NumPy: Replace "PHP" with "Python" in the element of a given array

Last update on March 25 2025 12:20:58 (UTC/GMT +8 hours)

13. Replace "PHP" with "Python" in Strings

Write a NumPy program to replace "PHP" with "Python" in the element of a given array.

Sample Solution:

Python Code:

# Importing necessary library
import numpy as np

# Creating a NumPy array containing a single string
x = np.array(['PHP Exercises, Practice, Solution'], dtype=np.str)

# Displaying the original array
print("\nOriginal Array:")
print(x)

# Replacing "PHP" with "Python" in the string of the array
r = np.char.replace(x, "PHP", "Python")

# Displaying the updated array after replacing the substring
print("\nNew array:")
print(r) 

Sample Input:

(['PHP Exercises, Practice, Solution'], dtype=np.str)

Sample Output:

Original Array:
['PHP Exercises, Practice, Solution']

New array:
['Python Exercises, Practice, Solution']

Explanation:

In the above exercise –

x = np.array(['PHP Exercises, Practice, Solution'], dtype=np.str): This line creates a NumPy array x is created, which contains a single string element.

r = np.char.replace(x, "PHP", "Python"): In the above code replace() function is called, which takes three arguments:

• The first argument is the array of strings to operate on, in this case, x.
• The second argument is the substring to be replaced, in this case, "PHP".
• The third argument is the new substring to replace the old substring, in this case, "Python".

The replace() function returns a new NumPy array r with the same shape and data type as x, but with the specified replacements made. The output of the new array is ['Python Exercises, Practice, Solution'].

Pictorial Presentation:

For more Practice: Solve these Related Problems:

• Create a function that replaces all occurrences of the substring "PHP" with "Python" in a string array using np.char.replace.
• Implement a solution that performs case-insensitive replacement of "php" with "Python."
• Test the replacement function on an array containing multiple occurrences of "PHP" within a single string.
• Chain the replacement with trimming operations to ensure no extra whitespace is introduced.

Python-Numpy Code Editor:

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