NumPy strings.replace()
The numpy.strings.replace() function replaces occurrences of a substring within each element of an array-like object. It returns a copy of the string with all or a specified number of occurrences replaced.
Syntax
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numpy.strings.replace(a, old, new, count=-1)Parameters
| Parameter | Type | Description |
|---|---|---|
a | array_like (bytes_ or str_ dtype) | The input array containing strings. |
old | array_like (bytes_ or str_ dtype) | The substring that needs to be replaced. |
new | array_like (bytes_ or str_ dtype) | The substring that replaces the old substring. |
count | array_like (int_ dtype), optional | Specifies the number of occurrences to replace. If set to -1 (default), all occurrences are replaced. |
Return Value
Returns an array with the replaced strings. The output array maintains the same dtype as the input.
Examples
1. Replacing a Substring in a Single String
We replace a specific substring in a single string element.
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import numpy as np
# Define a string
fruit = np.array("apple", dtype="str")
# Replace substring "pp" with "bb"
result = np.strings.replace(fruit, "pp", "bb")
# Print the result
print("Modified string:", result)Output:
Modified string: abble