<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def find_window(self, highlight_locations):
 """Getting the HIGHLIGHT_NUM_CHARS_BEFORE_MATCH setting to find how many characters before the first word found should be removed from the window """


        if len(self.text_block) <= self.max_length:
            return (0, self.max_length)

        num_chars_before = getattr(
            settings,
            'HIGHLIGHT_NUM_CHARS_BEFORE_MATCH',
            0
        )

        best_start, best_end = super(ColabHighlighter, self).find_window(
            highlight_locations
        )
        if best_start <= num_chars_before:
            best_end -= best_start
            best_start = 0
        else:
            best_start -= num_chars_before
            best_end -= num_chars_before

        return (best_start, best_end)