code: def push_back(self, obj):
      self._pushed.append(obj)
  
imports: import sys
  import numpy
  import six
  from six.moves import cStringIO
  from .compat import optional_dep_ok
label_desc: Use image node_id 3 for calling the PushbackAdapter obj's underlying member method code with example usage: obj.push_back(obj) without return types