numpy string operations | lower() function

numpy.core.defchararray.lower(arr) function is used to return an array with the elements converted to lowercase.

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.

Code #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)

Output:

input array :  ['P4Q R' '4Q RP' 'Q RP4' 'RP4Q']
output lowercased array : ['p4q r' '4q rp' 'q rp4' 'rp4q']

Code #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 )

Output:

input array :  ['GEEKS' 'FOR' 'GEEKS']
output lowercased array : ['geeks' 'for' 'geeks']