_initappimage in site.py

python_appimage/data/site-patch.py

@@ -0,0 +1,16 @@
+# This is a site.py patch when calling Python from an AppImage.
+def _initappimage():
+    """Initialise executable name for running from an AppImage."""
+    env = os.environ
+    try:
+        command = env["APPIMAGE_COMMAND"]
+    except KeyError:
+        return
+
+    if command and ("APPDIR" in env):
+        command = os.path.abspath(command)
+        sys.executable = command
+        sys._base_executable = command
+
+_initappimage()
+del _initappimage