From 81c1d46db03c9e3d94a91d0a0244f1fac1304d71 Mon Sep 17 00:00:00 2001
From: "mhochsteger@cerbsim.com" <mhochsteger@cerbsim.com>
Date: Tue, 9 Nov 2021 09:15:55 +0100
Subject: [PATCH] fix python import of non-gui builds

---
 python/__init__.py | 26 ++++++++++++++------------
 1 file changed, 14 insertions(+), 12 deletions(-)

diff --git a/python/__init__.py b/python/__init__.py
index 424fc6e7..ac8f7ba6 100644
--- a/python/__init__.py
+++ b/python/__init__.py
@@ -16,17 +16,19 @@ del os
 
 from . import libngpy
 
-_Redraw = libngpy.meshvis._Redraw
+if config.USE_GUI:
+    global _Redraw, Redraw
+    _Redraw = libngpy.meshvis._Redraw
 
-def RedrawWithEventHandling(*args, **kwargs):
-    try:
-        if libngpy.meshvis._Redraw(*args, **kwargs):
-            import netgen
-            import tkinter
-            cnt = 0
-            while(netgen.gui.win.tk.dooneevent(tkinter._tkinter.DONT_WAIT) and cnt < 100):
-                cnt += 1
-    except:
-        pass
+    def RedrawWithEventHandling(*args, **kwargs):
+        try:
+            if libngpy.meshvis._Redraw(*args, **kwargs):
+                import netgen
+                import tkinter
+                cnt = 0
+                while(netgen.gui.win.tk.dooneevent(tkinter._tkinter.DONT_WAIT) and cnt < 100):
+                    cnt += 1
+        except:
+            pass
 
-Redraw = RedrawWithEventHandling
+    Redraw = RedrawWithEventHandling