class InvalidPidFileError(Exception):
    """ An exception when an invalid PID file is read."""

class PidFileExistsError(Exception):
    """ An exception when a PID file already exists."""

class InvalidPidFileError(Exception):
    """ An exception when an invalid PID file is read."""

class PidFileExistsError(Exception):
    """ An exception when a PID file already exists."""

class InvalidPidDirectoryError(Exception):
    """ An exception when an invalid PID directory is detected."""

Add a new exception since we are making a directory now.
Add a new exception since we are making a directory now.

  class InvalidPidFileError(Exception):
      """ An exception when an invalid PID file is read."""
  
  class PidFileExistsError(Exception):
      """ An exception when a PID file already exists."""
  
+ class InvalidPidDirectoryError(Exception):
+     """ An exception when an invalid PID directory is detected."""
+ 
Add a new exception since we are making a directory now.
## Code Before:
class InvalidPidFileError(Exception):
    """ An exception when an invalid PID file is read."""

class PidFileExistsError(Exception):
    """ An exception when a PID file already exists."""

## Instruction:
Add a new exception since we are making a directory now.
## Code After:
class InvalidPidFileError(Exception):
    """ An exception when an invalid PID file is read."""

class PidFileExistsError(Exception):
    """ An exception when a PID file already exists."""

class InvalidPidDirectoryError(Exception):
    """ An exception when an invalid PID directory is detected."""
