Created by: liym27

PR types

New features

PR changes

Others

Describe

Add debugging and logging mechanism for dygraph to static graph

1. Add logs in the conversion of function, and unified log information, clear and easy to understand. For example:

2020-08-26 11:09:42,088-Level 2: Whitelist: <paddle.fluid.dygraph.nn.Linear object at 0x13306dd70> is part of Paddle module and does not have to be transformed.

2. Add function set_verbosity(level=0) for user to set the verbosity level for dygraph to static graph. There are two means to set the logging verbosity:

   1. Call function set_verbosity
   2. Set environment variable TRANSLATOR_VERBOSITY

3. Add function set_code_level(level) for user to set the level to print code from specific Ast Transformer.