pee eye dee of pie thon.

Use ps, grep, cut.

COMMAND_TO_LIST_ALL_PIDS | FILTER_OUT_JUST_*YTHON | CUT_OUT_JUST_THE_PIDS | GREP_FOR_EVENS/ODDS | SEND_A_SIGNAL_WITH_KILL_AND_XARGS

GREP_FOR_FILES_CONTAINING_PATTERN | FILTER_IF_NEEDED | USE xargs HERE

List all processes belong to a $USERNAME with ps -u $USERNAME. You can get the pids from this list and send a signal to those pids.