FlexGet plugin which adds custom jinja filters

my_filters.py

"""
This plugin just registers more functions as jinja filters. You can then use the filters from any
jinja template in FlexGet like normal. e.g. {{afield|myfilter}}
"""

import logging

log = logging.getLogger('my_filters')

def filter_myfilter(val):
    return 'blah'

@event('manager.startup', priority=120)
def add_filters(manager):
    from flexget.utils.template import environment
    for name, filt in globals().items():
        if name.startswith('filter_'):
            filtername = name.split('_', 1)[1]
            log.debug('adding custom jinja filter %s' % filtername)
            environment.filters[filtername] = filt