u7528\u4fdd\u7559\u5173\u952e\u5b57\uff0c\u5982 if\u3001for\u3001class \u7b49\u4e0d\u80fd\u4f5c\u4e3a\u6807\u8bc6\u7b26\u3002<\/li>\n<\/ul>\n\n\n\n
    \u5408\u6cd5\u6807\u8bc6\u7b26\uff1a<\/p>\n\n\n\n
    age = 25\nuser_name = \"Alice\"\n_total = 100\nMAX_SIZE = 1024\ncalculate_area()\nStudentInfo\n__private_var<\/pre>\n\n\n\n
    \u975e\u6cd5\u6807\u8bc6\u7b26\uff1a<\/strong><\/p>\n\n\n\n
    2nd_place = \"silver\"    # \u9519\u8bef\uff1a\u4ee5\u6570\u5b57\u5f00\u5934\nuser-name = \"Bob\"       # \u9519\u8bef\uff1a\u5305\u542b\u8fde\u5b57\u7b26\nclass = \"Math\"          # \u9519\u8bef\uff1a\u4f7f\u7528\u5173\u952e\u5b57\n$price = 9.99          # \u9519\u8bef\uff1a\u5305\u542b\u7279\u6b8a\u5b57\u7b26\nfor = \"loop\"           # \u9519\u8bef\uff1a\u4f7f\u7528\u5173\u952e\u5b57<\/pre>\n\n\n\n
    Python 3 \u5141\u8bb8\u4f7f\u7528 Unicode \u5b57\u7b26\u4f5c\u4e3a\u6807\u8bc6\u7b26\uff0c\u53ef\u4ee5\u7528\u4e2d\u6587\u4f5c\u4e3a\u53d8\u91cf\u540d\uff0c\u975e ASCII \u6807\u8bc6\u7b26\u4e5f\u662f\u5141\u8bb8\u7684\u4e86\u3002<\/p>\n\n\n\n
    \u59d3\u540d = \"\u5f20\u4e09\"  # \u5408\u6cd5\n\u03c0 = 3.14159   # \u5408\u6cd5<\/pre>\n\n\n\n
    \u6d4b\u8bd5\u6807\u8bc6\u7b26\u662f\u5426\u5408\u6cd5\uff1a<\/p>\n\n\n\n
    \u5b9e\u4f8b<\/h2>\n\n\n\n
    def<\/strong> is_valid_identifier(name):
     try<\/strong>:
     exec<\/strong>(f”{name} = None”)
     return<\/strong> True
     except<\/strong>:
     return<\/strong> False<\/p>\n\n\n\n
    print<\/strong>(is_valid_identifier(“2var”)) # False
    print<\/strong>(is_valid_identifier(“var2”)) # True<\/p>\n\n\n\n
    \n\n\n\n
    Python \u4fdd\u7559\u5173\u952e\u5b57<\/h2>\n\n\n\n
    \u4fdd\u7559\u5b57\u5373\u5173\u952e\u5b57\uff0c\u6211\u4eec\u4e0d\u80fd\u628a\u5b83\u4eec\u7528\u4f5c\u4efb\u4f55\u6807\u8bc6\u7b26\u540d\u79f0\u3002Python \u7684\u6807\u51c6\u5e93\u63d0\u4f9b\u4e86\u4e00\u4e2a keyword \u6a21\u5757\uff0c\u53ef\u4ee5\u8f93\u51fa\u5f53\u524d\u7248\u672c\u7684\u6240\u6709\u5173\u952e\u5b57\uff1a<\/p>\n\n\n\n
    >>> import keyword\n>>> keyword.kwlist\n['False', 'None', 'True', 'and', 'as', 'assert', 'async', 'await', 'break', 'class', 'continue', 'def', 'del', 'elif', 'else', 'except', 'finally', 'for', 'from', 'global', 'if', 'import', 'in', 'is', 'lambda', 'nonlocal', 'not', 'or', 'pass', 'raise', 'return', 'try', 'while', 'with', 'yield']\n>>> <\/pre>\n\n\n\n
    \u903b\u8f91\u503c<\/strong><\/td>True<\/code><\/td>\u5e03\u5c14\u771f\u503c<\/td><\/tr>
    <\/td>False<\/code><\/td>\u5e03\u5c14\u5047\u503c<\/td><\/tr>
    <\/td>None<\/code><\/td>\u8868\u793a\u7a7a\u503c\u6216\u65e0\u503c<\/td><\/tr>
    \u903b\u8f91\u8fd0\u7b97<\/strong><\/td>and<\/code><\/td>\u903b\u8f91\u4e0e\u8fd0\u7b97<\/td><\/tr>
    <\/td>or<\/code><\/td>\u903b\u8f91\u6216\u8fd0\u7b97<\/td><\/tr>
    <\/td>not<\/code><\/td>\u903b\u8f91\u975e\u8fd0\u7b97<\/td><\/tr>
    \u6761\u4ef6\u63a7\u5236<\/strong><\/td>if<\/code><\/td>\u6761\u4ef6\u5224\u65ad\u8bed\u53e5<\/td><\/tr>
    <\/td>elif<\/code><\/td>\u5426\u5219\u5982\u679c\uff08else if \u7684\u7f29\u5199\uff09<\/td><\/tr>
    <\/td>else<\/code><\/td>\u5426\u5219\u5206\u652f<\/td><\/tr>
    \u5faa\u73af\u63a7\u5236<\/strong><\/td>for<\/code><\/td>\u8fed\u4ee3\u5faa\u73af<\/td><\/tr>
    <\/td>while<\/code><\/td>\u6761\u4ef6\u5faa\u73af<\/td><\/tr>
    <\/td>break<\/code><\/td>\u8df3\u51fa\u5faa\u73af<\/td><\/tr>
    <\/td>continue<\/code><\/td>\u8df3\u8fc7\u5f53\u524d\u5faa\u73af\u7684\u5269\u4f59\u90e8\u5206\uff0c\u8fdb\u5165\u4e0b\u4e00\u6b21\u8fed\u4ee3<\/td><\/tr>
    \u5f02\u5e38\u5904\u7406<\/strong><\/td>try<\/code><\/td>\u5c1d\u8bd5\u6267\u884c\u4ee3\u7801\u5757<\/td><\/tr>
    <\/td>except<\/code><\/td>\u6355\u83b7\u5f02\u5e38<\/td><\/tr>
    <\/td>finally<\/code><\/td>\u65e0\u8bba\u662f\u5426\u53d1\u751f\u5f02\u5e38\u90fd\u4f1a\u6267\u884c\u7684\u4ee3\u7801\u5757<\/td><\/tr>
    <\/td>raise<\/code><\/td>\u629b\u51fa\u5f02\u5e38<\/td><\/tr>
    \u51fd\u6570\u5b9a\u4e49<\/strong><\/td>def<\/code><\/td>\u5b9a\u4e49\u51fd\u6570<\/td><\/tr>
    <\/td>return<\/code><\/td>\u4ece\u51fd\u6570\u8fd4\u56de\u503c<\/td><\/tr>
    <\/td>lambda<\/code><\/td>\u521b\u5efa\u533f\u540d\u51fd\u6570<\/td><\/tr>
    \u7c7b\u4e0e\u5bf9\u8c61<\/strong><\/td>class<\/code><\/td>\u5b9a\u4e49\u7c7b<\/td><\/tr>
    <\/td>del<\/code><\/td>\u5220\u9664\u5bf9\u8c61\u5f15\u7528<\/td><\/tr>
    \u6a21\u5757\u5bfc\u5165<\/strong><\/td>import<\/code><\/td>\u5bfc\u5165\u6a21\u5757<\/td><\/tr>
    <\/td>from<\/code><\/td>\u4ece\u6a21\u5757\u5bfc\u5165\u7279\u5b9a\u90e8\u5206<\/td><\/tr>
    <\/td>as<\/code><\/td>\u4e3a\u5bfc\u5165\u7684\u6a21\u5757\u6216\u5bf9\u8c61\u521b\u5efa\u522b\u540d<\/td><\/tr>
    \u4f5c\u7528\u57df<\/strong><\/td>global<\/code><\/td>\u58f0\u660e\u5168\u5c40\u53d8\u91cf<\/td><\/tr>
    <\/td>nonlocal<\/code><\/td>\u58f0\u660e\u975e\u5c40\u90e8\u53d8\u91cf\uff08\u7528\u4e8e\u5d4c\u5957\u51fd\u6570\uff09<\/td><\/tr>
    \u5f02\u6b65\u7f16\u7a0b<\/strong><\/td>async<\/code><\/td>\u58f0\u660e\u5f02\u6b65\u51fd\u6570<\/td><\/tr>
    <\/td>await<\/code><\/td>\u7b49\u5f85\u5f02\u6b65\u64cd\u4f5c\u5b8c\u6210<\/td><\/tr>
    \u5176\u4ed6<\/strong><\/td>assert<\/code><\/td>\u65ad\u8a00\uff0c\u7528\u4e8e\u6d4b\u8bd5\u6761\u4ef6\u662f\u5426\u4e3a\u771f<\/td><\/tr>
    <\/td>in<\/code><\/td>\u68c0\u67e5\u6210\u5458\u5173\u7cfb<\/td><\/tr>
    <\/td>is<\/code><\/td>\u68c0\u67e5\u5bf9\u8c61\u8eab\u4efd\uff08\u662f\u5426\u662f\u540c\u4e00\u4e2a\u5bf9\u8c61\uff09<\/td><\/tr>
    <\/td>pass<\/code><\/td>\u7a7a\u8bed\u53e5\uff0c\u7528\u4e8e\u5360\u4f4d<\/td><\/tr>
    <\/td>with<\/code><\/td>\u4e0a\u4e0b\u6587\u7ba1\u7406\u5668\uff0c\u7528\u4e8e\u8d44\u6e90\u7ba1\u7406<\/td><\/tr>
    <\/td>yield<\/code><\/td>\u4ece\u751f\u6210\u5668\u51fd\u6570\u8fd4\u56de\u503c<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
    \u6ce8\u91ca<\/h2>\n\n\n\n
    Python\u4e2d\u5355\u884c\u6ce8\u91ca\u4ee5 #<\/strong> \u5f00\u5934\uff0c\u5b9e\u4f8b\u5982\u4e0b\uff1a<\/p>\n\n\n\n
    \u5b9e\u4f8b(Python 3.0+)<\/h2>\n\n\n\n
    #!\/usr\/bin\/python3 # \u7b2c\u4e00\u4e2a\u6ce8\u91ca print (“Hello, Python!”) # \u7b2c\u4e8c\u4e2a\u6ce8\u91ca<\/p>\n\n\n\n
    \u6267\u884c\u4ee5\u4e0a\u4ee3\u7801\uff0c\u8f93\u51fa\u7ed3\u679c\u4e3a\uff1a<\/p>\n\n\n\n
    Hello, Python!<\/pre>\n\n\n\n
    \u591a\u884c\u6ce8\u91ca\u53ef\u4ee5\u7528\u591a\u4e2a #<\/strong> \u53f7\uff0c\u8fd8\u6709 ”’<\/strong> \u548c “””<\/strong>\uff1a<\/p>\n\n\n\n
    \u5b9e\u4f8b(Python 3.0+)<\/h2>\n\n\n\n
    #!\/usr\/bin\/python3 # \u7b2c\u4e00\u4e2a\u6ce8\u91ca # \u7b2c\u4e8c\u4e2a\u6ce8\u91ca ”’ \u7b2c\u4e09\u6ce8\u91ca \u7b2c\u56db\u6ce8\u91ca ”’ “”” \u7b2c\u4e94\u6ce8\u91ca \u7b2c\u516d\u6ce8\u91ca “”” print (“Hello, Python!”)<\/p>\n\n\n\n
    \u6267\u884c\u4ee5\u4e0a\u4ee3\u7801\uff0c\u8f93\u51fa\u7ed3\u679c\u4e3a\uff1a<\/p>\n\n\n\n
    Hello, Python!<\/pre>\n\n\n\n
    \n\n\n\n
    \u884c\u4e0e\u7f29\u8fdb<\/h2>\n\n\n\n
    python\u6700\u5177\u7279\u8272\u7684\u5c31\u662f\u4f7f\u7528\u7f29\u8fdb\u6765\u8868\u793a\u4ee3\u7801\u5757\uff0c\u4e0d\u9700\u8981\u4f7f\u7528\u5927\u62ec\u53f7 {}<\/strong> \u3002<\/p>\n\n\n\n
    \u7f29\u8fdb\u7684\u7a7a\u683c\u6570\u662f\u53ef\u53d8\u7684\uff0c\u4f46\u662f\u540c\u4e00\u4e2a\u4ee3\u7801\u5757\u7684\u8bed\u53e5\u5fc5\u987b\u5305\u542b\u76f8\u540c\u7684\u7f29\u8fdb\u7a7a\u683c\u6570\u3002\u5b9e\u4f8b\u5982\u4e0b\uff1a<\/p>\n\n\n\n
    \u5b9e\u4f8b(Python 3.0+)<\/h2>\n\n\n\n
    if True: print (“True”) else: print (“False”)<\/p>\n\n\n\n
    \u4ee5\u4e0b\u4ee3\u7801\u6700\u540e\u4e00\u884c\u8bed\u53e5\u7f29\u8fdb\u6570\u7684\u7a7a\u683c\u6570\u4e0d\u4e00\u81f4\uff0c\u4f1a\u5bfc\u81f4\u8fd0\u884c\u9519\u8bef\uff1a<\/p>\n\n\n\n
    \u5b9e\u4f8b<\/h2>\n\n\n\n
    if<\/strong> True:
     print<\/strong> (“Answer”)
     print<\/strong> (“True”)
    else<\/strong>:
     print<\/strong> (“Answer”)
     print<\/strong> (“False”) # \u7f29\u8fdb\u4e0d\u4e00\u81f4\uff0c\u4f1a\u5bfc\u81f4\u8fd0\u884c\u9519\u8bef<\/p>\n\n\n\n
    \u4ee5\u4e0a\u7a0b\u5e8f\u7531\u4e8e\u7f29\u8fdb\u4e0d\u4e00\u81f4\uff0c\u6267\u884c\u540e\u4f1a\u51fa\u73b0\u7c7b\u4f3c\u4ee5\u4e0b\u9519\u8bef\uff1a<\/p>\n\n\n\n
     File \"test.py\", line 6\n    print (\"False\")    # \u7f29\u8fdb\u4e0d\u4e00\u81f4\uff0c\u4f1a\u5bfc\u81f4\u8fd0\u884c\u9519\u8bef\n                                      ^\nIndentationError: unindent does not match any outer indentation level<\/pre>\n\n\n\n
    \n\n\n\n
    \u591a\u884c\u8bed\u53e5<\/h2>\n\n\n\n
    Python \u901a\u5e38\u662f\u4e00\u884c\u5199\u5b8c\u4e00\u6761\u8bed\u53e5\uff0c\u4f46\u5982\u679c\u8bed\u53e5\u5f88\u957f\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u53cd\u659c\u6760 \\<\/strong> \u6765\u5b9e\u73b0\u591a\u884c\u8bed\u53e5\uff0c\u4f8b\u5982\uff1a<\/p>\n\n\n\n
    total = item_one + \\\n        item_two + \\\n        item_three<\/pre>\n\n\n\n
    \u5b9e\u4f8b<\/h2>\n\n\n\n
    item_one = 1
    item_two = 2
    item_three = 3
    total = item_one + \\
            item_two + \\
            item_three
    print<\/strong>(total) # \u8f93\u51fa\u4e3a 6<\/p>\n\n\n\n
    \u5728 [], {}, \u6216 () \u4e2d\u7684\u591a\u884c\u8bed\u53e5\uff0c\u4e0d\u9700\u8981\u4f7f\u7528\u53cd\u659c\u6760 \\<\/strong>\uff0c\u4f8b\u5982\uff1a<\/p>\n\n\n\n
    total = ['item_one', 'item_two', 'item_three',\n        'item_four', 'item_five']<\/pre>\n\n\n\n
    \n\n\n\n
    \u6570\u5b57(Number)\u7c7b\u578b<\/h2>\n\n\n\n
    python\u4e2d\u6570\u5b57\u6709\u56db\u79cd\u7c7b\u578b\uff1a\u6574\u6570\u3001\u5e03\u5c14\u578b\u3001\u6d6e\u70b9\u6570\u548c\u590d\u6570\u3002<\/p>\n\n\n\n
      \n
    • int<\/strong>\u00a0(\u6574\u6570), \u5982 1, \u53ea\u6709\u4e00\u79cd\u6574\u6570\u7c7b\u578b int\uff0c\u8868\u793a\u4e3a\u957f\u6574\u578b\uff0c\u6ca1\u6709 python2 \u4e2d\u7684 Long\u3002<\/li>\n\n\n\n
    • bool<\/strong>\u00a0(\u5e03\u5c14), \u5982 True\u3002<\/li>\n\n\n\n
    • float<\/strong>\u00a0(\u6d6e\u70b9\u6570), \u5982 1.23\u30013E-2<\/li>\n\n\n\n
    • complex<\/strong>\u00a0(\u590d\u6570) – \u590d\u6570\u7531\u5b9e\u90e8\u548c\u865a\u90e8\u7ec4\u6210\uff0c\u5f62\u5f0f\u4e3a a + bj\uff0c\u5176\u4e2d a \u662f\u5b9e\u90e8\uff0cb \u662f\u865a\u90e8\uff0cj \u8868\u793a\u865a\u6570\u5355\u4f4d\u3002\u5982 1 + 2j\u3001 1.1 + 2.2j<\/li>\n<\/ul>\n\n\n\n
      \n\n\n\n
      \u5b57\u7b26\u4e32(String)<\/h2>\n\n\n\n
        \n
      • Python \u4e2d\u5355\u5f15\u53f7\u00a0‘<\/strong>\u00a0\u548c\u53cc\u5f15\u53f7\u00a0“<\/strong>\u00a0\u4f7f\u7528\u5b8c\u5168\u76f8\u540c\u3002<\/li>\n\n\n\n
      • \u4f7f\u7528\u4e09\u5f15\u53f7(”’<\/strong>\u00a0\u6216\u00a0“””<\/strong>)\u53ef\u4ee5\u6307\u5b9a\u4e00\u4e2a\u591a\u884c\u5b57\u7b26\u4e32\u3002<\/li>\n\n\n\n
      • \u8f6c\u4e49\u7b26\u00a0\\<\/strong>\u3002<\/li>\n\n\n\n
      • \u53cd\u659c\u6760\u53ef\u4ee5\u7528\u6765\u8f6c\u4e49\uff0c\u4f7f\u7528\u00a0r<\/strong>\u00a0\u53ef\u4ee5\u8ba9\u53cd\u659c\u6760\u4e0d\u53d1\u751f\u8f6c\u4e49\u3002 \u5982\u00a0r”this is a line with \\n”<\/strong>\u00a0\u5219\u00a0\\n<\/strong>\u00a0\u4f1a\u663e\u793a\uff0c\u5e76\u4e0d\u662f\u6362\u884c\u3002<\/li>\n\n\n\n
      • \u6309\u5b57\u9762\u610f\u4e49\u7ea7\u8054\u5b57\u7b26\u4e32\uff0c\u5982\u00a0“this ” “is ” “string”<\/strong>\u00a0\u4f1a\u88ab\u81ea\u52a8\u8f6c\u6362\u4e3a\u00a0this is string<\/strong>\u3002<\/li>\n\n\n\n
      • \u5b57\u7b26\u4e32\u53ef\u4ee5\u7528\u00a0+<\/strong>\u00a0\u8fd0\u7b97\u7b26\u8fde\u63a5\u5728\u4e00\u8d77\uff0c\u7528\u00a0*<\/strong>\u00a0\u8fd0\u7b97\u7b26\u91cd\u590d\u3002<\/li>\n\n\n\n
      • Python \u4e2d\u7684\u5b57\u7b26\u4e32\u6709\u4e24\u79cd\u7d22\u5f15\u65b9\u5f0f\uff0c\u4ece\u5de6\u5f80\u53f3\u4ee5\u00a00<\/strong>\u00a0\u5f00\u59cb\uff0c\u4ece\u53f3\u5f80\u5de6\u4ee5\u00a0-1<\/strong>\u00a0\u5f00\u59cb\u3002<\/li>\n\n\n\n
      • Python \u4e2d\u7684\u5b57\u7b26\u4e32\u4e0d\u80fd\u6539\u53d8\u3002<\/li>\n\n\n\n
      • Python \u6ca1\u6709\u5355\u72ec\u7684\u5b57\u7b26\u7c7b\u578b\uff0c\u4e00\u4e2a\u5b57\u7b26\u5c31\u662f\u957f\u5ea6\u4e3a 1 \u7684\u5b57\u7b26\u4e32\u3002<\/li>\n\n\n\n
      • \u5b57\u7b26\u4e32\u5207\u7247\u00a0str[start:end]<\/strong>\uff0c\u5176\u4e2d start\uff08\u5305\u542b\uff09\u662f\u5207\u7247\u5f00\u59cb\u7684\u7d22\u5f15\uff0cend\uff08\u4e0d\u5305\u542b\uff09\u662f\u5207\u7247\u7ed3\u675f\u7684\u7d22\u5f15\u3002<\/li>\n\n\n\n
      • \u5b57\u7b26\u4e32\u7684\u5207\u7247\u53ef\u4ee5\u52a0\u4e0a\u6b65\u957f\u53c2\u6570 step\uff0c\u8bed\u6cd5\u683c\u5f0f\u5982\u4e0b\uff1astr[start:end:step]<\/strong><\/li>\n<\/ul>\n\n\n\n
        word = '\u5b57\u7b26\u4e32'\nsentence = \"\u8fd9\u662f\u4e00\u4e2a\u53e5\u5b50\u3002\"\nparagraph = \"\"\"\u8fd9\u662f\u4e00\u4e2a\u6bb5\u843d\uff0c\n\u53ef\u4ee5\u7531\u591a\u884c\u7ec4\u6210\"\"\"<\/pre>\n\n\n\n
        \u5b9e\u4f8b(Python 3.0+)<\/h2>\n\n\n\n
        #!\/usr\/bin\/python3 str=’123456789′ print(str) # \u8f93\u51fa\u5b57\u7b26\u4e32 print(str[0:-1]) # \u8f93\u51fa\u7b2c\u4e00\u4e2a\u5230\u5012\u6570\u7b2c\u4e8c\u4e2a\u7684\u6240\u6709\u5b57\u7b26 print(str[0]) # \u8f93\u51fa\u5b57\u7b26\u4e32\u7b2c\u4e00\u4e2a\u5b57\u7b26 print(str[2:5]) # \u8f93\u51fa\u4ece\u7b2c\u4e09\u4e2a\u5f00\u59cb\u5230\u7b2c\u516d\u4e2a\u7684\u5b57\u7b26\uff08\u4e0d\u5305\u542b\uff09 print(str[2:]) # \u8f93\u51fa\u4ece\u7b2c\u4e09\u4e2a\u5f00\u59cb\u540e\u7684\u6240\u6709\u5b57\u7b26 print(str[1:5:2]) # \u8f93\u51fa\u4ece\u7b2c\u4e8c\u4e2a\u5f00\u59cb\u5230\u7b2c\u4e94\u4e2a\u4e14\u6bcf\u9694\u4e00\u4e2a\u7684\u5b57\u7b26\uff08\u6b65\u957f\u4e3a2\uff09 print(str * 2) # \u8f93\u51fa\u5b57\u7b26\u4e32\u4e24\u6b21 print(str + ‘\u4f60\u597d’) # \u8fde\u63a5\u5b57\u7b26\u4e32 print(‘——————————‘) print(‘hello\\nrunoob’) # \u4f7f\u7528\u53cd\u659c\u6760(\\)+n\u8f6c\u4e49\u7279\u6b8a\u5b57\u7b26 print(r’hello\\nrunoob’) # \u5728\u5b57\u7b26\u4e32\u524d\u9762\u6dfb\u52a0\u4e00\u4e2a r\uff0c\u8868\u793a\u539f\u59cb\u5b57\u7b26\u4e32\uff0c\u4e0d\u4f1a\u53d1\u751f\u8f6c\u4e49<\/p>\n\n\n\n
        \u8fd9\u91cc\u7684 r \u6307 raw\uff0c\u5373 raw string\uff0c\u4f1a\u81ea\u52a8\u5c06\u53cd\u659c\u6760\u8f6c\u4e49\uff0c\u4f8b\u5982\uff1a<\/p>\n\n\n\n
        >>> print('\\n')       # \u8f93\u51fa\u7a7a\u884c\n\n>>> print(r'\\n')      # \u8f93\u51fa \\n\n\\n\n>>><\/pre>\n\n\n\n
        \u4ee5\u4e0a\u5b9e\u4f8b\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n\n\n\n
        123456789\n12345678\n1\n345\n3456789\n24\n123456789123456789\n123456789\u4f60\u597d\n------------------------------\nhello\nrunoob\nhello\\nrunoob<\/pre>\n\n\n\n
        \n\n\n\n
        \u7a7a\u884c<\/h2>\n\n\n\n
        \u51fd\u6570\u4e4b\u95f4\u6216\u7c7b\u7684\u65b9\u6cd5\u4e4b\u95f4\u7528\u7a7a\u884c\u5206\u9694\uff0c\u8868\u793a\u4e00\u6bb5\u65b0\u7684\u4ee3\u7801\u7684\u5f00\u59cb\u3002\u7c7b\u548c\u51fd\u6570\u5165\u53e3\u4e4b\u95f4\u4e5f\u7528\u4e00\u884c\u7a7a\u884c\u5206\u9694\uff0c\u4ee5\u7a81\u51fa\u51fd\u6570\u5165\u53e3\u7684\u5f00\u59cb\u3002<\/p>\n\n\n\n
        \u7a7a\u884c\u4e0e\u4ee3\u7801\u7f29\u8fdb\u4e0d\u540c\uff0c\u7a7a\u884c\u5e76\u4e0d\u662f Python \u8bed\u6cd5\u7684\u4e00\u90e8\u5206\u3002\u4e66\u5199\u65f6\u4e0d\u63d2\u5165\u7a7a\u884c\uff0cPython \u89e3\u91ca\u5668\u8fd0\u884c\u4e5f\u4e0d\u4f1a\u51fa\u9519\u3002\u4f46\u662f\u7a7a\u884c\u7684\u4f5c\u7528\u5728\u4e8e\u5206\u9694\u4e24\u6bb5\u4e0d\u540c\u529f\u80fd\u6216\u542b\u4e49\u7684\u4ee3\u7801\uff0c\u4fbf\u4e8e\u65e5\u540e\u4ee3\u7801\u7684\u7ef4\u62a4\u6216\u91cd\u6784\u3002<\/p>\n\n\n\n
        \u8bb0\u4f4f\uff1a<\/strong>\u7a7a\u884c\u4e5f\u662f\u7a0b\u5e8f\u4ee3\u7801\u7684\u4e00\u90e8\u5206\u3002<\/p>\n\n\n\n
        \n\n\n\n
        \u7b49\u5f85\u7528\u6237\u8f93\u5165<\/h2>\n\n\n\n
        \u6267\u884c\u4e0b\u9762\u7684\u7a0b\u5e8f\u5728\u6309\u56de\u8f66\u952e\u540e\u5c31\u4f1a\u7b49\u5f85\u7528\u6237\u8f93\u5165\uff1a<\/p>\n\n\n\n
        \u5b9e\u4f8b(Python 3.0+)<\/h2>\n\n\n\n
        #!\/usr\/bin\/python3 input(“\\n\\n\u6309\u4e0b enter \u952e\u540e\u9000\u51fa\u3002”)<\/p>\n\n\n\n
        \u4ee5\u4e0a\u4ee3\u7801\u4e2d \uff0c\\n\\n<\/strong> \u5728\u7ed3\u679c\u8f93\u51fa\u524d\u4f1a\u8f93\u51fa\u4e24\u4e2a\u65b0\u7684\u7a7a\u884c\u3002\u4e00\u65e6\u7528\u6237\u6309\u4e0b enter<\/strong> \u952e\u65f6\uff0c\u7a0b\u5e8f\u5c06\u9000\u51fa\u3002<\/p>\n\n\n\n
        \n\n\n\n
        \u540c\u4e00\u884c\u663e\u793a\u591a\u6761\u8bed\u53e5<\/h2>\n\n\n\n
        Python \u53ef\u4ee5\u5728\u540c\u4e00\u884c\u4e2d\u4f7f\u7528\u591a\u6761\u8bed\u53e5\uff0c\u8bed\u53e5\u4e4b\u95f4\u4f7f\u7528\u5206\u53f7 ;<\/strong> \u5206\u5272\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u5b9e\u4f8b\uff1a<\/p>\n\n\n\n
        \u5b9e\u4f8b(Python 3.0+)<\/h2>\n\n\n\n
        #!\/usr\/bin\/python3 import sys; x = ‘runoob’; sys.stdout.write(x + ‘\\n’)<\/p>\n\n\n\n
        \u4f7f\u7528\u811a\u672c\u6267\u884c\u4ee5\u4e0a\u4ee3\u7801\uff0c\u8f93\u51fa\u7ed3\u679c\u4e3a\uff1a<\/p>\n\n\n\n
        runoob<\/pre>\n\n\n\n
        \u4f7f\u7528\u4ea4\u4e92\u5f0f\u547d\u4ee4\u884c\u6267\u884c\uff0c\u8f93\u51fa\u7ed3\u679c\u4e3a\uff1a<\/p>\n\n\n\n
        >>> import sys; x = 'runoob'; sys.stdout.write(x + '\\n')\nrunoob\n7<\/pre>\n\n\n\n
        \u6b64\u5904\u7684 7 \u8868\u793a\u5b57\u7b26\u6570\uff0crunoob<\/strong> \u6709 6 \u4e2a\u5b57\u7b26\uff0c\\n<\/strong> \u8868\u793a\u4e00\u4e2a\u5b57\u7b26\uff0c\u52a0\u8d77\u6765 7<\/strong> \u4e2a\u5b57\u7b26\u3002<\/p>\n\n\n\n
        >>> import sys\n>>> sys.stdout.write(\" hi \")    # hi \u524d\u540e\u5404\u6709 1 \u4e2a\u7a7a\u683c\n hi 4<\/pre>\n\n\n\n
        \n\n\n\n
        \u591a\u4e2a\u8bed\u53e5\u6784\u6210\u4ee3\u7801\u7ec4<\/h2>\n\n\n\n
        \u7f29\u8fdb\u76f8\u540c\u7684\u4e00\u7ec4\u8bed\u53e5\u6784\u6210\u4e00\u4e2a\u4ee3\u7801\u5757\uff0c\u6211\u4eec\u79f0\u4e4b\u4ee3\u7801\u7ec4\u3002<\/p>\n\n\n\n
        \u50cfif\u3001while\u3001def\u548cclass\u8fd9\u6837\u7684\u590d\u5408\u8bed\u53e5\uff0c\u9996\u884c\u4ee5\u5173\u952e\u5b57\u5f00\u59cb\uff0c\u4ee5\u5192\u53f7( : )\u7ed3\u675f\uff0c\u8be5\u884c\u4e4b\u540e\u7684\u4e00\u884c\u6216\u591a\u884c\u4ee3\u7801\u6784\u6210\u4ee3\u7801\u7ec4\u3002<\/p>\n\n\n\n
        \u6211\u4eec\u5c06\u9996\u884c\u53ca\u540e\u9762\u7684\u4ee3\u7801\u7ec4\u79f0\u4e3a\u4e00\u4e2a\u5b50\u53e5(clause)\u3002<\/p>\n\n\n\n
        \u5982\u4e0b\u5b9e\u4f8b\uff1a<\/p>\n\n\n\n
        if expression : \n   suite\nelif expression : \n   suite \nelse : \n   suite<\/pre>\n\n\n\n
        \n\n\n\n
        print \u8f93\u51fa<\/h2>\n\n\n\n
        print<\/strong> \u9ed8\u8ba4\u8f93\u51fa\u662f\u6362\u884c\u7684\uff0c\u5982\u679c\u8981\u5b9e\u73b0\u4e0d\u6362\u884c\u9700\u8981\u5728\u53d8\u91cf\u672b\u5c3e\u52a0\u4e0a end=””<\/strong>\uff1a<\/p>\n\n\n\n
        \u5b9e\u4f8b(Python 3.0+)<\/h2>\n\n\n\n
        #!\/usr\/bin\/python3 x=”a” y=”b” # \u6362\u884c\u8f93\u51fa print( x ) print( y ) print(‘———‘) # \u4e0d\u6362\u884c\u8f93\u51fa print( x, end=” ” ) print( y, end=” ” ) print()<\/p>\n\n\n\n
        \u4ee5\u4e0a\u5b9e\u4f8b\u6267\u884c\u7ed3\u679c\u4e3a\uff1a<\/p>\n\n\n\n
        a\nb\n---------\na b<\/pre>\n\n\n\n
        \n\n\n\n
        import \u4e0e from…import<\/h2>\n\n\n\n
        \u5728 python \u7528 import<\/strong> \u6216\u8005 from…import<\/strong> \u6765\u5bfc\u5165\u76f8\u5e94\u7684\u6a21\u5757\u3002<\/p>\n\n\n\n
        \u5c06\u6574\u4e2a\u6a21\u5757(somemodule)\u5bfc\u5165\uff0c\u683c\u5f0f\u4e3a\uff1a import somemodule<\/strong><\/p>\n\n\n\n
        \u4ece\u67d0\u4e2a\u6a21\u5757\u4e2d\u5bfc\u5165\u67d0\u4e2a\u51fd\u6570,\u683c\u5f0f\u4e3a\uff1a from somemodule import somefunction<\/strong><\/p>\n\n\n\n
        \u4ece\u67d0\u4e2a\u6a21\u5757\u4e2d\u5bfc\u5165\u591a\u4e2a\u51fd\u6570,\u683c\u5f0f\u4e3a\uff1a from somemodule import firstfunc, secondfunc, thirdfunc<\/strong><\/p>\n\n\n\n
        \u5c06\u67d0\u4e2a\u6a21\u5757\u4e2d\u7684\u5168\u90e8\u51fd\u6570\u5bfc\u5165\uff0c\u683c\u5f0f\u4e3a\uff1a from somemodule import *<\/strong><\/p>\n\n\n\n
        \u5bfc\u5165 sys \u6a21\u5757<\/h2>\n\n\n\n
        import sys print(‘================Python import mode==========================’) print (‘\u547d\u4ee4\u884c\u53c2\u6570\u4e3a:’) for i in sys.argv: print (i) print (‘\\n python \u8def\u5f84\u4e3a’,sys.path)<\/p>\n\n\n\n
        \u5bfc\u5165 sys \u6a21\u5757\u7684 argv,path \u6210\u5458<\/h2>\n\n\n\n
        from sys import argv,path # \u5bfc\u5165\u7279\u5b9a\u7684\u6210\u5458 print(‘================python from import===================================’) print(‘path:’,path) # \u56e0\u4e3a\u5df2\u7ecf\u5bfc\u5165path\u6210\u5458\uff0c\u6240\u4ee5\u6b64\u5904\u5f15\u7528\u65f6\u4e0d\u9700\u8981\u52a0sys.path<\/p>\n\n\n\n
        \n\n\n\n
        \u547d\u4ee4\u884c\u53c2\u6570<\/h2>\n\n\n\n
        \u5f88\u591a\u7a0b\u5e8f\u53ef\u4ee5\u6267\u884c\u4e00\u4e9b\u64cd\u4f5c\u6765\u67e5\u770b\u4e00\u4e9b\u57fa\u672c\u4fe1\u606f\uff0cPython\u53ef\u4ee5\u4f7f\u7528-h\u53c2\u6570\u67e5\u770b\u5404\u53c2\u6570\u5e2e\u52a9\u4fe1\u606f\uff1a<\/p>\n\n\n\n
        $ python -h\nusage: python [option] ... [-c cmd | -m mod | file | -] [arg] ...\nOptions and arguments (and corresponding environment variables):\n-c cmd : program passed in as string (terminates option list)\n-d     : debug output from parser (also PYTHONDEBUG=x)\n-E     : ignore environment variables (such as PYTHONPATH)\n-h     : print this help message and exit\n\n[ etc. ]<\/pre>\n","protected":false},"excerpt":{"rendered":"
        \u7f16\u7801 \u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0cPython3 \u6e90\u7801\u6587\u4ef6\u4ee5 UTF-8&...<\/p>\n","protected":false},"author":1,"featured_media":472,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-593","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-1"],"views":796,"_links":{"self":[{"href":"http:\/\/www.pyteam.cn\/index.php\/wp-json\/wp\/v2\/posts\/593","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.pyteam.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.pyteam.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.pyteam.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.pyteam.cn\/index.php\/wp-json\/wp\/v2\/comments?post=593"}],"version-history":[{"count":1,"href":"http:\/\/www.pyteam.cn\/index.php\/wp-json\/wp\/v2\/posts\/593\/revisions"}],"predecessor-version":[{"id":594,"href":"http:\/\/www.pyteam.cn\/index.php\/wp-json\/wp\/v2\/posts\/593\/revisions\/594"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/www.pyteam.cn\/index.php\/wp-json\/wp\/v2\/media\/472"}],"wp:attachment":[{"href":"http:\/\/www.pyteam.cn\/index.php\/wp-json\/wp\/v2\/media?parent=593"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.pyteam.cn\/index.php\/wp-json\/wp\/v2\/categories?post=593"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.pyteam.cn\/index.php\/wp-json\/wp\/v2\/tags?post=593"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}