code: def test_b64decode_padding_error(self):
      self.assertRaises(binascii.Error, base64.b64decode, b"abc")
      self.assertRaises(binascii.Error, base64.b64decode, "abc")
  
imports: import unittest
  import base64
  import binascii
  import os
  from array import array
  from test.support import os_helper
  from test.support import script_helper
label_desc: Use image node_id 8 for calling the BaseXYTestCase obj's underlying member method code with example usage: obj.test_b64decode_padding_error() without return types