Pyperclip might fail on some systems

get_coordinates_by_zipcode.py

@@ -103,7 +103,8 @@ def get_coordinates_by_zipcode(plz_patterns: list[str], precision: float = PRECI
         import pyperclip
         pyperclip.copy(wkt_polygon)
         print("WKT Polygon copied to clipboard.")
-    except ModuleNotFoundError:
+    except (ModuleNotFoundError, RuntimeError):
+        # Pyperclip is either not installed, or lacks a dependency
         pass
 
     print()