def sequence_to_sequence(s):
if not s:
return empty
type = type_of(IFieldType(s[0]))
try:
for i in s:
type(i)
except TypeError:
raise TypeError('Sequences must be of one type, could not '
'convert %r to %r' % (
i,
type
))
return s
def add(self, value, type=IFieldType):
value = type(value)
if value is empty:
return
name = self.name
data = self.content.data
current = data.get(name)
if name not in data:
current = data[name] = []
elif isinstance(current, basestring):
current = data[name] = [current]
elif not isinstance(current, list):
current = data[self.name] = list(current)
if isinstance(value, (tuple, list)):
if current and type_of(value) != type_of(current):
raise TypeError("Can't add %s to %s" % (type_of(value).__name__, type_of(current).__name__))
self.content.data[self.name].extend(value)
else:
if current and type_of(value) != type_of(current[0]):
raise TypeError("Can't add %s to %s" % (type_of(value).__name__, type_of(current).__name__))
self.content.data[self.name].append(value)
def type(self):
return type_of(self.content.data.get(self.name))
