
class InvalidPDFError(ValueError):
    pass


class FieldParseError(Exception):
    pass


class InvalidPDFError(ValueError):
    pass


class UnknownVariantError(Exception):
    pass


class FieldParseError(Exception):
    pass

Add new exception type for unknown variants
Add new exception type for unknown variants

  
  class InvalidPDFError(ValueError):
+     pass
+ 
+ 
+ class UnknownVariantError(Exception):
      pass
  
  
  class FieldParseError(Exception):
      pass
  
Add new exception type for unknown variants
## Code Before:

class InvalidPDFError(ValueError):
    pass


class FieldParseError(Exception):
    pass

## Instruction:
Add new exception type for unknown variants
## Code After:

class InvalidPDFError(ValueError):
    pass


class UnknownVariantError(Exception):
    pass


class FieldParseError(Exception):
    pass
