error LNK2005: _main already defined in test.obj

err1 := fmt.Errorf("%s", "this is normal error")

macos报错OSError: dlopen(/Users/yanerrol/opt/anaconda3/envs/py366/lib/python3.6/site-packages/lightgbm/lib_lightgbm.so, 6): Library not loaded: /usr/local/opt/l...

plt.pcolormesh(x1,x2,grid_hat,cmap=cm_light)报警告 MatplotlibDeprecationWarning: shading=‘flat’ when X and Y have the same dimensions as C is deprecated since 3....

L(w,b) = frac{1}{n}sumn_{i=1}(wx{(i)}+b-y{(i)})2

键名：{{KaTeX parse error: Expected 'EOF', got '}' at position 4: key}̲} 键值：{{i}} 键索引：…index}}

我方主料号(internalmaterial):ktq_raw_06,其对应的MPN part number:ktq_raw_06_01.

The accuracy of prediction is: 0.9666666666666667 Feature importances: [0.002148238569679191, 0.0046703830672789074, 0.33366676380518245, 0.6595146145578594]

The accuracy of prediction is: 0.9666666666666667 Feature importances: [0.002148238569679191, 0.0046703830672789074, 0.33366676380518245, 0.6595146145578594]

可以利用大小堆，大堆长度从1开始，每次+1 大堆元素都比小堆的小，那么大堆顶的元素就是第k小的元素