How Can I Efficiently Replace Specific Semicolon Instances in a Python String?

Replacing Specific Character Instances in a String

The provided Python code fails to replace semicolons with colons due to the immutable nature of strings. The line line[i] = ":" triggers a type error because strings cannot be modified in-place.

Solution: Using Replace()

To overcome this limitation, Python provides the replace() method, which replaces all occurrences of a character with another. For example:

line = line.replace(';', ':')

This will replace all semicolons in line with colons.

Replacing Specific Occurrences

If only certain semicolons need to be replaced, more specific techniques are required. Slicing can be used to isolate the desired section of the string:

line = line[:10].replace(';', ':') + line[10:]

This code replaces semicolons in the first 10 characters of line.

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