numpy字符串操作 |少（）函数

numpy.core.defchararray.less(arr1, arr2) 是另一个在 NumPy 中进行字符串操作的函数。它一一检查两个形状相同的字符串数组的元素，如果 arr1 的元素小于 arr2 的元素，即 arr1 < arr2 ，则返回True 。否则，它返回False 。

Parameters: 
arr1 : array_like of str or unicode.1st input array. 
arr2 : array_like of str or unicode.2nd input array.
Returns : [ndarray] Output array of bools, or a single bool if arr1 and arr2 are scalars.

代码#1：

Python3

# Python program explaining
# numpy.char.less() method
 
# importing numpy
import numpy as geek
 
# input arrays 
in_arr1 = geek.array('numpy')
print ("1st Input array : ", in_arr1)
 
in_arr2 = geek.array('number')
print ("2nd Input array : ", in_arr2) 
 
# checking if in_arr1 < in_arr2
out_arr = geek.char.less(in_arr1, in_arr2)
print ("Output array: ", out_arr)

输出：

1st Input array :  numpy
2nd Input array :  number
Output array:  False

代码#2：

Python3

# Python program explaining
# numpy.char.less() method
 
# importing numpy
import numpy as geek
 
# input arrays 
in_arr1 = geek.array(['Geeks', 'for', 'Geek', 'Numpy'])
print ("1st Input array : ", in_arr1)
 
in_arr2 = geek.array(['Geek', 'for', 'geek', 'numpy'])
print ("2nd Input array : ", in_arr2)
 
# checking if in_arr1 < in_arr2
out_arr = geek.char.less(in_arr1, in_arr2)
print ("Output array: ", out_arr)

输出：

1st Input array :  ['Geeks' 'for' 'Geek' 'Numpy']
2nd Input array :  ['Geek' 'for' 'geek' 'numpy']
Output array:  [False False  True  True]

代码#3：

Python3

# Python program explaining
# numpy.char.less() method
 
# importing numpy
import numpy as geek
 
# input arrays 
in_arr1 = geek.array(['10', '11', '122', '15'])
print ("1st Input array : ", in_arr1)
  
in_arr2 = geek.array(['10', '13', '121', '141'])
print ("2nd Input array : ", in_arr2)
 
# checking if in_arr1 < in_arr2
out_arr = geek.char.less(in_arr1, in_arr2)
print ("Output array: ", out_arr)

输出：

1st Input array :  ['10' '11' '122' '15']
2nd Input array :  ['10' '13' '121' '141']
Output array:  [False  True False False]