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numpy string operations | isdigit() function
  • Last Updated : 14 Jan, 2019
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numpy.core.defchararray.isdigit(arr) function returns True for each element if all characters in the string are digits and there is at least one character; returns false otherwise.

Parameters:
arr : array_like of str or unicode.

Returns : [ndarray] Output array of bools.

Code #1 :




# Python program explaining
# numpy.char.isdigit() 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.isdigit(in_arr)
print ("Output array: ", out_arr)
Output:



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

 
Code #2 :




# Python program explaining
# numpy.char.isdigit() 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.isdigit(in_arr)
print ("Output array: ", out_arr)
Output:
Input array :  ['1000 2' 'a1000' '1234 ab']
Output array:  [False False False]

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