added agents

src/rl4greencrab/agents/const_action.py

@@ -0,0 +1,11 @@
+class constAction:
+    def __init__(self, mortality=0, env = None, **kwargs):
+        self.mortality = mortality
+        self.action = 2 * self.mortality - 1
+        self.env = env
+
+    def predict(self, observation):
+        return self.action
+
+
+

src/rl4greencrab/agents/const_escapement.py

@@ -0,0 +1,23 @@
+class constEsc:
+    def __init__(self, escapement, env = None):
+        self.escapement = escapement
+        self.env = env
+        self.bound = 1
+        if self.env is not None:
+            self.bound = self.env.bound
+
+    def predict(self, observation):
+        obs_nat_units = self.bound * self.to_01(observation)
+        if obs_nat_units <= self.escapement or obs_nat_units =< 0:
+            return -1
+        mortality = (obs_nat_units - self.escapement) / self.escapement
+        return self.to_pm1(mortality)   
+
+    def to_01(self, val):
+        return (val + 1 ) / 2
+
+    def to_pm1(self, val):
+        return 2 * val - 1
+
+
+