optimization.py

# import redis
# 
# 
# 
# 
# class Optimization(object):
# 
#     def __init__(self):
#         
#         db = redis.Redis('localhost')
#         
#     def save_distance(self, key, value):
#         """Save a key with some data into Redis.
#         """
#     
#         try:
#             # unicode objects must be encoded before hashing so we encode to
#             # utf-8
#             # TODO ?? Where does this encoding happen?
#             with (yield from self.redis_pool) as conn:
#                 yield from conn.set(key, info)
#         except (aioredis.ReplyError, aioredis.ProtocolError):
#             return False
#         return True
#     
#     
#     def get_key_info(self, key: str) -> str:
#         """Retrieve data about a key from Redis, or None if unavailable.
#         """
#     
#         try:
#             with (yield from self.redis_pool) as conn:
#                 info = yield from conn.get(key)
#         except (aioredis.ReplyError, aioredis.ProtocolError):
#             return None
#         if info is None:
#             return None
#         return info.decode("utf-8")
#     
#     
#     def destroy_key(self, key: str) -> bool:
#         try:
#             with (yield from self.redis_pool) as conn:
#                 yield from conn.delete(key)
#         except (aioredis.ReplyError, aioredis.ProtocolError):
#             return False
#         return True