use singer taps and targets programatically

Hi, I’m participating in development of dataflows which has similar goals to your projects, and we would like to be able to integrate between the libraries - use singer taps / targets inside a data flow, and use a data flow as a singer tap / target (https://github.com/datahq/dataflows/issues/16)

To enable this integration we need to be able to call singer taps / targets from Python code, this is easy to do using subprocess.Popen, see example here

I think it would really useful to have this in a more standard way as part of the singer-python library.

Example: singer.read_tap

Install the tap: pip install tap-exchangeratesapi

Read from the tap:

>>> tap = singer.read_tap('exchangeratesapi', {"base": "ILS", "start_date": "2018-10-01"})
>>> for message in tap:
>>>     print(message)  # SchemaMessage / RecordMessage / StateMessage

[timvisher]

I’m going to close this for now but please feel free to reopen it if you’re interested in exploring it via a PR.

[timvisher]

I’ll close this out for now since we don’t have much forward momentum on the PR for now.