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I'm learning python source code, I used to print info when I debug code, but it's not convenient. I want to print CST, AST, ByteCode with iPython, wirte some code, then print it's CST、AST、 BYTECODE, and then to read the source code.

But, I can't dump the CST tree which will transform to AST, I know I can print CST tree by modifying python source code, but how to dump the CST tree in iPython just like dumping AST with ast package.

1. get AST with ast package  
2. get ByteCode with dis package

3\. but how get cst??