Add RpnSymbol and RpnExpr __eq__ methods

gte/rpnlib.py

@@ -80,6 +80,14 @@ class RpnExpr(list):
                         for sym in self])
         return ' '.join([str(sym) for sym in self])
 
+    def __eq__(self, b):
+        if len(self) != len(b):
+            return False
+        for i in range(len(self)):
+            if self[i] != b[i]:
+                return False
+        return True
+
     @classmethod
     def random(cls, sz):
         return cls([RpnSymbol.random() for _ in range(sz)])
@@ -158,6 +166,11 @@ class RpnSymbol(object):
                         self.__class__.__name__)
         return '<%s %s(%s)>' % (name, optype, self.value)
 
+    def __eq__(self, b):
+        if not isinstance(b, RpnSymbol):
+            return False
+        return b.optype == self.optype and b.value == self.value
+
     @classmethod
     def from_string(cls, val):
         try: