3 examples of 'python string replace character at index' in Python

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def replace_string(self, string, search_for, replace_with, count=-1):
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    """Replaces ``search_for`` in the given ``string`` with ``replace_with``.
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    ``search_for`` is used as a literal string. See `Replace String
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    Using Regexp` if more powerful pattern matching is needed.
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    If you need to just remove a string see `Remove String`.
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    If the optional argument ``count`` is given, only that many
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    occurrences from left are replaced. Negative ``count`` means
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    that all occurrences are replaced (default behaviour) and zero
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    means that nothing is done.
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    A modified version of the string is returned and the original
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    string is not altered.
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    Examples:
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    | ${str} =        | Replace String | Hello, world!  | world | tellus   |
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    | Should Be Equal | ${str}         | Hello, tellus! |       |          |
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    | ${str} =        | Replace String | Hello, world!  | l     | ${EMPTY} | count=1 |
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    | Should Be Equal | ${str}         | Helo, world!   |       |          |
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    """
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    count = self._convert_to_integer(count, 'count')
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    return string.replace(search_for, replace_with, count)

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def replace(string, old, new):
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    return string.replace(old, new)

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def replace_between(str, start, end, replace):
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    pos1 = str.find(start);
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    pos2 = str.find(end);
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    return str[0:pos1 + len(start)] + replace + str[pos2:]