Created by: zhiqiu

PR types

Breaking changes

PR changes

APIs

Describe

Refine paddle.unsqueeze

1. paddle.unsqueeze(input, axes, name=None) -> paddle.unsqueeze(x, axis, name=None)
2. axis supports int, list, tuple
3. dtype supports float32, float64, bool, int8, int32, int64, (and float16 on CUDAPlace).
4. refine document