code: def make_tree(statement, filename="<aexec>", symbol="single", local={}):
      
      # Create tree
      tree = ast.parse(CORO_CODE, filename, symbol)
      # Check expression statement
      if isinstance(statement, ast.Expr):
          tree.body[0].body[0].value.elts[0] = statement.value
      else:
          tree.body[0].body.insert(0, statement)
      # Check and return coroutine
      exec(compile(tree, filename, symbol))
      return tree
docs: Helper for *aexec*.