change repo structure; modify readme

tensorneat/problem/base.py

@@ -0,0 +1,39 @@
+from typing import Callable
+
+from utils import State
+
+
+class BaseProblem:
+    jitable = None
+
+    def setup(self, randkey, state: State = State()):
+        """initialize the state of the problem"""
+        pass
+
+    def evaluate(self, randkey, state: State, act_func: Callable, params):
+        """evaluate one individual"""
+        raise NotImplementedError
+
+    @property
+    def input_shape(self):
+        """
+        The input shape for the problem to evaluate
+        In RL problem, it is the observation space
+        In function fitting problem, it is the input shape of the function
+        """
+        raise NotImplementedError
+
+    @property
+    def output_shape(self):
+        """
+        The output shape for the problem to evaluate
+        In RL problem, it is the action space
+        In function fitting problem, it is the output shape of the function
+        """
+        raise NotImplementedError
+
+    def show(self, randkey, state: State, act_func: Callable, params, *args, **kwargs):
+        """
+        show how a genome perform in this problem
+        """
+        raise NotImplementedError