code: def test_str_float(self):
      self.run_test(
          "def str_float(s): return float(s)",
          "0.000012",
          str_float=[str],
      )
  
imports: from pythran.tests import TestEnv
  from pythran.typing import List
  import unittest
label_desc: Use image node_id 47 for calling the TestStr obj's underlying member method code with example usage: obj.test_str_float() without return types