[FIX] matplotlib error in headless mode

uulm-mrm · Jan 2, 2024 · 590103a · 590103a
1 parent 2e0a4b2
commit 590103a
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Showing 2 changed files with 7 additions and 2 deletions.
diff --git a/excalibur/__init__.py b/excalibur/__init__.py
@@ -1,4 +1,8 @@
-import matplotlib
-matplotlib.use('tkagg')  # prevent issues of cv2 in combination with Qt platform plugin "xcb"
+try:
+    import matplotlib
+    matplotlib.use('tkagg')  # prevent issues with cv2 in combination with the Qt platform plugin "xcb"
+except ImportError:
+    import warnings
+    warnings.warn("Could not set matplotlib backend to 'tkagg'. This might cause issues with cv2 in combination with the Qt platform plugin 'xcb'.")
 
 __version__ = '0.2.0'
diff --git a/requirements.txt b/requirements.txt
@@ -1,6 +1,7 @@
 checkerboard==0.2.4
 cvxopt==1.3.1
 cvxpy==1.3.1
+matplotlib==3.7.4
 motion3d>=0.1
 networkx==3.1
 numpy>=1.24