I’ve spent a few evenings and spare hours this week dusting off and updating osmdiff. If you’re a python developer and you need to interact with replication diffs or augmented diffs, this may just be something of interest to you. osmdiff can retrieve replication diffs as well as augmented diffs from OSM servers, and parse them into native Python Node, Way and Relation objects you can use in your code. This lets you do things like

>>> from osmdiff import OSMChange
>>> o = OSMChange()
>>> o.frequency = "minute"  # the default
>>> o.get_state()  # retrieve current sequence ID
>>> o.sequence_number
2704451
>>> o.retrieve()  # retrieve from API
>>> o
OSMChange (677 created, 204 modified, 14 deleted)

Once you have the data, you can filter and inspect it:

>>> w = [n["new"] for n in a.modify if n["new"].attribs["id"] == "452218081"]
>>> w
[Way 452218081 (10 nodes)]
>>> w[0]
Way 452218081 (10 nodes)
>>> w[0].tags
{'highway': 'residential'}
>>> w[0].attribs
{'id': '452218081', 'version': '2', 'timestamp': '2017-11-10T13:52:01Z', 'changeset': '53667190', 'uid': '2352517', 'user': 'carths81'}
>>> w[0].attribs
{'id': '452218081', 'version': '2', 'timestamp': '2017-11-10T13:52:01Z', 'changeset': '53667190', 'uid': '2352517', 'user': 'carths81'}
>>> w[0].bounds
['12.8932677', '43.3575917', '12.8948117', '43.3585947']

You can also use osmdiffs implementation of Node, Way and Relation objects separately if you need just those, the library is quite small and has few dependencies (just requests and dateutil)

On the list of things in development and slated for the next release are: * Python __geo_interface__ support so you can easily use them in other Python modules that support them like shapely and geojson * Retrieving individual OSM features from the OSM API * Ability to create an AugmentedDiff / OSMChange object with a datetime parameter, which will then calculate the sequence number for you * More tests, always more tests, and CircleCI integration

If you are using osmdiff and find it useful, I would love to hear from you. If you find a bug or find something lacking, please [open an issue].