code: def longer_match_exists(self, a, b, n):
      return any(
          b_part in a
          for b_part in [
              b[i : i + n + 1] for i in range(0, len(b) - n - 1)
          ]
      )
  
imports: import difflib
  from test.support import findfile
  import unittest
  import doctest
  import sys
label_desc: Use image node_id 1 for calling the TestFindLongest obj's underlying member method code with example usage: obj.longer_match_exists(a, b, n) and returns: any