Create a readonly view of a dictionary as ObjectDicts

Verify if code is valid EAN13 barcode. Returns True|False

Returns the checksum digit of an EAN8 code

Extracts the partial (labelercode-productcode) NDCs for the original packager. Only populated if this SPL is for a repackager.

This is the standard filter for Device Annnotation. It may be appropriate to override this when the data does not have a `product_cod

Elasticsearch does not natively support the array type (expressed as items in JSON Schema), so we need an index with the `items` keys missing

Helper function that gets a value form deep within an object by passing a '.' delimited string of keys, for instance, `a.b.c` is pointing

Helper function to pull the set_id from the first entry in the index.

Generates a "stamp" (or a hash) for the ES index that could be used to determine whether or not any updates have been made to the index since the l

Group identical keys together. Given a sorted iterator of (key, value) pairs, returns an iterator of (key1, values), (key2, values).

A function for placing the `openfda` section in the appropriate place. The default is just to put it at the top level. If there are more

:param path: path to an existing directory :return: timestamp of the oldest file found in the given directory as YYYY-MM-DD

A helper function for extracting a specific subset of keys from a dictionary.