class_docstr: Test markdown.extensions.Extension. 
class_docstr_tok: ["Test","markdown.extensions.Extension","."]
code: def testSetConfigWithBadKey(self):
      # `self.ext.setConfig('bad', 'baz)` => `KeyError`
      self.assertRaises(KeyError, self.ext.setConfig, "bad", "baz")
  
imports: import unittest
  import markdown
label_desc: Use image node_id 7 for calling the TestExtensionClass obj's underlying member method code with example usage: obj.testSetConfigWithBadKey() without return types