show code info. For example, show how many branch in the function.
Count how many branch in the code object. Branch means any behavior like jump_if. For example, the statement like "if(...){XXX}" will generate the opcode "POP_JUMP_IF_FALSE". The function which have many branch means that it do many thing and it need many test case. The function never count anything about loop, like for.
Display number of branch for each function(or method) in module(or class).
Count how many loop in code object.