Use logging print the output of pprint

Question

I want to use pprint's output to show a complex data structure, but I would like to output it using the logging module rather than stdout.

ds = [{'hello': 'there'}]
logging.debug( pprint.pprint(ds) ) # outputs as STDOUT

Answer 1

Use pprint.pformat to get a string, and then send it to your logging framework.

from pprint import pformat
ds = [{'hello': 'there'}]
logging.debug(pformat(ds))

Answer 2

The solution above didn't quite cut it for me because I'm also using a formatter to add name and levelname when logging. It looks a little untidy:

__main__    : DEBUG   : ['aaaaaaaaaaaaaaaaaaaa',
'bbbbbbbbbbbbbbbbbbbb',
'cccccccccccccccccccc',
'dddddddddddddddddddd']
__main__    : DEBUG   : Some other logging text

There may be a more elegant solution, but this:

for line in pprint.pformat(ds).split('\n'):
    logging.debug(line)

produces something a little nicer:

__main__    : DEBUG   : ['aaaaaaaaaaaaaaaaaaaa',
__main__    : DEBUG   :  'bbbbbbbbbbbbbbbbbbbb',
__main__    : DEBUG   :  'cccccccccccccccccccc',
__main__    : DEBUG   :  'dddddddddddddddddddd']
__main__    : DEBUG   : Some other logging text