define a __globals__ attribute in wrapper _PrintFunction
to close Debian bug #980707
Index: sympy/sympy/printing/printer.py
===================================================================
--- sympy.orig/sympy/printing/printer.py
+++ sympy/sympy/printing/printer.py
@@ -395,6 +395,14 @@ class _PrintFunction:
         assert params.pop(-1).kind == inspect.Parameter.VAR_KEYWORD
         self.__other_params = params
 
+        # define the __globals__ attribute to fix Debian bug #980707
+        # which touches the package octave-symbolic
+        #
+        if hasattr(f, "__globals__"):
+            self.__globals__ = f.__globals__
+        else:
+            self.__globals__ = []
+
         self.__print_cls = print_cls
         update_wrapper(self, f)