numpy string operations | isupper() function Last Updated : 14 Jan, 2019 Comments Improve Suggest changes Like Article Like Report numpy.core.defchararray.isupper(arr) function returns True for each element if all cased characters in the string are uppercase and there is at least one character, it returns false otherwise. Parameters: arr : array_like of str or unicode Returns : [ndarray] Output array of bools. Code #1: Python3 # Python Program explaining # numpy.char.isupper() 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.isupper(in_arr) print ("output array :", out_arr) Output: input array : ['P4Q R' '4Q rP' 'Q rp4' 'rpq'] output array : [ True False False False] Code #2: Python3 # Python Program explaining # numpy.char.isupper() function import numpy as geek in_arr = geek.array(['GEEKS', 'for', 'Geeks']) print ("input array : ", in_arr) out_arr = geek.char.isupper(in_arr) print ("output array :", out_arr ) Output: input array : ['GEEKS' 'for' 'Geeks'] output array : [ True False False] Comment More infoAdvertise with us Next Article numpy string operations | islower() function J jana_sayantan Follow Improve Article Tags : Python Python-numpy Python numpy-String Operation Practice Tags : python Similar Reads numpy string operations | isnumeric() function numpy.core.defchararray.isnumeric(arr) function returns true for each element if there are only numeric characters and there is at least one character.It returns false otherwise. Parameters: arr : array_like of str or unicode. Returns : [ndarray] Output array of bools. Code #1 : Python3 # Python pro 1 min read numpy string operations | isnumeric() function numpy.core.defchararray.isnumeric(arr) function returns true for each element if there are only numeric characters and there is at least one character.It returns false otherwise. Parameters: arr : array_like of str or unicode. Returns : [ndarray] Output array of bools. Code #1 : Python3 # Python pro 1 min read numpy string operations | islower() function 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: Py 1 min read numpy string operations | islower() function 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: Py 1 min read 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: Python3 # Python 1 min read 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: Python3 # Python 1 min read Like