Grokzen / redis-py-cluster / 270

86%

Pull #77

travis-ci

Refactor exception handling

 - Simplified some exception handling and logic in client.py
 - New exception classes. They are in exceptions.py
   They are used in the code and can in some cases be raised to user code.
 - Add sleep ty TryAgainError and change what exception class is raised when TTL is exhausted to make it easier to understand what error is raised.
 - Update Upgrade instructions.

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