Test: separate expression build and showing it

possible

mapytex/calculus/API/tokens/token.py

@@ -44,7 +44,7 @@ class Token(object):
 
     def explain(self):
         """ Yield every calculus step which have lead to self
-
+        
         :example:
         >>> from mapytex.calculus.API import Expression
         >>> e = Expression.from_str("2+3*4")
@@ -64,10 +64,25 @@ class Token(object):
             yield self
 
     def __repr__(self):
-        return f"<{self.__class__.__name__} {renders['txt'](self._mo)}>"
+        return f"<{self.__class__.__name__} {self.__txt__}>"
 
     def __str__(self):
-        return renders[self.RENDER](self._mo)
+        if self.RENDER == "tex":
+            return self.__tex__
+        elif self.RENDER == "txt":
+            return self.__txt__
+        else:
+            raise ValueError(f"Unknow render {self.RENDER}")
+
+        # return renders[self.RENDER](self._mo)
+
+    @property
+    def __txt__(self):
+        return self._mo.__txt__
+
+    @property
+    def __tex__(self):
+        return self._mo.__tex__
 
     @property
     def raw(self):
@@ -250,6 +265,7 @@ class Token(object):
     """
         return self._operate(other, "^")
 
+
     def _roperate(self, other, operation):
         """ Make a operation between 2 Tokens """
         from ..expression import Expression
@@ -299,7 +315,6 @@ class Token(object):
         <Linear x - 3>
         """
         return self._roperate(other, "-")
-
     def __rmul__(self, other):
         """ Multiply 2 Tokens or a Token and a Expression
 
@@ -327,6 +342,7 @@ class Token(object):
         """
         return self._roperate(other, "/")
 
+
     def _get_soul(self, other=None):
         """ Get the builtin soul of self or other """
         if isinstance(other, Token):