'Returns the embedding used for the source sequence.'

@property
@templatemethod(u'source_embedding')
def source_embedding(self):

    return tf.get_variable(name=u'W', shape=[self.source_vocab_info.total_size, self.params[u'embedding.dim']], initializer=tf.random_uniform_initializer((- self.params[u'embedding.init_scale']), self.params[u'embedding.init_scale']))
