code: def test_escapes(self):
      eq = self.assertEqual
      s = Template("$who likes to eat a bag of $$what worth $$100")
      eq(
          s.substitute(dict(who="tim", what="ham")),
          "tim likes to eat a bag of $what worth $100",
      )
      s = Template("$who likes $$")
      eq(s.substitute(dict(who="tim", what="ham")), "tim likes $")
  
imports: import unittest
  import string
  from string import Template
label_desc: Use image node_id 5 for calling the TestTemplate obj's underlying member method code with example usage: obj.test_escapes() without return types