removed redundant import in routes.py

responder/routes.py

@@ -1,5 +1,5 @@
 import re
-from parse import parse, search
+from parse import parse
 
 
 def memoize(f):
@@ -60,7 +60,8 @@ class Route:
         return url
 
     def _weight(self):
-        params_count = -len(set(self._param_pattern.findall(self.route)))
+        params = set(self._param_pattern.findall(self.route))
+        params_count = -len(params) or 0
         return params_count != 0, params_count
 
     @property

tests/test_routes.py

@@ -97,7 +97,7 @@ def test_does_match_with_route(route, match, expected):
         pytest.param(
             "/{greetings}_{name}", (True, -2), id="with 2 param and underscore"
         ),
-        pytest.param("/hello", (False, -0), id="with 2 param and underscore"),
+        pytest.param("/hello", (False, 0), id="with 2 param and underscore"),
     ],
 )
 def test_weight(path_param, expected_weight):