Changed occurrences of sys.argv in main to args.

rivalcfg/__main__.py

@@ -58,7 +58,7 @@ def _render_battery_level(level=None, is_charging=None):
 
 def main(args=sys.argv[1:]):
     # Display a message when no argument given
-    if len(sys.argv) == 1:
+    if not args:
         print("USAGE:\n  rivalcfg --help")
         sys.exit(1)
 
@@ -68,19 +68,19 @@ def main(args=sys.argv[1:]):
     # Try to open a mouse
     mouse = None
     if (
-        "--print-debug" not in sys.argv
-        and "--list" not in sys.argv
-        and "--version" not in sys.argv
-        and "--update-udev" not in sys.argv
-        and "--print-udev" not in sys.argv
+        "--print-debug" not in args
+        and "--list" not in args
+        and "--version" not in args
+        and "--update-udev" not in args
+        and "--print-udev" not in args
     ):
         try:
             mouse = get_first_mouse()
-            if "--help" not in sys.argv and "-h" not in sys.argv and not mouse:
+            if "--help" not in args and "-h" not in args and not mouse:
                 print("E: No supported device found.")
                 sys.exit(1)
         except IOError as error:
-            if "--help" not in sys.argv and "-h" not in sys.argv:
+            if "--help" not in args and "-h" not in args:
                 raise error
 
     cli_parser = argparse.ArgumentParser(prog="rivalcfg", epilog=_EPILOG)