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stringprep Module¶
The stringprep module provides support for internationalized domain names through Unicode normalization and validation per RFC 3454.
Complexity Reference¶
| Operation | Time | Space | Notes |
|---|---|---|---|
| Character mapping | O(1) | O(1) | Hash lookup |
String Preparation¶
Character Table Lookups¶
import stringprep
# stringprep provides character table lookup functions
# Used internally by encodings.idna for domain names
# Check if character codepoint is in table - O(1)
code = ord('A')
is_mapped = stringprep.in_table_b1(code) # O(1) - table lookup
# Check character categories - O(1) each
stringprep.in_table_c3(code) # Private use characters
stringprep.in_table_d1(code) # Bidi category check
Low-level Module
stringprep is primarily used by higher-level modules like encodings.idna.
For domain name preparation, use encodings.idna.nameprep() instead.