:param str s: string with tabs
    :param str replace: e.g. 4 spaces
    :rtype: str

def replace_tab_indent(s, replace="    "):
    """
    :param str s: string with tabs
    :param str replace: e.g. 4 spaces
    :rtype: str
    """
    prefix = get_indent_prefix(s)
    return prefix.replace("\t", replace) + s[len(prefix):]