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numpy string operations | isdecimal() function

Last Updated : 14 Jan, 2019

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]

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