estimator with Multi-value Input

[T0L0ve]

想知道变长输入是如何使用tf.feature_column处理的，也是和sparse_feature一样的处理方式吗，但这样原来VarLenSparseFeat的maxlen参数就没有被使用到了。

[yanghailong-study]

同求，兄弟解决这个问题了吗

[shenweichen]

Closing this as covered by the merged docs update in #554.

The new Sequence Feature Cookbook consolidates the common sequence/VarLen/DIN/DSIN input conventions, including VarLenSparseFeat shapes, padding and length_name, embedding sharing, DIN/BST history fields, DSIN session inputs, and Estimator/TFRecord vector inputs.

Docs: https://deepctr-doc.readthedocs.io/en/latest/Sequence-Cookbook.html