'Will setup the assign operator for that variable.'

def setup_graph(self):

    all_vars = tf.global_variables()
    for v in all_vars:
        if (v.name == self.var_name):
            self.var = v
            break
    else:
        raise ValueError('{}    is    not    a    GLOBAL_VARIABLE    in    the    graph!'.format(self.var_name))
