Fix the bug of processing arguments[validator] in parse_args

Author: willson-chen

jsonschema/cli.py

@@ -191,8 +191,6 @@ def _namedAnyWithDefault(name):
 
 def parse_args(args):
     arguments = vars(parser.parse_args(args=args or ["--help"]))
-    if arguments["validator"] is None:
-        arguments["validator"] = validator_for(arguments["schema"])
     if arguments["output"] != "plain" and arguments["error_format"]:
         raise parser.error(
             "--error-format can only be used with --output plain"
@@ -229,6 +227,9 @@ def run(arguments, stdout=sys.stdout, stderr=sys.stderr, stdin=sys.stdin):
     except _CannotLoadFile:
         return 1
 
+    if arguments["validator"] is None:
+        arguments["validator"] = validator_for(schema)
+
     try:
         arguments["validator"].check_schema(schema)
     except SchemaError as error: