Parse float and create Explicable_float

pymath/calculus/explicable.py

@@ -61,6 +61,7 @@ class Explicable(Renderable):
                 return False
 
 class Explicable_int(int, Explicable):
+    """ An Explicable_int is an int which can be explain """
     isNumber = True
 
     def __init__(self, val):
@@ -78,6 +79,25 @@ class Explicable_int(int, Explicable):
     def __tex__(self):
         return str(self._val)
 
+class Explicable_float(float, Explicable):
+    """ An Explicable_float is an float which can be explain """
+    isNumber = True
+
+    def __init__(self, val):
+        super(Explicable_float, self).__init__(val)
+        self._val = val
+        self.postfix_tokens = [self]
+        self.steps = []
+
+    def simplify(self):
+        return Explicable_float(self._val)
+
+    def __txt__(self):
+        return str(self._val)
+
+    def __tex__(self):
+        return str(self._val)
+
 
 
 # -----------------------------