code: def test_standalone_underscore_at_begin(self):
      self.assertMarkdownRenders("_ foo_ bar", "<p>_ foo_ bar</p>")
  
imports: from markdown.test_tools import TestCase
label_desc: Use image node_id 15 for calling the TestNotEmphasis obj's underlying member method code with example usage: obj.test_standalone_underscore_at_begin() without return types