Prometheus-client

[FEATURE] Add UntypedMetricFamily
[FEATURE] Allow start_http_server to take a registry, for use in multiprocesses setups
[ENCHANCEMENT] Don't log requests to WSGI server
[ENCHANCEMENT] Improved error handling when prometheus_multiproc_dir isn't set
[BUGFIX] Handle /proc/self/fd not being accessible
[BUGFIX] Workaround urlparse bug in Python 2.6

[BUGFIX] In multi-proc mode correctly handle metrics being created in both parent and child processes
[BUGFIX] Handle iterators being passed as labelnames to *MetricFamily
[ENHANCEMENT] Python 3.6 now officially supported

[FEATURE] Support all modes of mutli-process operation in mutliproc mode, and it's a little faster too
[FEATURE] Add platform collector by default to add information about the Python/JVM runtime
[ENHANCEMENT] Httpserver now multi-threaded
[BUGFIX] Use namespace/subsystem correctly in multiproc mode
[BUGFIX] Support labelnames being an empty list

[FEATURE] Support basic auth and allow for custom handlers for talking to the pushgateway
[BUGFIX] Support trailing commas in parser

[FEATURE] Add optional describe() method on collectors, fallback to "collect() if not present and explcitly requested on the registry. This is enabled on the default registry
[FEATURE] Use describe() method to raise an exception on duplicate time series names in a registry
[FEATURE] Add support for ?name[]=xxx to limit what metrics names are returned over http from a registry
[BUGFIX] An exception in a collector now causes a 500 rather than a blank 200
[BUGFIX] Disallow colon in label names
[BUGFIX] Correctly parse untyped metrics into one metric, not several

[BUGFIX] Gauge.set_to_current_time to return correct value on Python3