numpy string operations | isdecimal() function

numpy.core.defchararray.isdecimal(arr) function returns True for each element if there are only decimal characters in the element.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.isdecimal() method

import numpy as geek

# input array contains only digits
in_arr = geek.array([ '1000', '2000'] )
print ("Input array : ", in_arr)

out_arr = geek.char.isdecimal(in_arr)
print ("Output array: ", out_arr)

Output:

Input array :  ['1000' '2000']
Output array:  [ True  True]

Code #2 :

# Python program explaining
# numpy.char.isdecimal() method

import numpy as geek

# input array contains digits along with space and alphabets
in_arr = geek.array([ '1000 2', 'a1000', '1234 ab'] )
print ("Input array : ", in_arr)

out_arr = geek.char.isdecimal(in_arr)
print ("Output array: ", out_arr)

Output:

Input array :  ['1000 2' 'a1000' '1234 ab']
Output array:  [False False False]