numpy字符串操作 |较低()函数
numpy.core.defchararray.lower(arr)
函数用于返回一个数组,其中元素转换为小写。
Parameters:
arr : [ array_like ] Input array which may be str or unicode.
Returns : [ndarray] Output lowercased array of str or unicode, depending on input type.
代码#1:
# Python Program explaining
# numpy.char.lower() function
import numpy as geek
in_arr = geek.array(['P4Q R', '4Q RP', 'Q RP4', 'RP4Q'])
print ("input array : ", in_arr)
out_arr = geek.char.lower(in_arr)
print ("output lowercased array :", out_arr)
输出:
input array : ['P4Q R' '4Q RP' 'Q RP4' 'RP4Q']
output lowercased array : ['p4q r' '4q rp' 'q rp4' 'rp4q']
代码#2:
# Python Program explaining
# numpy.char.lower() function
import numpy as geek
in_arr = geek.array(['GEEKS', 'FOR', 'GEEKS'])
print ("input array : ", in_arr)
out_arr = geek.char.lower(in_arr)
print ("output lowercased array :", out_arr )
输出:
input array : ['GEEKS' 'FOR' 'GEEKS']
output lowercased array : ['geeks' 'for' 'geeks']