Python中的 numpy.floor_divide()

numpy.floor_divide(arr1, arr2, /, out = None , where = True , cast = ' same_kind ', order = ' K ', dtype = None ) ：

第一个数组中的数组元素除以第二个数组中的元素（所有元素都发生）。 arr1 和 arr2 必须具有相同的形状。
它等效于Python //运算符并与Python % （余数）函数配对，使得b = a % b + b * (a // b)向上舍入。

参数 ：

arr1     : [array_like]Input array or object which works as numerator.

arr2     : [array_like]Input array or object which works as denominator. 

out      : [ndarray, None, optional]Output array with same dimensions as
           Input array, placed with result.

**kwargs : Allows you to pass keyword variable length of argument to a function. 
            It is used when we want to handle named argument in a function.

where    : [array_like, optional]True value means to calculate the universal 
            functions(ufunc) at that position, False value means to leave the 
            value in the output alone.

返回 ：

An array with floor(x1 / x2)

代码 1：arr1 除以 arr2

# Python program explaining
# floor_divide() function
import numpy as np
  
# input_array
arr1 = [2, 2, 2, 2, 2]
arr2 = [2, 3, 4, 5, 6]
print ("arr1         : ", arr1)
print ("arr1         : ", arr2)
  
# output_array
out = np.floor_divide(arr1, arr2)
print ("\nOutput array : ", out)

输出 ：

arr1         :  [2, 2, 2, 2, 2]
arr1         :  [2, 3, 4, 5, 6]

Output array :  [1 0 0 0 0]

代码 2 ： arr1 的元素除以除数

# Python program explaining
# floor_divide() function
import numpy as np
  
# input_array
arr1 = [2, 7, 3, 11, 4]
divisor = 3
print ("arr1         : ", arr1)
  
# output_array
out = np.floor_divide(arr1, divisor)
print ("\nOutput array : ", out)

输出 ：

arr1         :  [2, 7, 3, 11, 4]

Output array :  [0 2 1 3 1]

代码 3：如果 arr2 有 -ve 元素，则 floor_divide 处理结果

# Python program explaining
# floor_divide() function
import numpy as np
  
# input_array
arr1 = [2, 6, 21, 21, 12]
arr2 = [2, 3, 4, -3, 6]
print ("arr1         : ", arr1)
print ("arr2         : ", arr2)
  
# output_array
out = np.floor_divide(arr1, arr2)
print ("\nOutput array : ", out)

输出 ：

arr1         :  [2, 6, 21, 21, 12]
arr2         :  [2, 3, 4, -3, 6]

Output array :  [ 1  2  5 -7  2]

参考 ：
https://docs.scipy.org/doc/numpy-1.13.0/reference/generated/numpy.floor_divide.html
.