fixxxxx

mathics/builtin/graphics.py

@@ -682,7 +682,6 @@ def to_rgba(self):
         return self.to_color_space("RGB")
 
     def to_color_space(self, color_space):
-        print("colorspace=", self.color_space, "components:", self.components)
         components = convert_color(self.components, self.color_space, color_space)
         if components is None:
             raise ValueError(
@@ -3817,10 +3816,10 @@ def boxes_to_mathml(self, leaves=None, **options):
             leaves = self._leaves
         try:
             elements, calc_dimensions = self._prepare_elements(leaves, options, neg_y=True)
-            print("calc_dimensions:", calc_dimensions)
         except:
             if self.evaluation:
                 self.evaluation.message("General", "notboxes", Expression("GraphicsBox", self._leaves))
+            return
 
         xmin, xmax, ymin, ymax, w, h, width, height = calc_dimensions()
         data = (elements, xmin, xmax, ymin, ymax, w, h, width, height)

mathics/builtin/inout.py

@@ -37,7 +37,8 @@
     PrecisionReal,
     SymbolList,
     SymbolMakeBoxes,
-    SymbolRule
+    SymbolNull,
+    SymbolRule,
 )
 from mathics.core.numbers import (
     dps,
@@ -2101,7 +2102,10 @@ def apply_mathml(self, expr, evaluation) -> Expression:
                 "notboxes",
                 Expression("FullForm", boxes).evaluate(evaluation),
             )
-            xml = ""
+            xml = None
+        if xml is None:
+            return Expression("RowBox", Expression(SymbolList, String("")))
+
         is_a_picture = xml[:6] == "<mtext"
 
         # mathml = '<math><mstyle displaystyle="true">%s</mstyle></math>' % xml
@@ -2206,6 +2210,8 @@ def apply_tex(self, expr, evaluation) -> Expression:
         boxes = MakeBoxes(expr).evaluate(evaluation)
         try:
             tex = boxes.boxes_to_tex(evaluation=evaluation)
+            if tex is None:
+                return Expression("RowBox", Expression(SymbolList, String("")))
 
             # Replace multiple newlines by a single one e.g. between asy-blocks
             tex = MULTI_NEWLINE_RE.sub("\n", tex)