numpy string operations | lstrip() function

numpy string operations | strip() function

Last Updated : 17 Jan, 2019

numpy.core.defchararray.strip(arr, chars=None) is another function for doing string operations in numpy. It returns a copy with the leading and trailing characters removed for each element in arr.

Parameters:
arr : array_like of str or unicode.
char : [str or unicode, optional] the set of characters to be removed. If omitted or None, it removes whitespace. The chars argument is not a prefix or suffix; it is all combinations of its values which we want to strip.

Returns : [ndarray] Output array of str or unicode, depending on input type.

Code #1 :

# Python program explaining 
# numpy.char.strip() method  
  
import numpy as geek 
  
# input arrays   
in_arr = geek.array(['Sun', '  Moon  ', 'Star']) 
print ("Input array : ", in_arr)  
  
out_arr = geek.char.strip(in_arr) 
  
# whitespace removed from arr[1]  
# as we have set chars = None 
print ("Output array: ", out_arr)  

Output:

Input array :  ['Sun' ' Moon ' 'Star']
Output array:  ['Sun' 'Moon' 'Star']

Code #2 :

# Python program explaining 
# numpy.char.strip() method  
  
import numpy as geek 
  
# input arrays   
in_arr = geek.array(['Sun', '  Moon  ', 'Star']) 
print ("Input array : ", in_arr)  
  
out_arr = geek.char.strip(in_arr, chars ='Sun') 
  
# 'Sun' removed from arr[0] as we have set chars = Sun 
print ("Output array: ", out_arr)  

Output:

Input array :  ['Sun' ' Moon ' 'Star']
Output array:  ['' ' Moon ' 'tar']

Code #3 :

# Python program explaining 
# numpy.char.strip() method  
  
import numpy as geek 
  
# input arrays  
in_arr = geek.array([ 'Geeks', 'For', 'Geeks'] ) 
print ("Input array : ", in_arr)  
  
out_arr = geek.char.strip(in_arr, chars ='G') 
  
#'G' removed from arr[0] and arr[2] 
# as we have set chars ='G' 
print ("Output array: ", out_arr)  

Output:

Input array :  ['Geeks' 'For' 'Geeks']
Output array:  ['eeks' 'For' 'eeks']

numpy string operations | lstrip() function

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