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-rw-r--r--Doc/library/ipaddress.rst19
1 files changed, 17 insertions, 2 deletions
diff --git a/Doc/library/ipaddress.rst b/Doc/library/ipaddress.rst
index d6d1f1e..1c2263b 100644
--- a/Doc/library/ipaddress.rst
+++ b/Doc/library/ipaddress.rst
@@ -104,8 +104,7 @@ write code that handles both IP versions correctly. Address objects are
1. A string in decimal-dot notation, consisting of four decimal integers in
the inclusive range 0--255, separated by dots (e.g. ``192.168.0.1``). Each
integer represents an octet (byte) in the address. Leading zeroes are
- tolerated only for values less than 8 (as there is no ambiguity
- between the decimal and octal interpretations of such strings).
+ not tolerated to prevent confusion with octal notation.
2. An integer that fits into 32 bits.
3. An integer packed into a :class:`bytes` object of length 4 (most
significant octet first).
@@ -117,6 +116,22 @@ write code that handles both IP versions correctly. Address objects are
>>> ipaddress.IPv4Address(b'\xC0\xA8\x00\x01')
IPv4Address('192.168.0.1')
+ .. versionchanged:: 3.8
+
+ Leading zeros are tolerated, even in ambiguous cases that look like
+ octal notation.
+
+ .. versionchanged:: 3.10
+
+ Leading zeros are no longer tolerated and are treated as an error.
+ IPv4 address strings are now parsed as strict as glibc
+ :func:`~socket.inet_pton`.
+
+ .. versionchanged:: 3.9.5
+
+ The above change was also included in Python 3.9 starting with
+ version 3.9.5.
+
.. attribute:: version
The appropriate version number: ``4`` for IPv4, ``6`` for IPv6.