<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def ingest_resources(mapping, schema_dir):
 """Consume the Swagger schemas and produce a queryable datastructure. :param mapping: Map from resource name to filepath of its api declaration :type mapping: dict :param schema_dir: the directory schema files live inside :type schema_dir: string :returns: A list of mapping from :class:`RequestMatcher` to :class:`ValidatorMap` """

    ingested_resources = []
    for name, filepath in iteritems(mapping):
        try:
            ingested_resources.append(load_schema(filepath))
        # If we have trouble reading any files, raise a more user-friendly
        # error.
        except IOError:
            raise ApiDeclarationNotFoundError(
                'No api declaration found at {0}. Attempted to load the `{1}` '
                'resource relative to the schema_directory `{2}`. Perhaps '
                'your resource name and API declaration file do not '
                'match?'.format(filepath, name, schema_dir)
            )
    return ingested_resources