Avoid WPS if no reaver+bully. Use bully if reaver isn't available.

wifite/tools/dependency.py

@@ -14,6 +14,12 @@ class Dependency(object):
                 )
 
 
+    @classmethod
+    def exists(cls):
+        from ..util.process import Process
+        return Process.exists(cls.dependency_name)
+
+
     @classmethod
     def run_dependency_check(cls):
         from ..util.color import Color