Fix: Rendering and changing it works

mapytex/calculus/API/tokens/token.py

@@ -10,7 +10,7 @@
 Tokens: practical envelop of math object
 
 """
-from ..renders import renders
+from ..renders import render
 from ...core.MO.atoms import moify
 
 
@@ -18,8 +18,6 @@ class Token(object):
 
     """ Token: practical envelop of an math object """
 
-    RENDER = "txt"
-
     def __init__(self, mo, name="", ancestor=None):
         self._mo = mo
         self.name = name
@@ -34,14 +32,6 @@ class Token(object):
     ):
         raise NotImplemented
 
-    @classmethod
-    def set_render(cls, render):
-        """ Define default render function
-
-        :param render: render name (txt or tex)
-        """
-        cls.RENDER = render
-
     def explain(self):
         """ Yield every calculus step which have lead to self
 
@@ -64,10 +54,10 @@ class Token(object):
             yield self
 
     def __repr__(self):
-        return f"<{self.__class__.__name__} {renders['txt'](self._mo)}>"
+        return f"<{self.__class__.__name__} {render(self._mo, 'txt')}>"
 
     def __str__(self):
-        return renders[self.RENDER](self._mo)
+        return render(self._mo)
 
     @property
     def raw(self):