Traceback (most recent call last):


 "testcerberus.py", line 36, in <module>

cerberus.Validator(schema)


 "/home/moutix/.virtualenvs/BackEnd/lib/python3.6/site-packages/cerberus/validator.py", line 181, in __init__

self.schema = kwargs.get('schema', None)


 "/home/moutix/.virtualenvs/BackEnd/lib/python3.6/site-packages/cerberus/validator.py", line 562, in schema

self._schema = DefinitionSchema(self, schema)


 "/home/moutix/.virtualenvs/BackEnd/lib/python3.6/site-packages/cerberus/schema.py", line 76, in __init__

self.validate(schema)


 "/home/moutix/.virtualenvs/BackEnd/lib/python3.6/site-packages/cerberus/schema.py", line 247, in validate

self._validate(schema)


 "/home/moutix/.virtualenvs/BackEnd/lib/python3.6/site-packages/cerberus/schema.py", line 263, in _validate

raise SchemaError(self.schema_validator.errors)
cerberus.schema.SchemaError: {'a': [{'valuesrules': [{'keyschema': ['unknown rule'], 'valueschema': ['unknown rule']}]}]}

 Traceback (most recent call last):


 "kivy/graphics/transformation.pyx", line 301, in kivy.graphics.transformation.Matrix.view_clip
 ValueError: invalid frustrum
