code: def construct_scalar(self, node):
      if not isinstance(node, ScalarNode):
          raise ConstructorError(
              None,
              None,
              "expected a scalar node, but found %s" % node.id,
              node.start_mark,
          )
      return node.value
  
imports: from .error import *
  from .nodes import *
  import collections.abc, datetime, base64, binascii, re, sys, types
label_desc: Use image node_id 8 for calling the BaseConstructor obj's underlying member method code with example usage: obj.construct_scalar(node) and returns: node