
class ReplaceConfigException(Exception):
    pass

class MergeConfigException(Exception):
    pass

class SessionLockedException(Exception):
    pass

class CommandTimeoutException(Exception):
    pass

class CommandErrorException(Exception):
    pass


class ConnectionException(Exception):
    pass

class ReplaceConfigException(Exception):
    pass

class MergeConfigException(Exception):
    pass

class SessionLockedException(Exception):
    pass

class CommandTimeoutException(Exception):
    pass

class CommandErrorException(Exception):
    pass

Raise ConnectionException when device unusable
Raise ConnectionException when device unusable

+ 
+ class ConnectionException(Exception):
+     pass
  
  class ReplaceConfigException(Exception):
      pass
  
  class MergeConfigException(Exception):
      pass
  
  class SessionLockedException(Exception):
      pass
  
  class CommandTimeoutException(Exception):
      pass
  
  class CommandErrorException(Exception):
      pass
  
Raise ConnectionException when device unusable
## Code Before:

class ReplaceConfigException(Exception):
    pass

class MergeConfigException(Exception):
    pass

class SessionLockedException(Exception):
    pass

class CommandTimeoutException(Exception):
    pass

class CommandErrorException(Exception):
    pass

## Instruction:
Raise ConnectionException when device unusable
## Code After:

class ConnectionException(Exception):
    pass

class ReplaceConfigException(Exception):
    pass

class MergeConfigException(Exception):
    pass

class SessionLockedException(Exception):
    pass

class CommandTimeoutException(Exception):
    pass

class CommandErrorException(Exception):
    pass
