{"id":38313,"date":"2025-05-20T09:17:52","date_gmt":"2025-05-20T01:17:52","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/38313.html"},"modified":"2025-05-20T09:17:52","modified_gmt":"2025-05-20T01:17:52","slug":"%e7%ac%a6%e5%90%88python%e9%a3%8e%e6%a0%bc%e7%9a%84%e5%af%b9%e8%b1%a1%e5%86%8d%e8%b0%88%e5%90%91%e9%87%8f%e7%b1%bb","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/38313.html","title":{"rendered":"\u7b26\u5408Python\u98ce\u683c\u7684\u5bf9\u8c61(\u518d\u8c08\u5411\u91cf\u7c7b)"},"content":{"rendered":"

\u518d\u8c08\u5411\u91cf\u7c7b<\/h2>\n

\u4e3a\u4e86\u8bf4\u660e\u7528\u4e8e\u751f\u6210\u5bf9\u8c61\u8868\u793a\u5f62\u5f0f\u7684\u4f17\u591a\u65b9\u6cd5，\u6211\u4eec\u5c06\u4f7f\u7528\u4e00\u4e2a Vector2d \u7c7b，\u5b83\u4e0e\u7b2c 1 \u7ae0\u4e2d\u7684\u7c7b\u4f3c\u3002\u8fd9\u4e00\u8282\u548c\u63a5\u4e0b\u6765\u7684\u51e0\u8282\u4f1a\u4e0d\u65ad\u5b9e \u73b0\u8fd9\u4e2a\u7c7b\u3002\u6211\u4eec\u671f\u671b Vector2d \u5b9e\u4f8b\u5177\u6709\u7684\u57fa\u672c\u884c\u4e3a\u5982\u793a\u4f8b 9-1 \u6240\u793a\u3002<\/p>\n

\u793a\u4f8b 9-1\u3000Vector2d \u5b9e\u4f8b\u6709\u591a\u79cd\u8868\u793a\u5f62\u5f0f<\/p>\n

>><\/span>><\/span> v1 =<\/span> Vector2d(<\/span>3<\/span>,<\/span> 4<\/span>)<\/span>
\n>><\/span>><\/span> print<\/span>(<\/span>v1.<\/span>x,<\/span> v1.<\/span>y)<\/span> \u278a
\n3.0<\/span> 4.0<\/span>
\n>><\/span>><\/span> x,<\/span> y =<\/span> v1 \u278b
\n>><\/span>><\/span> x,<\/span> y
\n(<\/span>3.0<\/span>,<\/span> 4.0<\/span>)<\/span>
\n>><\/span>><\/span> v1 \u278c
\nVector2d(<\/span>3.0<\/span>,<\/span> 4.0<\/span>)<\/span>
\n>><\/span>><\/span> v1_clone =<\/span> eval<\/span>(<\/span>repr<\/span>(<\/span>v1)<\/span>)<\/span> \u278d
\n>><\/span>><\/span> v1 ==<\/span> v1_clone \u278e
\nTrue<\/span>
\n>><\/span>><\/span> print<\/span>(<\/span>v1)<\/span> \u278f
\n(<\/span>3.0<\/span>,<\/span> 4.0<\/span>)<\/span>
\n>><\/span>><\/span> octets =<\/span> bytes<\/span>(<\/span>v1)<\/span> \u2790
\n>><\/span>><\/span> octets
\nb'd\\\\\\\\x00\\\\\\\\x00\\\\\\\\x00\\\\\\\\x00\\\\\\\\x00\\\\\\\\x00\\\\\\\\x08@\\\\\\\\x00\\\\\\\\x00\\\\\\\\x00\\\\\\\\x00\\\\\\\\x00\\\\\\\\x00\\\\\\\\x10@'<\/span>
\n>><\/span>><\/span> abs<\/span>(<\/span>v1)<\/span> \u2791
\n5.0<\/span>
\n>><\/span>><\/span> bool<\/span>(<\/span>v1)<\/span>,<\/span> bool<\/span>(<\/span>Vector2d(<\/span>0<\/span>,<\/span> 0<\/span>)<\/span>)<\/span> \u2792<\/p>\n

\u2776 Vector2d \u5b9e\u4f8b\u7684\u5206\u91cf\u53ef\u4ee5\u76f4\u63a5\u901a\u8fc7\u5c5e\u6027\u8bbf\u95ee（\u65e0\u9700\u8c03\u7528\u8bfb\u503c\u65b9 \u6cd5）\u3002 \u2777 Vector2d \u5b9e\u4f8b\u53ef\u4ee5\u62c6\u5305\u6210\u53d8\u91cf\u5143\u7ec4\u3002 \u2778 repr \u51fd\u6570\u8c03\u7528 Vector2d \u5b9e\u4f8b，\u5f97\u5230\u7684\u7ed3\u679c\u7c7b\u4f3c\u4e8e\u6784\u5efa\u5b9e\u4f8b\u7684\u6e90 \u7801\u3002 \u2779 \u8fd9\u91cc\u4f7f\u7528 eval \u51fd\u6570，\u8868\u660e repr \u51fd\u6570\u8c03\u7528 Vector2d \u5b9e\u4f8b\u5f97\u5230\u7684\u662f \u5bf9\u6784\u9020\u65b9\u6cd5\u7684\u51c6\u786e\u8868\u8ff0\u3002<\/p>\n

\u277a Vector2d \u5b9e\u4f8b\u652f\u6301\u4f7f\u7528 == \u6bd4\u8f83；\u8fd9\u6837\u4fbf\u4e8e\u6d4b\u8bd5\u3002 \u277b print \u51fd\u6570\u4f1a\u8c03\u7528 str \u51fd\u6570，\u5bf9 Vector2d \u6765\u8bf4，\u8f93\u51fa\u7684\u662f\u4e00\u4e2a\u6709 \u5e8f\u5bf9\u3002 \u277c bytes \u51fd\u6570\u4f1a\u8c03\u7528__bytes__ \u65b9\u6cd5，\u751f\u6210\u5b9e\u4f8b\u7684\u4e8c\u8fdb\u5236\u8868\u793a\u5f62\u5f0f\u3002 \u277d abs \u51fd\u6570\u4f1a\u8c03\u7528__abs__ \u65b9\u6cd5，\u8fd4\u56de Vector2d \u5b9e\u4f8b\u7684\u6a21\u3002 \u277e bool \u51fd\u6570\u4f1a\u8c03\u7528__bool__ \u65b9\u6cd5，\u5982\u679c Vector2d \u5b9e\u4f8b\u7684\u6a21\u4e3a\u96f6， \u8fd4\u56de False，\u5426\u5219\u8fd4\u56de True\u3002<\/p>\n

\u793a\u4f8b 9-1 \u4e2d\u7684 Vector2d \u7c7b\u5728 vector2d_v0.py \u6587\u4ef6\u4e2d\u5b9e\u73b0（\u89c1\u793a\u4f8b 9- 2）\u3002\u8fd9\u6bb5\u4ee3\u7801\u57fa\u4e8e\u793a\u4f8b 1-2，\u9664\u4e86 == \u4e4b\u5916（\u5728\u6d4b\u8bd5\u4e2d\u7528\u5f97\u5230），\u5176\u4ed6 \u4e2d\u7f00\u8fd0\u7b97\u7b26\u5c06\u5728\u7b2c 13 \u7ae0\u5b9e\u73b0\u3002\u73b0\u5728，Vector2d \u7528\u5230\u4e86\u51e0\u4e2a\u7279\u6b8a\u65b9\u6cd5， \u8fd9\u4e9b\u65b9\u6cd5\u63d0\u4f9b\u7684\u64cd\u4f5c\u662f Python \u9ad8\u624b\u671f\u5f85\u8bbe\u8ba1\u826f\u597d\u7684\u5bf9\u8c61\u6240\u63d0\u4f9b\u7684\u3002<\/p>\n

\u793a\u4f8b 9-2\u3000vector2d_v0.py：\u76ee\u524d\u5b9a\u4e49\u7684\u90fd\u662f\u7279\u6b8a\u65b9\u6cd5<\/p>\n

from array import array
\nimport math
\n class Vector2d:
\n typecode = 'd' \u278a
\n def __init__(self, x, y):
\n self.x = float(x) \u278b
\n self.y = float(y)
\n def __iter__(self):
\n return (i for i in (self.x, self.y)) \u278c
\n def __repr__(self):
\nclass_name = type(self).__name__
\n return '{}({!r}, {!r})'.format(class_name, *self) \u278d
\n def __str__(self):
\n return str(tuple(self)) \u278e
\n def __bytes__(self):
\n return (bytes([ord(self.typecode)]) + \u278f
\nbytes(array(self.typecode, self))) \u2790
\n def __eq__(self, other):
\n return tuple(self) == tuple(other) \u2791
\n def __abs__(self):
\n return math.hypot(self.x, self.y) \u2792
\n def __bool__(self):
\n return bool(abs(self)) \u2793<\/p>\n

\u2776 typecode \u662f\u7c7b\u5c5e\u6027，\u5728 Vector2d \u5b9e\u4f8b\u548c\u5b57\u8282\u5e8f\u5217\u4e4b\u95f4\u8f6c\u6362\u65f6\u4f7f \u7528\u3002 \u2777 \u5728__init__ \u65b9\u6cd5\u4e2d\u628a x \u548c y \u8f6c\u6362\u6210\u6d6e\u70b9\u6570，\u5c3d\u65e9\u6355\u83b7\u9519\u8bef，\u4ee5\u9632 \u8c03\u7528 Vector2d \u51fd\u6570\u65f6\u4f20\u5165\u4e0d\u5f53\u53c2\u6570\u3002 \u2778 \u5b9a\u4e49__iter__ \u65b9\u6cd5，\u628a Vector2d \u5b9e\u4f8b\u53d8\u6210\u53ef\u8fed\u4ee3\u7684\u5bf9\u8c61，\u8fd9\u6837\u624d \u80fd\u62c6\u5305（\u4f8b\u5982，x, y = my_vector）\u3002\u8fd9\u4e2a\u65b9\u6cd5\u7684\u5b9e\u73b0\u65b9\u5f0f\u5f88\u7b80\u5355， \u76f4\u63a5\u8c03\u7528\u751f\u6210\u5668\u8868\u8fbe\u5f0f\u4e00\u4e2a\u63a5\u4e00\u4e2a\u4ea7\u51fa\u5206\u91cf\u3002 \u8fd9\u4e00\u884c\u4e5f\u53ef\u4ee5\u5199\u6210 yield self.x; yield.self.y\u3002\u7b2c 14 \u7ae0\u4f1a\u8fdb\u4e00\u6b65\u8ba8\u8bba__iter__ \u7279\u6b8a\u65b9 \u6cd5\u3001\u751f\u6210\u5668\u8868\u8fbe\u5f0f\u548c yield \u5173\u952e\u5b57\u3002 \u2779__repr__ \u65b9\u6cd5\u4f7f\u7528 {!r} \u83b7\u53d6\u5404\u4e2a\u5206\u91cf\u7684\u8868\u793a\u5f62\u5f0f，\u7136\u540e\u63d2\u503c，\u6784 \u6210\u4e00\u4e2a\u5b57\u7b26\u4e32；\u56e0\u4e3a Vector2d \u5b9e\u4f8b\u662f\u53ef\u8fed\u4ee3\u7684\u5bf9\u8c61，\u6240\u4ee5 *self \u4f1a\u628a x \u548c y \u5206\u91cf\u63d0\u4f9b\u7ed9 format \u51fd\u6570\u3002 \u277a \u4ece\u53ef\u8fed\u4ee3\u7684 Vector2d \u5b9e\u4f8b\u4e2d\u53ef\u4ee5\u8f7b\u677e\u5730\u5f97\u5230\u4e00\u4e2a\u5143\u7ec4，\u663e\u793a\u4e3a\u4e00\u4e2a \u6709\u5e8f\u5bf9\u3002 \u277b \u4e3a\u4e86\u751f\u6210\u5b57\u8282\u5e8f\u5217，\u6211\u4eec\u628a typecode \u8f6c\u6362\u6210\u5b57\u8282\u5e8f\u5217，\u7136\u540e\u2026\u2026 \u277c \u2026\u2026\u8fed\u4ee3 Vector2d \u5b9e\u4f8b，\u5f97\u5230\u4e00\u4e2a\u6570\u7ec4，\u518d\u628a\u6570\u7ec4\u8f6c\u6362\u6210\u5b57\u8282\u5e8f \u5217\u3002 \u277d \u4e3a\u4e86\u5feb\u901f\u6bd4\u8f83\u6240\u6709\u5206\u91cf，\u5728\u64cd\u4f5c\u6570\u4e2d\u6784\u5efa\u5143\u7ec4\u3002\u5bf9 Vector2d \u5b9e\u4f8b\u6765 \u8bf4，\u53ef\u4ee5\u8fd9\u6837\u505a，\u4e0d\u8fc7\u4ecd\u6709\u95ee\u9898\u3002\u53c2\u89c1\u4e0b\u9762\u7684\u8b66\u544a\u3002 \u277e \u6a21\u662f x \u548c y \u5206\u91cf\u6784\u6210\u7684\u76f4\u89d2\u4e09\u89d2\u5f62\u7684\u659c\u8fb9\u957f\u3002 \u277f__bool__ \u65b9\u6cd5\u4f7f\u7528 abs(self) \u8ba1\u7b97\u6a21，\u7136\u540e\u628a\u7ed3\u679c\u8f6c\u6362\u6210\u5e03\u5c14 \u503c，\u56e0\u6b64，0.0 \u662f False，\u975e\u96f6\u503c\u662f True\u3002<\/p>\n

\u793a\u4f8b 9-2 \u4e2d\u7684__eq__ \u65b9\u6cd5，\u5728\u4e24\u4e2a\u64cd\u4f5c\u6570\u90fd\u662f Vector2d \u5b9e\u4f8b\u65f6\u53ef\u7528，\u4e0d\u8fc7\u62ff Vector2d \u5b9e\u4f8b\u4e0e\u5176\u4ed6\u5177\u6709\u76f8\u540c\u6570\u503c\u7684\u53ef\u8fed\u4ee3 \u5bf9\u8c61\u76f8\u6bd4，\u7ed3\u679c\u4e5f\u662f True（\u5982 Vector(3, 4) == [3, 4]）\u3002\u8fd9 \u4e2a\u884c\u4e3a\u53ef\u4ee5\u89c6\u4f5c\u7279\u6027，\u4e5f\u53ef\u4ee5\u89c6\u4f5c\u7f3a\u9677\u3002\u7b2c 13 \u7ae0\u8bb2\u5230\u8fd0\u7b97\u7b26\u91cd\u8f7d \u65f6\u624d\u80fd\u8fdb\u4e00\u6b65\u8ba8\u8bba\u3002<\/p>\n

\u6211\u4eec\u5df2\u7ecf\u5b9a\u4e49\u4e86\u5f88\u591a\u57fa\u672c\u65b9\u6cd5，\u4f46\u662f\u663e\u7136\u5c11\u4e86\u4e00\u4e2a\u64cd\u4f5c：\u4f7f\u7528 bytes() \u51fd\u6570\u751f\u6210\u7684\u4e8c\u8fdb\u5236\u8868\u793a\u5f62\u5f0f\u91cd\u5efa Vector2d \u5b9e\u4f8b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

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