contrib: import 'requests' in try-except

run_electrum

@@ -50,7 +50,7 @@ def check_imports():
         import jsonrpclib
         import aiorpcx
     except ImportError as e:
-        sys.exit("Error: %s. Try 'sudo pip install <module-name>'"%str(e))
+        sys.exit(f"Error: {str(e)}. Try 'sudo python3 -m pip install <module-name>'")
     # the following imports are for pyinstaller
     from google.protobuf import descriptor
     from google.protobuf import message