No more prints

[PeterSurda]

There are still occasions where print has remained and should be replaced by the logger.*. Some can remain, e.g. the notification about daemonizing or missing dependencies. This issue will be updated as I find more locations.

• src/api.py

[coffeedogs]

@PeterSurda can we be clear about scope and expected results please? Some thoughts that come to mind:

• Increase scope to use the opportunity of going through the code thoroughly with a mind on logging
• Test various logging configurations (which?), remove config cruft, document what to expect out of logging, maybe testing further logging config examples (rsyslog, elasticsearch?)
• Ensure log levels are appropriate and sent to stdout/stderr as appropriate
• Consider consolidating the number of log levels in use
• Consider any refactoring or standardisation of logging code (e.g. avoid code repetition, circular imports)
• Consider whether a log entry is actually required; maybe the point of a log entry is to watch out for a condition that better testing could have guarded against
• Ensure consistent log message style (tenses, first/third sing/pl person etc.)
• Change print statements to use the logger
• Implement tests around logging (critical examples?)

Quick check of the scale of this task:
12 logger.exception() calls
12 logger.fatal() calls
13 logger.critical() calls
20 logger.warning() calls
167 logger.info() calls
185 logger.debug() calls
467 (approx) print statements

[navjotcis]

I have removed the print statement of the api.py module.
#1673