<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _inflate(cls, data):
 """Update config by deserialising input dictionary"""

        for k, v in data[Constants.CONFIG_KEY].items():
            setattr(cls, k, v)
        return cls._deflate()