construct AST CFG and DFG

[MrBlack0220]

hi,
Great Work!
I am writing to ask whether I can use naturalcc to construct AST CFG and DFG for python and java.
Thanks for your reply.

[whatsmyname]

How to generate ASTs for code: https://github.com/CGCL-codes/naturalcc/blob/master/ncc_dataset/ast_parser/tree_sitter/parser.py
As for CFG and DFG, @wanyao1992