code: def validate(self, value):
      super(PaddingProperty, self).validate(value)
  
      if isinstance(value, tuple) and len(value) != 2:
          raise ValueError(
              "Border mode property suppose to get a tuple that "
              "contains two elements, got {} elements"
              "".format(len(value))
          )
  
      is_invalid_string = (
          isinstance(value, six.string_types)
          and value not in self.valid_string_choices
      )
  
      if is_invalid_string:
          valid_choices = ", ".join(self.valid_string_choices)
          raise ValueError(
              "`{}` is invalid string value. Available choices: {}"
              "".format(value, valid_choices)
          )
  
      if isinstance(value, tuple) and any(
          element < 0 for element in value
      ):
          raise ValueError(
              "Tuple border mode value needs to contain only elements "
              "that greater or equal to zero, got {}".format(value)
          )
  
imports: from __future__ import division
  import math
  import collections
  import six
  import tensorflow
  from neupy import init
  from neupy.utils import as_tuple
  from neupy.exceptions import LayerConnectionError
  from neupy.core.properties import TypedListProperty, Property, ParameterProperty
  from .base import BaseLayer
label_desc: Use image node_id 2 for calling the PaddingProperty obj's underlying member method code with example usage: obj.validate(value) without return types