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numpy string operations | islower() function
  • Last Updated : 14 Jan, 2019

numpy.core.defchararray.islower(arr) function returns True for each element if all cased characters in the string are lowercase and there is at least one cased character, It returns false otherwise.

Parameters:
arr : array_like of str or unicode

Returns : [ndarray] Output array of bools.

Code #1:




# Python Program explaining
# numpy.char.islower() function 
  
import numpy as geek 
  
  
in_arr = geek.array(['P4Q R', '4Q rP', 'Q rp4', 'rpq'])
print ("input array : ", in_arr)
  
out_arr = geek.char.islower(in_arr)
print ("output  array :", out_arr)
Output:



input array :  ['P4Q R' '4Q rP' 'Q rp4' 'rpq']
output array : [False False False  True]

 
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.islower(in_arr)
print ("output array :", out_arr )
Output:
input array :  ['GEEKS' 'for' 'Geeks']
output array : [False  True False]

 

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