Problem with resolving JSON Schema references

[moskal91]

There is problem with resolving JSON Schema references, because local file URIs should have triple slashes, third slash is for machine address and means localhost.

Changing line:

resolver = jsonschema.RefResolver('file://{}'.format(self.schema_location), schema)

to

resolver = jsonschema.RefResolver('file:///{}'.format(self.schema_location), schema)

resolves the problem.