python / jinja2 bytecode cache for Redis

gistfile1.py

from jinja2 import BytecodeCache


class RedisTemplateBytecodeCache(BytecodeCache):
    '''Implements a Jinja2 bytecode cache on top of a pyredis.StrictRedis
    connection
    See: http://jinja.pocoo.org/docs/2.10/api/#bytecode-cache
    '''

    def __init__(self, redis_cnx, template_cache_key_prefix=None, ttl=86400):
        self.cnx = redis_cnx
        self.template_cache_key_prefix = template_cache_key_prefix
        self.ttl = ttl

    def key(self, k):
        if self.template_cache_key_prefix:
            return '{}_{}'.format(self.template_cache_key_prefix, k)
        return k

    def load_bytecode(self, bucket):
        bc = self.cnx.get(self.key(bucket.key))
        if bc:
            bucket.load_bytecode(bc)

    def dump_bytecode(self, bucket):
        self.cnx.setex(
            self.key(bucket.key),
            self.ttl,
            bucket.bytecode_to_string()
        )

    def clear(self):
        pass