def list_accepted_extensions():
"""Return the extensions allowed for upload for printing.
:returns: Comma separated extensions
:rtype: unicode
"""
e = accepted_extensions()
if len(e) > 1:
e[-1] = 'and ' + e[-1]
return ', '.join(e)
def _to_python(self, value, state):
if value == '':
return value
embed = parse_embed_url(value)
if embed:
return value
ext = os.path.splitext(value)[1].lower()[1:]
container = guess_container_format(ext)
if container in accepted_extensions():
return value
raise formencode.Invalid(
"This isn't a valid YouTube, Google Video, Vimeo or direct link.",
value, state
)
