{"id":1009671,"date":"2024-12-27T11:13:52","date_gmt":"2024-12-27T03:13:52","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1009671.html"},"modified":"2024-12-27T11:13:54","modified_gmt":"2024-12-27T03:13:54","slug":"python%e5%a6%82%e4%bd%95%e6%8f%90%e9%ab%98-%e7%9a%84%e7%b2%be%e5%ba%a6","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1009671.html","title":{"rendered":"Python\u5982\u4f55\u63d0\u9ad8 \u7684\u7cbe\u5ea6"},"content":{"rendered":"

\"Python\u5982\u4f55\u63d0\u9ad8<\/p>\n

Python\u63d0\u9ad8\u7cbe\u5ea6\u7684\u65b9\u6cd5\u5305\u62ec\uff1a\u4f7f\u7528decimal\u6a21\u5757\u3001\u4f7f\u7528fractions\u6a21\u5757\u3001\u589e\u52a0\u6d6e\u70b9\u6570\u4f4d\u6570\u3001\u5229\u7528NumPy\u5e93\u3002<\/strong> \u5728\u8fd9\u4e9b\u65b9\u6cd5\u4e2d\uff0c\u4f7f\u7528decimal\u6a21\u5757<\/strong>\u662f\u975e\u5e38\u6709\u6548\u7684\uff0c\u5b83\u5141\u8bb8\u7528\u6237\u63a7\u5236\u8ba1\u7b97\u4e2d\u7684\u7cbe\u5ea6\u548c\u820d\u5165\u65b9\u5f0f\u3002decimal\u6a21\u5757\u63d0\u4f9b\u4e86\u4e00\u4e2aDecimal\u6570\u636e\u7c7b\u578b\uff0c\u53ef\u4ee5\u7cbe\u786e\u5730\u8868\u793a\u5341\u8fdb\u5236\u6570\u5e76\u6267\u884c\u7cbe\u786e\u7684\u7b97\u672f\u8fd0\u7b97\uff0c\u4ece\u800c\u907f\u514d\u7531\u4e8e\u4e8c\u8fdb\u5236\u6d6e\u70b9\u6570\u8868\u793a\u6cd5\u5e26\u6765\u7684\u8bef\u5dee\u3002\u901a\u8fc7\u8bbe\u5b9aDecimal\u7684\u7cbe\u5ea6\uff0c\u53ef\u4ee5\u786e\u4fdd\u5728\u8ba1\u7b97\u8fc7\u7a0b\u4e2d\u4fdd\u6301\u6240\u9700\u7684\u7cbe\u786e\u5ea6\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u4f7f\u7528DECIMAL\u6a21\u5757<\/p>\n<\/p>\n

Python\u7684decimal\u6a21\u5757\u63d0\u4f9b\u4e86\u9ad8\u7cbe\u5ea6\u7684\u5341\u8fdb\u5236\u6d6e\u70b9\u6570\u8fd0\u7b97\u3002\u76f8\u6bd4\u4e8e\u666e\u901a\u7684\u6d6e\u70b9\u6570\uff0cDecimal\u7c7b\u578b\u53ef\u4ee5\u7cbe\u786e\u8868\u793a\u5c0f\u6570\uff0c\u907f\u514d\u4e86\u8bb8\u591a\u7531\u4e8e\u4e8c\u8fdb\u5236\u6d6e\u70b9\u6570\u8f6c\u6362\u5bfc\u81f4\u7684\u8bef\u5dee\u3002<\/p>\n<\/p>\n

    \n
  1. \n

    Decimal\u7684\u57fa\u672c\u7528\u6cd5<\/strong><\/p>\n<\/p>\n

    Decimal\u6a21\u5757\u5141\u8bb8\u7528\u6237\u6307\u5b9a\u8ba1\u7b97\u7684\u7cbe\u5ea6\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7getcontext().prec<\/code>\u6765\u8bbe\u7f6e\u5168\u5c40\u7684\u7cbe\u5ea6\u3002<\/p>\n<\/p>\n

    from decimal import Decimal, getcontext<\/p>\n
    getcontext().prec = 50<\/p>\n
    num1 = Decimal('1.123456789012345678901234567890')<\/p>\n
    num2 = Decimal('1.987654321098765432109876543210')<\/p>\n
    result = num1 + num2<\/p>\n
    print(result)<\/p>\n
    <\/code><\/pre>\n<\/p>\n
    \u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cDecimal\u901a\u8fc7\u7cbe\u786e\u7684\u5341\u8fdb\u5236\u8868\u793a\u6cd5\uff0c\u907f\u514d\u4e86\u4f20\u7edf\u6d6e\u70b9\u6570\u7684\u7cbe\u5ea6\u95ee\u9898\u3002<\/p>\n<\/p>\n<\/li>\n
  2. \n
    \u63a7\u5236\u820d\u5165\u65b9\u5f0f<\/strong><\/p>\n<\/p>\n
    Decimal\u6a21\u5757\u4e0d\u4ec5\u53ef\u4ee5\u63a7\u5236\u7cbe\u5ea6\uff0c\u8fd8\u53ef\u4ee5\u6307\u5b9a\u820d\u5165\u65b9\u5f0f\u3002\u901a\u8fc7getcontext().rounding<\/code>\uff0c\u53ef\u4ee5\u8bbe\u7f6e\u4e3a\u4e0d\u540c\u7684\u820d\u5165\u7b56\u7565\uff0c\u5982ROUND_UP, ROUND_DOWN\u7b49\u3002<\/p>\n<\/p>\n
    from decimal import ROUND_UP<\/p>\n
    getcontext().rounding = ROUND_UP<\/p>\n
    num = Decimal('1.2345')<\/p>\n
    rounded_num = num.quantize(Decimal('1.23'))<\/p>\n
    print(rounded_num)<\/p>\n
    <\/code><\/pre>\n<\/p>\n
    \u8fd9\u79cd\u7075\u6d3b\u6027\u4f7f\u5f97Decimal\u5728\u9ad8\u7cbe\u5ea6\u8ba1\u7b97\u548c\u91d1\u878d\u5e94\u7528\u4e2d\u975e\u5e38\u6709\u7528\u3002<\/p>\n<\/p>\n<\/li>\n<\/ol>\n
    \u4e8c\u3001\u4f7f\u7528FRACTIONS\u6a21\u5757<\/p>\n<\/p>\n
    Fractions\u6a21\u5757\u7528\u4e8e\u8868\u793a\u5206\u6570\uff0c\u80fd\u4ee5\u5206\u5b50\u548c\u5206\u6bcd\u7684\u5f62\u5f0f\u51c6\u786e\u8868\u793a\u6570\u503c\uff0c\u4ece\u800c\u907f\u514d\u6d6e\u70b9\u8fd0\u7b97\u5e26\u6765\u7684\u7cbe\u5ea6\u95ee\u9898\u3002<\/p>\n<\/p>\n
      \n
    1. \n
      \u521b\u5efa\u548c\u64cd\u4f5c\u5206\u6570<\/strong><\/p>\n<\/p>\n
      Fractions\u6a21\u5757\u5141\u8bb8\u7528\u6237\u521b\u5efa\u5206\u6570\u5e76\u8fdb\u884c\u7b97\u672f\u8fd0\u7b97\u3002\u901a\u8fc7\u8f93\u5165\u5206\u5b50\u548c\u5206\u6bcd\uff0c\u6216\u8005\u4e00\u4e2a\u5c0f\u6570\u6765\u521b\u5efaFraction\u5bf9\u8c61\u3002<\/p>\n<\/p>\n
      from fractions import Fraction<\/p>\n
      frac1 = Fraction(3, 7)<\/p>\n
      frac2 = Fraction('0.5')<\/p>\n
      result = frac1 + frac2<\/p>\n
      print(result)<\/p>\n
      <\/code><\/pre>\n<\/p>\n
      Fractions\u6a21\u5757\u4f1a\u81ea\u52a8\u7b80\u5316\u7ed3\u679c\u3002<\/p>\n<\/p>\n<\/li>\n
    2. \n
      \u4e0eDecimal\u7ed3\u5408\u4f7f\u7528<\/strong><\/p>\n<\/p>\n
      Fractions\u6a21\u5757\u53ef\u4ee5\u4e0eDecimal\u6a21\u5757\u7ed3\u5408\u4f7f\u7528\uff0c\u4ee5\u5b9e\u73b0\u66f4\u9ad8\u7684\u7cbe\u5ea6\u3002<\/p>\n<\/p>\n
      from fractions import Fraction<\/p>\n
      from decimal import Decimal<\/p>\n
      frac = Fraction(Decimal('1.1'))<\/p>\n
      print(frac)<\/p>\n
      <\/code><\/pre>\n<\/p>\n
      \u8fd9\u79cd\u7ec4\u5408\u5141\u8bb8\u7528\u6237\u5728\u9700\u8981\u65f6\u4f7f\u7528\u5c0f\u6570\u70b9\u8868\u793a\u6cd5\uff0c\u5e76\u5728\u9700\u8981\u65f6\u4f7f\u7528\u5206\u6570\u8868\u793a\u6cd5\u3002<\/p>\n<\/p>\n<\/li>\n<\/ol>\n
      \u4e09\u3001\u589e\u52a0\u6d6e\u70b9\u6570\u4f4d\u6570<\/p>\n<\/p>\n
      \u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u53ef\u4ee5\u901a\u8fc7\u589e\u52a0\u6d6e\u70b9\u6570\u7684\u4f4d\u6570\u6765\u63d0\u9ad8\u7cbe\u5ea6\u3002Python\u7684float<\/code>\u7c7b\u578b\u5728\u8bb8\u591a\u5e94\u7528\u4e2d\u5df2\u7ecf\u8db3\u591f\uff0c\u4f46\u662f\u5728\u9700\u8981\u66f4\u9ad8\u7cbe\u5ea6\u65f6\uff0cNumPy\u5e93\u63d0\u4f9b\u4e86\u989d\u5916\u7684\u9009\u9879\u3002<\/p>\n<\/p>\n
        \n
      1. \n
        \u4f7f\u7528NumPy\u7684\u9ad8\u7cbe\u5ea6\u6570\u636e\u7c7b\u578b<\/strong><\/p>\n<\/p>\n
        NumPy\u5e93\u63d0\u4f9b\u4e86\u591a\u79cd\u7cbe\u5ea6\u7684\u6d6e\u70b9\u7c7b\u578b\uff0c\u5982float64<\/code>, float128<\/code>\u7b49\u3002\u901a\u8fc7\u9009\u62e9\u66f4\u9ad8\u7cbe\u5ea6\u7684\u7c7b\u578b\uff0c\u53ef\u4ee5\u5728\u4e00\u5b9a\u8303\u56f4\u5185\u63d0\u9ad8\u8ba1\u7b97\u7cbe\u5ea6\u3002<\/p>\n<\/p>\n
        import numpy as np<\/p>\n
        num1 = np.float128(1.123456789012345678901234567890)<\/p>\n
        num2 = np.float128(1.987654321098765432109876543210)<\/p>\n
        result = num1 + num2<\/p>\n
        print(result)<\/p>\n
        <\/code><\/pre>\n<\/p>\n<\/li>\n
      2. \n
        \u6ce8\u610f\u4e8b\u9879<\/strong><\/p>\n<\/p>\n
        \u5c3d\u7ba1NumPy\u63d0\u4f9b\u4e86\u66f4\u9ad8\u7cbe\u5ea6\u7684\u6d6e\u70b9\u7c7b\u578b\uff0c\u4f46\u5176\u7cbe\u5ea6\u4ecd\u7136\u53d7\u9650\u4e8e\u5e95\u5c42\u786c\u4ef6\u548c\u64cd\u4f5c\u7cfb\u7edf\u7684\u652f\u6301\u3002\u5e76\u4e14\uff0c\u4f7f\u7528\u66f4\u9ad8\u7cbe\u5ea6\u7684\u6d6e\u70b9\u7c7b\u578b\u53ef\u80fd\u4f1a\u5bfc\u81f4\u6027\u80fd\u4e0b\u964d\u3002<\/p>\n<\/p>\n<\/li>\n<\/ol>\n
        \u56db\u3001\u5229\u7528NUMPY\u5e93<\/p>\n<\/p>\n
        NumPy\u662f\u4e00\u4e2a\u5f3a\u5927\u7684\u79d1\u5b66\u8ba1\u7b97\u5e93\uff0c\u63d0\u4f9b\u4e86\u591a\u79cd\u5de5\u5177\u6765\u5904\u7406\u9ad8\u7cbe\u5ea6\u8ba1\u7b97\u3002\u5728\u9700\u8981\u5927\u91cf\u6570\u636e\u8fd0\u7b97\u65f6\uff0cNumPy\u7684\u4f18\u52bf\u5c24\u4e3a\u660e\u663e\u3002<\/p>\n<\/p>\n
          \n
        1. \n
          \u4f7f\u7528NumPy\u6570\u7ec4<\/strong><\/p>\n<\/p>\n
          NumPy\u6570\u7ec4\u901a\u8fc7\u77e2\u91cf\u5316\u8fd0\u7b97\u663e\u8457\u63d0\u9ad8\u4e86\u8ba1\u7b97\u6548\u7387\u3002\u5728\u9700\u8981\u9ad8\u7cbe\u5ea6\u65f6\uff0c\u53ef\u4ee5\u7ed3\u5408NumPy\u7684\u6d6e\u70b9\u7c7b\u578b\u4f7f\u7528\u3002<\/p>\n<\/p>\n
          import numpy as np<\/p>\n
          array1 = np.array([1.123456789012345, 2.123456789012345], dtype=np.float64)<\/p>\n
          array2 = np.array([3.987654321098765, 4.987654321098765], dtype=np.float64)<\/p>\n
          result = array1 + array2<\/p>\n
          print(result)<\/p>\n
          <\/code><\/pre>\n<\/p>\n<\/li>\n
        2. \n
          NumPy\u4e2d\u7684\u5e7f\u64ad\u673a\u5236<\/strong><\/p>\n<\/p>\n
          NumPy\u7684\u5e7f\u64ad\u673a\u5236\u5141\u8bb8\u5728\u4e0d\u540c\u5f62\u72b6\u7684\u6570\u7ec4\u4e4b\u95f4\u8fdb\u884c\u8fd0\u7b97\uff0c\u81ea\u52a8\u6269\u5c55\u8f83\u5c0f\u7684\u6570\u7ec4\u4ee5\u5339\u914d\u8f83\u5927\u7684\u6570\u7ec4\u3002\u8fd9\u79cd\u673a\u5236\u5728\u5904\u7406\u9ad8\u7cbe\u5ea6\u8ba1\u7b97\u65f6\u975e\u5e38\u6709\u7528\u3002<\/p>\n<\/p>\n
          import numpy as np<\/p>\n
          array = np.array([1.123456789012345, 2.123456789012345], dtype=np.float64)<\/p>\n
          scalar = np.float64(1.5)<\/p>\n
          result = array * scalar<\/p>\n
          print(result)<\/p>\n
          <\/code><\/pre>\n<\/p>\n<\/li>\n<\/ol>\n
          \u4e94\u3001\u603b\u7ed3<\/p>\n<\/p>\n
          \u63d0\u9ad8Python\u8ba1\u7b97\u7cbe\u5ea6\u7684\u65b9\u6cd5\u591a\u79cd\u591a\u6837\uff0c\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\u53d6\u51b3\u4e8e\u5177\u4f53\u5e94\u7528\u573a\u666f\u3002\u5bf9\u4e8e\u9700\u8981\u9ad8\u7cbe\u5ea6\u7684\u5c0f\u6570\u8fd0\u7b97\uff0cdecimal\u6a21\u5757<\/strong>\u662f\u4e00\u4e2a\u7406\u60f3\u7684\u9009\u62e9\uff1b\u5bf9\u4e8e\u6d89\u53ca\u5206\u6570\u7684\u8fd0\u7b97\uff0cfractions\u6a21\u5757<\/strong>\u63d0\u4f9b\u4e86\u7cbe\u786e\u7684\u8868\u793a\u65b9\u5f0f\uff1b\u800c\u5728\u9700\u8981\u5904\u7406\u5927\u91cf\u6570\u636e\u548c\u9ad8\u6548\u8ba1\u7b97\u65f6\uff0cNumPy\u5e93<\/strong>\u662f\u975e\u5e38\u6709\u7528\u7684\u5de5\u5177\u3002\u901a\u8fc7\u5408\u7406\u5730\u7ec4\u5408\u8fd9\u4e9b\u65b9\u6cd5\uff0c\u53ef\u4ee5\u5728Python\u4e2d\u5b9e\u73b0\u66f4\u9ad8\u7cbe\u5ea6\u7684\u8ba1\u7b97\uff0c\u6ee1\u8db3\u4e0d\u540c\u5e94\u7528\u573a\u666f\u7684\u9700\u6c42\u3002<\/p>\n<\/p>\n
          \u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
           \u5982\u4f55\u5728Python\u4e2d\u63d0\u9ad8\u6570\u503c\u8ba1\u7b97\u7684\u7cbe\u5ea6\uff1f<\/strong>
          \u5728Python\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528\u9ad8\u7cbe\u5ea6\u7684\u6570\u503c\u5e93\u5982decimal<\/code>\u548cfractions<\/code>\u6765\u63d0\u9ad8\u8ba1\u7b97\u7cbe\u5ea6\u3002decimal<\/code>\u6a21\u5757\u63d0\u4f9b\u4e86\u5bf9\u5341\u8fdb\u5236\u6d6e\u70b9\u6570\u7684\u652f\u6301\uff0c\u5141\u8bb8\u7528\u6237\u8bbe\u7f6e\u6240\u9700\u7684\u7cbe\u5ea6\uff0c\u800cfractions<\/code>\u6a21\u5757\u5219\u5141\u8bb8\u8fdb\u884c\u5206\u6570\u8fd0\u7b97\uff0c\u907f\u514d\u6d6e\u70b9\u6570\u7cbe\u5ea6\u4e22\u5931\u3002\u6b64\u5916\uff0c\u4f7f\u7528NumPy\u5e93\u4e2d\u7684\u9ad8\u7cbe\u5ea6\u6570\u636e\u7c7b\u578b\u4e5f\u53ef\u4ee5\u63d0\u5347\u6570\u503c\u8ba1\u7b97\u7684\u51c6\u786e\u6027\u3002<\/p>\n
          \u5728Python\u4e2d\uff0c\u5982\u4f55\u5904\u7406\u6d6e\u70b9\u6570\u7cbe\u5ea6\u95ee\u9898\uff1f<\/strong>
          \u6d6e\u70b9\u6570\u7cbe\u5ea6\u95ee\u9898\u901a\u5e38\u6e90\u4e8e\u4e8c\u8fdb\u5236\u8868\u793a\u7684\u9650\u5236\u3002\u4e3a\u4e86\u5904\u7406\u8fd9\u4e00\u95ee\u9898\uff0c\u53ef\u4ee5\u4f7f\u7528round()<\/code>\u51fd\u6570\u5bf9\u7ed3\u679c\u8fdb\u884c\u56db\u820d\u4e94\u5165\uff0c\u6216\u4f7f\u7528math.isclose()<\/code>\u51fd\u6570\u6765\u6bd4\u8f83\u4e24\u4e2a\u6d6e\u70b9\u6570\u662f\u5426\u76f8\u7b49\u3002\u6b64\u5916\uff0c\u5229\u7528numpy<\/code>\u5e93\u4e2d\u7684set_printoptions<\/code>\u65b9\u6cd5\u53ef\u4ee5\u63a7\u5236\u8f93\u51fa\u7684\u7cbe\u5ea6\uff0c\u786e\u4fdd\u5728\u9700\u8981\u65f6\u663e\u793a\u66f4\u591a\u6709\u6548\u6570\u5b57\u3002<\/p>\n
          \u4f7f\u7528Python\u8fdb\u884c\u79d1\u5b66\u8ba1\u7b97\u65f6\uff0c\u5982\u4f55\u9009\u62e9\u5408\u9002\u7684\u5e93\u4ee5\u63d0\u9ad8\u7cbe\u5ea6\uff1f<\/strong>
          \u5bf9\u4e8e\u79d1\u5b66\u8ba1\u7b97\uff0c\u5efa\u8bae\u4f7f\u7528numpy<\/code>\u548cscipy<\/code>\u8fd9\u4e24\u4e2a\u5e93\u3002numpy<\/code>\u63d0\u4f9b\u4e86\u591a\u79cd\u6570\u636e\u7c7b\u578b\uff0c\u53ef\u4ee5\u9009\u62e9\u9ad8\u7cbe\u5ea6\u7684\u6d6e\u70b9\u6570\u7c7b\u578b\uff1b\u800cscipy<\/code>\u5219\u5305\u542b\u4e86\u4e30\u5bcc\u7684\u6570\u5b66\u51fd\u6570\u548c\u7b97\u6cd5\uff0c\u9002\u7528\u4e8e\u5404\u79cd\u7cbe\u5bc6\u8ba1\u7b97\u4efb\u52a1\u3002\u5982\u679c\u9700\u8981\u66f4\u9ad8\u7684\u7cbe\u5ea6\uff0c\u53ef\u4ee5\u8003\u8651\u4f7f\u7528mpmath<\/code>\u5e93\uff0c\u5b83\u652f\u6301\u4efb\u610f\u7cbe\u5ea6\u7684\u6d6e\u70b9\u7b97\u672f\u8fd0\u7b97\uff0c\u9002\u5408\u5904\u7406\u590d\u6742\u7684\u6570\u5b66\u95ee\u9898\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"Python\u63d0\u9ad8\u7cbe\u5ea6\u7684\u65b9\u6cd5\u5305\u62ec\uff1a\u4f7f\u7528decimal\u6a21\u5757\u3001\u4f7f\u7528fractions\u6a21\u5757\u3001\u589e\u52a0\u6d6e\u70b9\u6570\u4f4d\u6570\u3001\u5229\u7528Num […]","protected":false},"author":3,"featured_media":1009676,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1009671"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=1009671"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1009671\/revisions"}],"predecessor-version":[{"id":1009677,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1009671\/revisions\/1009677"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/1009676"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=1009671"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=1009671"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=1009671"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}