def len_error ( self, len ):
raise FacetError(
"The '%s' facet of %s instance must be %s, but you attempted to "
"change its length to %d element%s." %
( self.name, class_of( self.object() ),
self.facet.full_info( self.object(), self.name, Undefined ),
len, 's'[ len == 1: ] )
)
def set_args ( self ):
if self.desc is None:
extra = ''
else:
extra = ' specifies %s and' % self.desc
obj = getattr( self, 'object', None )
# Note: self.args must be a tuple so be sure to leave the trailing
# commas.
if obj is not None:
self.args = ( "%s '%s' facet of %s instance%s must be %s, "
"but a value of %s was specified." % (
self.prefix, self.name, class_of( obj ), extra,
self.info, self.value ) ),
else:
self.args = ( "%s '%s' facet%s must be %s, but a value of %s was "
"specified." % ( self.prefix, self.name, extra,
self.info, self.value ) ),
