n+e c91def6cbc
code format and update function signatures (#213)
Cherry-pick from #200 

- update the function signature
- format code-style
- move _compile into separate functions
- fix a bug in to_torch and to_numpy (Batch)
- remove None in action_range

In short, the code-format only contains function-signature style and `'` -> `"`. (pick up from [black](https://github.com/psf/black))
2020-09-12 15:39:01 +08:00
..
2020-09-06 23:05:33 +08:00