code: def do_ranges_intersect(begin, end, old_begin, old_end):
          
          return  (old_begin <= begin < old_end) or \
                  (old_begin < end <= old_end)   or \
                  (begin <= old_begin < end)     or \
                  (begin < old_end <= end)
docs: Determine if the two given memory address ranges intersect.
  
          @type  begin: int
          @param begin: Start address of the first range.
  
          @type  end: int
          @param end: End address of the first range.
  
          @type  old_begin: int
          @param old_begin: Start address of the second range.
  
          @type  old_end: int
          @param old_end: End address of the second range.
  
          @rtype:  bool
          @return: C{True} if the two ranges intersect, C{False} otherwise.