Remove parameters strict_mode and newline.

python · serhiy-storchaka · Feb 6, 2026 · Mar 8, 2023 · Apr 26, 2025 · Apr 26, 2025
commit cc6d485e4c2787df094371877ace351ec8479afb
diff --git a/Doc/library/binascii.rst b/Doc/library/binascii.rst
@@ -145,14 +145,12 @@ The :mod:`binascii` module defines the following functions:
    .. versionadded:: next
 
 
-.. function:: a2b_base85(string, /, *, strict_mode=False)
+.. function:: a2b_base85(string, /)
 
    Convert Base85 data back to binary and return the binary data.
    More than one line may be passed at a time.
 
-   If *strict_mode* is true, only valid Base85 data will be converted.
    Invalid Base85 data will raise :exc:`binascii.Error`.
-
    Valid Base85 data contains characters from the Base85 alphabet in groups
    of five (except for the final group, which may have from two to five
    characters). Each group encodes 32 bits of binary data in the range from
@@ -161,26 +159,22 @@ The :mod:`binascii` module defines the following functions:
    .. versionadded:: next
 
 
-.. function:: b2a_base85(data, /, *, pad=False, newline=True)
+.. function:: b2a_base85(data, /, *, pad=False)
 
    Convert binary data to a line of ASCII characters in Base85 coding.
    The return value is the converted line.
 
    If *pad* is true, the input is padded to a multiple of 4 before encoding.
 
-   If *newline* is true, a newline char is appended to the result.
-
    .. versionadded:: next
 
 
-.. function:: a2b_z85(string, /, *, strict_mode=False)
+.. function:: a2b_z85(string, /)
 
    Convert Z85 data back to binary and return the binary data.
    More than one line may be passed at a time.
 
-   If *strict_mode* is true, only valid Z85 data will be converted.
    Invalid Z85 data will raise :exc:`binascii.Error`.
-
    Valid Z85 data contains characters from the Z85 alphabet in groups
    of five (except for the final group, which may have from two to five
    characters). Each group encodes 32 bits of binary data in the range from
@@ -191,15 +185,13 @@ The :mod:`binascii` module defines the following functions:
    .. versionadded:: next
 
 
-.. function:: b2a_z85(data, /, *, pad=False, newline=True)
+.. function:: b2a_z85(data, /, *, pad=False)
 
    Convert binary data to a line of ASCII characters in Z85 coding.
    The return value is the converted line.
 
    If *pad* is true, the input is padded to a multiple of 4 before encoding.
 
-   If *newline* is true, a newline char is appended to the result.
-
    See `Z85 specification <https://rfc.zeromq.org/spec/32/>`_ for more information.
 
    .. versionadded:: next

diff --git a/Lib/base64.py b/Lib/base64.py
@@ -382,25 +382,25 @@ def b85encode(b, pad=False):
     If pad is true, the input is padded with b'\\0' so its length is a multiple of
     4 bytes before encoding.
     """
-    return binascii.b2a_base85(b, pad=pad, newline=False)
+    return binascii.b2a_base85(b, pad=pad)
 
 def b85decode(b):
     """Decode the base85-encoded bytes-like object or ASCII string b
 
     The result is returned as a bytes object.
     """
-    return binascii.a2b_base85(b, strict_mode=True)
+    return binascii.a2b_base85(b)
 
 def z85encode(s, pad=False):
     """Encode bytes-like object b in z85 format and return a bytes object."""
-    return binascii.b2a_z85(s, pad=pad, newline=False)
+    return binascii.b2a_z85(s, pad=pad)
 
 def z85decode(s):
     """Decode the z85-encoded bytes-like object or ASCII string b
 
     The result is returned as a bytes object.
     """
-    return binascii.a2b_z85(s, strict_mode=True)
+    return binascii.a2b_z85(s)
 
 # Legacy interface.  This code could be cleaned up since I don't believe
 # binascii has any line length limitations.  It just doesn't seem worth it

diff --git a/Lib/test/test_binascii.py b/Lib/test/test_binascii.py
@@ -536,49 +536,30 @@ def test_base85_valid(self):
         self.assertEqual(res, self.rawdata)
 
         # Test decoding inputs with length 1 mod 5
-        self.assertEqual(binascii.a2b_base85(self.type2test(b"a")), b"")
-        self.assertEqual(binascii.a2b_base85(self.type2test(b" b ")), b"")
-        self.assertEqual(binascii.a2b_base85(self.type2test(b"b/Y\"*,j'Nc")), b"test")
-
-    def test_base85_invalid(self):
-        # Test base85 with invalid characters interleaved
-        lines, i = [], 0
-        for k in range(1, len(self.rawdata) + 1):
-            b = self.type2test(self.rawdata[i:i + k])
-            a = binascii.b2a_base85(b)
-            lines.append(a)
-            i += k
-            if i >= len(self.rawdata):
-                break
-
-        fillers = bytearray()
-        valid = b"0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ" \
-                b"abcdefghijklmnopqrstuvwxyz!#$%&()*+-;<=>?@^_`{|}~"
-        for i in range(256):
-            if i not in valid:
-                fillers.append(i)
-        def addnoise(line):
-            res = bytearray()
-            for i in range(len(line)):
-                res.append(line[i])
-                for j in range(i, len(fillers), len(line)):
-                    res.append(fillers[j])
-            return res
-        res = bytearray()
-        for line in map(addnoise, lines):
-            a = self.type2test(line)
-            b = binascii.a2b_base85(a)
-            res += b
-        self.assertEqual(res, self.rawdata)
+        self.assertEqual(binascii.a2b_base85(self.type2test(b'a')), b'')
+        self.assertEqual(binascii.a2b_base85(self.type2test(b'a')), b'')
+        self.assertEqual(binascii.a2b_base85(self.type2test(b'ab')), b'q')
+        self.assertEqual(binascii.a2b_base85(self.type2test(b'abc')), b'qa')
+        self.assertEqual(binascii.a2b_base85(self.type2test(b'abcd')), b'qa\x9e')
+        self.assertEqual(binascii.a2b_base85(self.type2test(b'abcde')), b'qa\x9e\xb6')
+        self.assertEqual(binascii.a2b_base85(self.type2test(b'abcdef')), b'qa\x9e\xb6')
 
     def test_base85_errors(self):
         def _assertRegexTemplate(assert_regex, data, **kwargs):
             with self.assertRaisesRegex(binascii.Error, assert_regex):
                 binascii.a2b_base85(self.type2test(data), **kwargs)
 
+        def assertNonBase85Data(data):
+            _assertRegexTemplate(r"(?i)bad base85 character", data)
+
         def assertOverflow(data):
             _assertRegexTemplate(r"(?i)base85 overflow", data)
 
+        assertNonBase85Data(b"\xda")
+        assertNonBase85Data(b"00\0\0")
+        assertNonBase85Data(b"Z )*")
+        assertNonBase85Data(b"bY*jNb0Hyq\n")
+
         # Test base85 with out-of-range encoded value
         assertOverflow(b"}")
         assertOverflow(b"|O")
@@ -599,29 +580,6 @@ def test_base85_pad(self):
             b_pad_expected = b + b"\0" * padding
             self.assertEqual(b_pad, b_pad_expected)
 
-    def test_base85_strict_mode(self):
-        # Test base85 with strict mode on
-        def assertNonBase85Data(data, expected):
-            data = self.type2test(data)
-            with self.assertRaisesRegex(binascii.Error, r"(?i)bad base85 character"):
-                binascii.a2b_base85(data, strict_mode=True)
-            default_res = binascii.a2b_base85(data)
-            non_strict_res = binascii.a2b_base85(data, strict_mode=False)
-            self.assertEqual(default_res, non_strict_res)
-            self.assertEqual(non_strict_res, expected)
-
-        assertNonBase85Data(b"\xda", b"")
-        assertNonBase85Data(b"00\0\0", b"\0")
-        assertNonBase85Data(b"Z )*", b"ok")
-        assertNonBase85Data(b"bY*jNb0Hyq\n", b"tests!!~")
-
-    def test_base85_newline(self):
-        # Test base85 newline parameter
-        b = self.type2test(b"t3s\t ")
-        self.assertEqual(binascii.b2a_base85(b), b"bTe}aAO\n")
-        self.assertEqual(binascii.b2a_base85(b, newline=True), b"bTe}aAO\n")
-        self.assertEqual(binascii.b2a_base85(b, newline=False), b"bTe}aAO")
-
     def test_z85_valid(self):
         # Test Z85 with valid data
         lines, i = [], 0
@@ -640,49 +598,30 @@ def test_z85_valid(self):
         self.assertEqual(res, self.rawdata)
 
         # Test decoding inputs with length 1 mod 5
-        self.assertEqual(binascii.a2b_z85(self.type2test(b"a")), b"")
-        self.assertEqual(binascii.a2b_z85(self.type2test(b" b ")), b"")
-        self.assertEqual(binascii.a2b_z85(self.type2test(b"B y,/;J_n\\c")), b"test")
-
-    def test_z85_invalid(self):
-        # Test Z85 with invalid characters interleaved
-        lines, i = [], 0
-        for k in range(1, len(self.rawdata) + 1):
-            b = self.type2test(self.rawdata[i:i + k])
-            a = binascii.b2a_z85(b)
-            lines.append(a)
-            i += k
-            if i >= len(self.rawdata):
-                break
-
-        fillers = bytearray()
-        valid = b"0123456789abcdefghijklmnopqrstuvwxyz" \
-                b"ABCDEFGHIJKLMNOPQRSTUVWXYZ.-:+=^!/*?&<>()[]{}@%$#"
-        for i in range(256):
-            if i not in valid:
-                fillers.append(i)
-        def addnoise(line):
-            res = bytearray()
-            for i in range(len(line)):
-                res.append(line[i])
-                for j in range(i, len(fillers), len(line)):
-                    res.append(fillers[j])
-            return res
-        res = bytearray()
-        for line in map(addnoise, lines):
-            a = self.type2test(line)
-            b = binascii.a2b_z85(a)
-            res += b
-        self.assertEqual(res, self.rawdata)
+        self.assertEqual(binascii.a2b_z85(self.type2test(b'')), b'')
+        self.assertEqual(binascii.a2b_z85(self.type2test(b'a')), b'')
+        self.assertEqual(binascii.a2b_z85(self.type2test(b'ab')), b'\x1f')
+        self.assertEqual(binascii.a2b_z85(self.type2test(b'abc')), b'\x1f\x85')
+        self.assertEqual(binascii.a2b_z85(self.type2test(b'abcd')), b'\x1f\x85\x9a')
+        self.assertEqual(binascii.a2b_z85(self.type2test(b'abcde')), b'\x1f\x85\x9a$')
+        self.assertEqual(binascii.a2b_z85(self.type2test(b'abcdef')), b'\x1f\x85\x9a$')
 
     def test_z85_errors(self):
         def _assertRegexTemplate(assert_regex, data, **kwargs):
             with self.assertRaisesRegex(binascii.Error, assert_regex):
                 binascii.a2b_z85(self.type2test(data), **kwargs)
 
+        def assertNonZ85Data(data):
+            _assertRegexTemplate(r"(?i)bad z85 character", data)
+
         def assertOverflow(data):
             _assertRegexTemplate(r"(?i)z85 overflow", data)
 
+        assertNonZ85Data(b"\xda")
+        assertNonZ85Data(b"00\0\0")
+        assertNonZ85Data(b"z !/")
+        assertNonZ85Data(b"By/JnB0hYQ\n")
+
         # Test Z85 with out-of-range encoded value
         assertOverflow(b"%")
         assertOverflow(b"%n")
@@ -703,29 +642,6 @@ def test_z85_pad(self):
             b_pad_expected = b + b"\0" * padding
             self.assertEqual(b_pad, b_pad_expected)
 
-    def test_z85_strict_mode(self):
-        # Test Z85 with strict mode on
-        def assertNonZ85Data(data, expected):
-            data = self.type2test(data)
-            with self.assertRaisesRegex(binascii.Error, r"(?i)bad z85 character"):
-                binascii.a2b_z85(data, strict_mode=True)
-            default_res = binascii.a2b_z85(data)
-            non_strict_res = binascii.a2b_z85(data, strict_mode=False)
-            self.assertEqual(default_res, non_strict_res)
-            self.assertEqual(non_strict_res, expected)
-
-        assertNonZ85Data(b"\xda", b"")
-        assertNonZ85Data(b"00\0\0", b"\0")
-        assertNonZ85Data(b"z !/", b"ok")
-        assertNonZ85Data(b"By/JnB0hYQ\n", b"tests!!~")
-
-    def test_z85_newline(self):
-        # Test Z85 newline parameter
-        b = self.type2test(b"t3s\t ")
-        self.assertEqual(binascii.b2a_z85(b), b"BtE$Aao\n")
-        self.assertEqual(binascii.b2a_z85(b, newline=True), b"BtE$Aao\n")
-        self.assertEqual(binascii.b2a_z85(b, newline=False), b"BtE$Aao")
-
     def test_uu(self):
         MAX_UU = 45
         for backtick in (True, False):