operations with empty strings | find () function

numpy.core.defchararray.find (arr, sub, start = 0, end = None) — this is another function for doing string operations in numpy. It returns the lowest index in the string where the substring sub is found for each element in arr within the range starts and ends. Otherwise -1 is returned.

Parameters:
arr: array_like of str or unicode.
sub: [str or unicode] The substring which to be searched.
start: [int, optional] The starting location in each string.
end: [int, optional] The ending location in each string.

Returns: [ndarray] Output array of ints.

Code # 1:

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

 
# import numy as geek

import numpy as geek

 
# input arrays

in_arr = geek.array ([ `aAaAaA` , ` baA` , `abBABba` ])

print ( "Input array:" , in_arr) 

 
# output arrays

out_arr = geek.char.find (in_arr, sub = `A` )

print ( "Output array:" , out_arr ) 

Exit :

 Input array: [`aAaAaA`` baA` `abBABba`] Output array: [1 2 3] 

Code # 2:

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

 
# import numy as a geek

import numpy as geek

 
# input arrays

in_arr = geek.array ([ `aAaAaA` , `aA` , ` abBABba` ])

print ( " Input array: " , in_arr) 

 
# output arrays

out_arr = geek.char.find (in_arr, sub = `a` , start = 3 , end = 7 )

print ( "Output array:" , out_arr) 

Exit :

 Input array: [`aAaAaA`` aA` `abBABba`] Output array: [4 -1 6]