code: def test_linebreak_7643(self):
      for i in range(0x10000):
          lines = (chr(i) + "A").splitlines()
          if i in (
              0x0A,
              0x0B,
              0x0C,
              0x0D,
              0x85,
              0x1C,
              0x1D,
              0x1E,
              0x2028,
              0x2029,
          ):
              self.assertEqual(
                  len(lines), 2, r"\u%.4x should be a linebreak" % i
              )
          else:
              self.assertEqual(
                  len(lines), 1, r"\u%.4x should not be a linebreak" % i
              )
  
imports: import hashlib
  from http.client import HTTPException
  import sys
  import unicodedata
  import unittest
  from test.support import open_urlresource, requires_resource, script_helper, cpython_only, check_disallow_instantiation
label_desc: Use image node_id 9 for calling the UnicodeMiscTest obj's underlying member method code with example usage: obj.test_linebreak_7643() without return types