a simple async commandline client to list items from etcd

etcd is a key-value store for the most critical data of distributed systems.

1. async_client.py reads all value corresponding to a key
2. read_prefixkeys_etcd.py writes some key value pairs to etcd and reads the keys with provided prefix

usage

$ etcdctl mk /prefix/foo test
$ python read_prefixkeys_etcd.py prefix/
/prefix/foo: test