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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _readline_insert(self, char, echo, insptr, line):
 """Deal properly with inserted chars in a line."""

        if not self._readline_do_echo(echo):
            return
        # Write out the remainder of the line
        self.write(char + ''.join(line[insptr:]))
        # Cursor Left to the current insert point
        char_count = len(line) - insptr
        self.write(self.CODES['CSRLEFT'] * char_count)