14 def nameprep(label):  argument
17     for c in label:
22     label = "".join(newlabel)
25     label = unicodedata.normalize("NFKC", label)
28     for c in label:
41     RandAL = [stringprep.in_table_d1(x) for x in label]
50             if any(stringprep.in_table_d2(x) for x in label):
60     return label
62 def ToASCII(label):  argument
65         label = label.encode("ascii")
71         if 0 < len(label) < 64:
72             return label
76     label = nameprep(label)
81         label = label.encode("ascii")
86         if 0 < len(label) < 64:
87             return label
91     if label.startswith(sace_prefix):
95     label = label.encode("punycode")
98     label = ace_prefix + label
101     if 0 < len(label) < 64:
102         return label
105 def ToUnicode(label):  argument
107     if isinstance(label, bytes):
111             label = label.encode("ascii")
117         label = nameprep(label)
120             label = label.encode("ascii")
124     if not label.startswith(ace_prefix):
125         return str(label, "ascii")
128     label1 = label[len(ace_prefix):]
138     if str(label, "ascii").lower() != str(label2, "ascii"):
139         raise UnicodeError("IDNA does not round-trip", label, label2)
163             for label in labels[:-1]:
164                 if not (0 < len(label) < 64):
177         for label in labels:
181             result.extend(ToASCII(label))
213         for label in labels:
214             result.append(ToUnicode(label))
241         for label in labels:
246             result.extend(ToASCII(label))
247             size += len(label)
282         for label in labels:
283             result.append(ToUnicode(label))
286             size += len(label)