NumPy left_shift

所述 numpy.left_shift() 函数中的数组元素的二进制表示移动位通过指定的位置在左边。从右侧追加相等数量的0。

例如

import numpy as np

print 'Left shift of 10 by two positions:'
print np.left_shift(10,2)
print '\n'  

print 'Binary representation of 10:'
print np.binary_repr(10, width = 8)
print '\n'  

print 'Binary representation of 40:'
print np.binary_repr(40, width = 8)  
# Two bits in '00001010' are shifted to left and two 0s appended from right.

其输出如下

Left shift of 10 by two positions:
40

Binary representation of 10:
00001010

Binary representation of 40:
00101000