[Dy2Stat]Filter UserWarings while @to_static

[Aurelius84]

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[Dy2Stat]Filter UserWarings while @to_static

ONLY filter DeprecationWarning，it will not and shall not deal with other warnings.

Before:

The behavior of expression A * B has been unified with elementwise_mul(X, Y, axis=-1) from Paddle 2.0. If your code works well in the older versions but crashes in this version, try to use elementwise_mul(X, Y, axis=0) instead of A * B. This transitional warning will be dropped in the future.
  op_type, op_type, EXPRESSION_MAP[method_name]))
/workspace/env3.7/lib/python3.7/site-packages/paddle/fluid/layers/math_op_patch.py:381: UserWarning: /tmp/tmpf_v49bn0.py:28
The behavior of expression A * B has been unified with elementwise_mul(X, Y, axis=-1) from Paddle 2.0. If your code works well in the older versions but crashes in this version, try to use elementwise_mul(X, Y, axis=0) instead of A * B. This transitional warning will be dropped in the future.
  op_type, op_type, EXPRESSION_MAP[method_name]))
/workspace/env3.7/lib/python3.7/site-packages/paddle/fluid/layers/math_op_patch.py:381: UserWarning: /tmp/tmpnxpgupfo.py:10
The behavior of expression A + B has been unified with elementwise_add(X, Y, axis=-1) from Paddle 2.0. If your code works well in the older versions but crashes in this version, try to use elementwise_add(X, Y, axis=0) instead of A + B. This transitional warning will be dropped in the future.
  op_type, op_type, EXPRESSION_MAP[method_name]))
/workspace/env3.7/lib/python3.7/site-packages/paddle/fluid/layers/math_op_patch.py:381: UserWarning: /tmp/tmp0nglhird.py:9
The behavior of expression A * B has been unified with elementwise_mul(X, Y, axis=-1) from Paddle 2.0. If your code works well in the older versions but crashes in this version, try to use elementwise_mul(X, Y, axis=0) instead of A * B. This transitional warning will be dropped in the future.
  op_type, op_type, EXPRESSION_MAP[method_name]))
/workspace/env3.7/lib/python3.7/site-packages/paddle/fluid/layers/math_op_patch.py:381: UserWarning: /tmp/tmp0nglhird.py:28
The behavior of expression A * B has been unified with elementwise_mul(X, Y, axis=-1) from Paddle 2.0. If your code works well in the older versions but crashes in this version, try to use elementwise_mul(X, Y, axis=0) instead of A * B. This transitional warning will be dropped in the future.
  op_type, op_type, EXPRESSION_MAP[method_name]))
/workspace/env3.7/lib/python3.7/site-packages/paddle/fluid/layers/math_op_patch.py:381: UserWarning: /tmp/tmp_b_3skv4.py:10
The behavior of expression A + B has been unified with elementwise_add(X, Y, axis=-1) from Paddle 2.0. If your code works well in the older versions but crashes in this version, try to use elementwise_add(X, Y, axis=0) instead of A + B. This transitional warning will be dropped in the future.
  op_type, op_type, EXPRESSION_MAP[method_name]))

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[0x45f]

LGTM