Refect(Core): Improve error catch in apply and apply_on_last_level

mapytex/calculus/API/__init__.py

@@ -100,26 +100,9 @@ x^7
 from .expression import Expression
 
 if __name__ == "__main__":
-    e = Expression.from_str("2x^2+2x+3x")
-    print(e._tree.map_on_leaf(lambda x:(x,)))
-    for _ in range(5):
-        print("-"*10)
-        e = e._optimize()
-        try:
-            print(e._tree.map_on_leaf(lambda x:(x,)))
-        except AttributeError:
-            print(e)
-        e = e._typing()
-        try:
-            print(e._tree.map_on_leaf(lambda x:(x,)))
-        except AttributeError:
-            print(e)
-        e = e._compute()
-        try:
-            print(e._tree.map_on_leaf(lambda x:(x,)))
-        except AttributeError:
-            print(e)
-
+    e = Expression.from_str("2+3/4")
+    e_simplified = e.simplify()
+    print(e_simplified)
 
 # -----------------------------
 # Reglages pour 'vim'

mapytex/calculus/API/expression.py

@@ -163,11 +163,9 @@ class Expression(object):
          > <class 'mapytex.calculus.core.MO.fraction.MOFraction'>
         """
         try:
-            t = self._tree.apply_on_last_level(typing)
-        except (TypingError, NotImplementedError, AttributeError):
+            return Expression(self._tree.apply(typing))
+        except AttributeError:
             return self
-        else:
-            return Expression(t)._typing()
 
     def _compute(self):
         """" Compute one step of self