Used bytes.hex() and bytes.fromhex() to simplify.

django/contrib/gis/gdal/geometries.py

@@ -39,7 +39,7 @@
   True True
 """
 import sys
-from binascii import a2b_hex, b2a_hex
+from binascii import b2a_hex
 from ctypes import byref, c_char_p, c_double, c_ubyte, c_void_p, string_at
 
 from django.contrib.gis.gdal.base import GDALBase
@@ -67,7 +67,7 @@ class OGRGeometry(GDALBase):
 
         # If HEX, unpack input to a binary buffer.
         if str_instance and hex_regex.match(geom_input):
-            geom_input = memoryview(a2b_hex(geom_input.upper().encode()))
+            geom_input = memoryview(bytes.fromhex(geom_input))
             str_instance = False
 
         # Constructing the geometry,

django/db/backends/oracle/schema.py

-import binascii
 import copy
 import datetime
 import re
 
 from django.db.backends.base.schema import BaseDatabaseSchemaEditor
 from django.db.utils import DatabaseError
-from django.utils.encoding import force_text
 
 
 class DatabaseSchemaEditor(BaseDatabaseSchemaEditor):
@@ -25,7 +23,7 @@ class DatabaseSchemaEditor(BaseDatabaseSchemaEditor):
         elif isinstance(value, str):
             return "'%s'" % value.replace("\'", "\'\'")
         elif isinstance(value, (bytes, bytearray, memoryview)):
-            return "'%s'" % force_text(binascii.hexlify(value))
+            return "'%s'" % value.hex()
         elif isinstance(value, bool):
             return "1" if value else "0"
         else:

django/db/backends/sqlite3/schema.py

-import codecs
 import contextlib
 import copy
 from decimal import Decimal
@@ -49,13 +48,8 @@ class DatabaseSchemaEditor(BaseDatabaseSchemaEditor):
         elif isinstance(value, (bytes, bytearray, memoryview)):
             # Bytes are only allowed for BLOB fields, encoded as string
             # literals containing hexadecimal data and preceded by a single "X"
-            # character:
-            # value = b'\x01\x02' => value_hex = b'0102' => return X'0102'
-            value = bytes(value)
-            hex_encoder = codecs.getencoder('hex_codec')
-            value_hex, _length = hex_encoder(value)
-            # Use 'ascii' encoding for b'01' => '01', no need to use force_text here.
-            return "X'%s'" % value_hex.decode('ascii')
+            # character.
+            return "X'%s'" % value.hex()
         else:
             raise ValueError("Cannot quote parameter value %r of type %s" % (value, type(value)))
 

tests/gis_tests/gdal_tests/test_geom.py

 import json
 import pickle
-from binascii import b2a_hex
 
 from django.contrib.gis.gdal import (
     CoordTransform, GDALException, OGRGeometry, OGRGeomType, SpatialReference,
@@ -100,7 +99,7 @@ class OGRGeomTest(SimpleTestCase, TestDataMixin):
         for g in self.geometries.hex_wkt:
             geom1 = OGRGeometry(g.wkt)
             wkb = geom1.wkb
-            self.assertEqual(b2a_hex(wkb).upper(), g.hex.encode())
+            self.assertEqual(wkb.hex().upper(), g.hex)
             # Constructing w/WKB.
             geom2 = OGRGeometry(wkb)
             self.assertEqual(geom1, geom2)

tests/gis_tests/geos_tests/test_geos.py

@@ -2,7 +2,7 @@ import ctypes
 import json
 import pickle
 import random
-from binascii import a2b_hex, b2a_hex
+from binascii import a2b_hex
 from io import BytesIO
 from unittest import mock
 
@@ -102,7 +102,7 @@ class GEOSTest(SimpleTestCase, TestDataMixin):
         for g in self.geometries.hex_wkt:
             geom = fromstr(g.wkt)
             wkb = geom.wkb
-            self.assertEqual(b2a_hex(wkb).decode().upper(), g.hex)
+            self.assertEqual(wkb.hex().upper(), g.hex)
 
     def test_create_hex(self):
         "Testing creation from HEX."
@@ -115,7 +115,7 @@ class GEOSTest(SimpleTestCase, TestDataMixin):
     def test_create_wkb(self):
         "Testing creation from WKB."
         for g in self.geometries.hex_wkt:
-            wkb = memoryview(a2b_hex(g.hex.encode()))
+            wkb = memoryview(bytes.fromhex(g.hex))
             geom_h = GEOSGeometry(wkb)
             # we need to do this so decimal places get normalized
             geom_t = fromstr(g.wkt)

tests/utils_tests/test_crypto.py

-import binascii
 import hashlib
 import unittest
 
@@ -132,14 +131,12 @@ class TestUtilsCryptoPBKDF2(unittest.TestCase):
     def test_public_vectors(self):
         for vector in self.rfc_vectors:
             result = pbkdf2(**vector['args'])
-            self.assertEqual(binascii.hexlify(result).decode('ascii'),
-                             vector['result'])
+            self.assertEqual(result.hex(), vector['result'])
 
     def test_regression_vectors(self):
         for vector in self.regression_vectors:
             result = pbkdf2(**vector['args'])
-            self.assertEqual(binascii.hexlify(result).decode('ascii'),
-                             vector['result'])
+            self.assertEqual(result.hex(), vector['result'])
 
     def test_default_hmac_alg(self):
         kwargs = {'password': b'password', 'salt': b'salt', 'iterations': 1, 'dklen': 20}