Remove less common alphabets.

Author: serhiy-storchaka

Doc/library/binascii.rst

@@ -291,27 +291,15 @@ The :mod:`!binascii` module defines the following functions:
 
    .. versionadded:: next
 
-.. data:: CRYPT_ALPHABET
-
-   The Base 64 alphabet used in the :manpage:`crypt(3)` routine and in the GEDCOM format.
-
-   .. versionadded:: next
-
-.. data:: BCRYPT_ALPHABET
-
-   The Base 64 alphabet used in the ``bcrypt`` hashing function.
-
-   .. versionadded:: next
-
 .. data:: UU_ALPHABET
 
    The uuencoding alphabet.
 
    .. versionadded:: next
 
-.. data:: XX_ALPHABET
+.. data:: CRYPT_ALPHABET
 
-   The xxencoding alphabet.
+   The Base 64 alphabet used in the :manpage:`crypt(3)` routine and in the GEDCOM format.
 
    .. versionadded:: next
 

Lib/test/test_binascii.py

@@ -53,20 +53,11 @@ def test_constants(self):
                          b'0123456789+/')
         self.assertEqual(binascii.URLSAFE_BASE64_ALPHABET,
                          binascii.BASE64_ALPHABET[:-2] + b'-_')
+        self.assertEqual(binascii.UU_ALPHABET, bytes(range(32, 32+64)))
         self.assertEqual(binascii.CRYPT_ALPHABET,
                          b'./0123456789'
                          b'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
                          b'abcdefghijklmnopqrstuvwxyz')
-        self.assertEqual(binascii.BCRYPT_ALPHABET,
-                         b'./'
-                         b'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
-                         b'abcdefghijklmnopqrstuvwxyz'
-                         b'0123456789')
-        self.assertEqual(binascii.UU_ALPHABET, bytes(range(32, 32+64)))
-        self.assertEqual(binascii.XX_ALPHABET,
-                         b'+-0123456789'
-                         b'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
-                         b'abcdefghijklmnopqrstuvwxyz')
         self.assertEqual(binascii.BINHEX_ALPHABET,
                          b'!"#$%&\'()*+,-012345689'
                          b'@ABCDEFGHIJKLMNPQRSTUVXYZ['

Modules/binascii.c

@@ -2082,14 +2082,6 @@ binascii_exec(PyObject *module)
     {
         return -1;
     }
-    if (PyModule_Add(module, "BCRYPT_ALPHABET",
-        PyBytes_FromString("./"
-                           "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
-                           "abcdefghijklmnopqrstuvwxyz"
-                           "0123456789")) < 0)
-    {
-        return -1;
-    }
     if (PyModule_Add(module, "UU_ALPHABET",
         PyBytes_FromString(" !\"#$%&'()*+,-./"
                            "0123456789:;<=>?@"
@@ -2098,13 +2090,6 @@ binascii_exec(PyObject *module)
     {
         return -1;
     }
-    if (PyModule_Add(module, "XX_ALPHABET",
-        PyBytes_FromString("+-0123456789"
-                           "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
-                           "abcdefghijklmnopqrstuvwxyz")) < 0)
-    {
-        return -1;
-    }
     if (PyModule_Add(module, "BINHEX_ALPHABET",
         PyBytes_FromString("!\"#$%&'()*+,-012345689@"
                            "ABCDEFGHIJKLMNPQRSTUVXYZ[`"