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Python - replace part of string from given index
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In this article, we would like to show you how to replace part of string from given index in Python.
Quick solution:
text = "ABCD"
replacement = "xy"
position = 1
number_of_characters = 2
result = text[:position] + replacement + text[position + number_of_characters:]
print(result) # AxyD
1. Practical example using string slicing with string concatenation
In this example, we use string slicing with string concatenation to replace CD letters (index 1-3) from the text with the replacement.
text = "ABCD"
replacement = "xy"
position = 1
number_of_characters = 2
result = text[:position] + replacement + text[position + number_of_characters:]
print(result) # AxyD
Output:
AxyD
Explanation:
| piece of code | equivalent to | letter |
|---|---|---|
text[:position] | text[0:1] | A |
text[position + number_of_characters:] | text[3:text.length] or text[3:4] | D |
2. Practical example using string slicing with join() method
In this example, we use string slicing with join() method to replace CD letters (index 1-3) from the text with the replacement.
text = "ABCD"
replacement = "xy"
position = 1
number_of_characters = 2
result = "".join((text[:position], replacement, text[position + number_of_characters:]))
print(result) # AxyD
Output:
AxyD