Use "verbose" to indicate whether print verbose messages for `get`, `push` and `search`

I noticed the functions: `get`, `push` and `search` use different parameter to indicate whether prints verbose messages, which is quite inconvenient.  And `text` or `prints` is not so easy to guess their meaning too.

So I suggest using the same parameter `verbose` instead, and use logging.warning messages if the old `text` or `prints` is used.