What is the numpy.char.replace() method from NumPy in Python?

Overview

In Python, the char.replace() function is used to return a copy of an array with all occurrences of the substring old replaced by the substring new.

Syntax

char.replace(a, old, new, count=None)

Parameter value

  • a: This represents the array of strings or Unicode.
  • old: This represents the old character of strings to be replaced.
  • new: This represents the new character of strings.
  • count: If this parameter value is given, only the first count occurrences are replaced.

Example

import numpy as np



# creating the input array

a = np.array(["Hi, what are you doing?"])

print("Old array:", end = " ")

print(a)



# creating the old character from the array of string

old = "are you"



# creating a new character of strings to replace the old strings

new = "is the boy"



# implementing the char.replace() function

myarray = np.char.replace(a, old, new)



print('New array:', end = " ")

print(myarray)

Explanation

  • Line 4: We define a sample string a.
  • Line 9: We define a string old, which is a substring of a.
  • Line 12: We define the new string, new, to replace old.
  • Line 15: We call the np.char.replace method and store the results in myarray, thereby changing the input array characters from "Hi, what are you doing" to "Hi, what is the boy doing?"

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