- if is_a_dsc:
- if format != (1,0) and \
- format != (3,0,"quilt") and format != (3,0,"native"):
- raise UnknownFormatError, repr(format)
- else:
- if (format < (1,5) or format > (1,8)):
- raise UnknownFormatError, repr(format)
- if field != "files" and format < (1,8):
- raise UnknownFormatError, repr(format)
+ """
+ Raises UnknownFormatError if the specified format tuple is not valid for
+ this format (for example, the format (1, 0) is not valid for the
+ "3.0 (quilt)" format). Return value is undefined in all other cases.
+ """
+ pass