code: def test_using_errorcode(self):
      # Every key value in errno.errorcode should be on the module.
      for value in errno.errorcode.values():
          self.assertTrue(
              hasattr(errno, value), "no %s attr in errno" % value
          )
  
file_path: cpython/Lib/test/test_errno.py
imports: import errno
  import unittest
label_desc: Use image node_id 2 for calling the ErrnoAttributeTests obj's underlying member method code with example usage: obj.test_using_errorcode() without return types