Duckling by wit.ai/Facebook (https://github.com/facebookincubator/duckling) is one of the best libraries to find and parse time expressions.
This package contains a native python wrapper to use duckling directly from within python. It basically provides a wrapper for the Haskell FFI (Foreign Function Interface).
Note: This code is experimental. Contributions are welcome, but I cannot guarantee to integrate stuff quickly. But please feel free to use it as an inspiration for your own work.
The wrapper currently only supports the Time dimension, but should be easily extendable to other extensions (see DucklingFFI.hs). I only tested it within Docker containers. There the process is as follows:
in the project root build the image docker build -t pyduckling .
start a shell in the container docker run -it pyduckling bash
start python
run:
from datetime import datetime
from pyduckling import parse_time
now = int(1000 * datetime.timestamp(datetime.utcnow()))
parse_time('next week', 'EN', now)
parse_time('nächsten Montag', 'DE', now)