code: def valid_error(self, network, value, **kwargs):
      self.valid.append(value)
  
imports: from __future__ import unicode_literals
  import time
  import progressbar
  from neupy.utils import iters
label_desc: Use image node_id 3 for calling the ErrorCollector obj's underlying member method code with example usage: obj.valid_error(network, value) without return types