The logging output in ply is segregated into four levels; error, warn, info, debug. By default ply prints only error and warn levels. You can change this for your project by:
$ ply set log.levels=X in ply
where X is the log levels desired. For instance, to change your log levels to all:
$ ply set log.levels=warn,info,debug in ply
Note, you cannot supress error logs, which is why the above example didn't explicitly need to set error.
To simply append to the existing log levels:
$ ply append info to log.levels in ply
Which, given the default log levels of error and warn, will add info.
Log levels can also be changed just for a single execution using the ad-hoc properties of ply. Ad-hoc properties are those specified on the command line with the -P directive. For instance to have error, warn and info information printed while running test:
$ ply test -Pply.log.levels=warn,info
Since we used the ad-hoc directive, the next execution will revert to the existing log levels of just error and warn.