- if self['mutable-type'] and self['mutable-type'] not in ("sdmf", "mdmf"):
- raise usage.UsageError("%s is an invalid format" % self['mutable-type'])
+ if self['mutable-type']:
+ if self['mutable-type'].lower() not in ("sdmf", "mdmf"):
+ raise usage.UsageError("%s is an invalid format" % self['mutable-type'])
+ self['mutable-type'] = self['mutable-type'].lower()