numpy string operations | zfill() function
Last Updated :
28 Jan, 2019
numpy.core.defchararray.zfill(arr, width) is another function for doing string operations in numpy. For each element in the array it returns the numeric string left-filled with zeros.The number of left filled zeros happen according to the width.
Parameters:
arr : array_like of str or unicode.Input array.
width : [int] The final width of the string after filling zeros.
Returns : [ndarray] Output array of str or unicode, depending on input type.
Code #1 :
import numpy as geek
in_arr = geek.array(['Geeks', 'for', 'Geeks'])
print ("Input array : ", in_arr)
width = 8
out_arr = geek.char.zfill(in_arr, width)
print ("Output array: ", out_arr)
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Output:
Input array : ['Geeks' 'for' 'Geeks']
Output array: ['000Geeks' '00000for' '000Geeks']
Code #2 :
import numpy as geek
in_arr = geek.array(['1', '11', '111'])
print ("Input array : ", in_arr)
width = 5
out_arr = geek.char.zfill(in_arr, width)
print ("Output array: ", out_arr)
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Output:
Input array : ['1' '11' '111']
Output array: ['00001' '00011' '00111']
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