email.utils does not exist in Python 2.4

[Ryan J Ollos]

This issue was raised in ​SO:20284917.

In [8081], the email.utils package was imported.

$ python2.5
Python 2.5.6 (r256:88840, Oct 28 2013, 23:50:06) 
[GCC 4.7.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import email.utils
>>> 
user@ubuntu:~/Workspace/bhdev$ python2.4
Python 2.4.6 (#2, Oct 28 2013, 20:07:19) 
[GCC 4.7.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import email.utils
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
ImportError: No module named utils

It appears that email.Utils existed in Python 2.4 and was renamed to email.utils in Python 2.5. Unfortunately this doesn't seem to have been captured in the ​Python documentation. ​Here is another ticket where they came to the same conclusion.

May I push the following change?

-from email.utils import parseaddr
+try
+    from email.utils import parseaddr
+except ImportError:  # python 2.4
+    from email.Utils import parseaddr

[Ryan J Ollos]

Now that I've caught up on recent activity, I see this is a duplicate of #11428 and #9106.

[Jun Omae]

Python 2.5 to 2.7 keep backwards compatibility for package naming of email library, see ​http://hg.python.org/cpython/file/ae9fb85ab4e0/Lib/email/__init__.py#l87.

$ for i in 2.{4,5,6,7}; do python$i -c 'from email.Utils import parseaddr; import sys; print "%r\n%r" % (sys.version_info, parseaddr)'; done
(2, 4, 3, 'final', 0)
<function parseaddr at 0xb7f233e4>
(2, 5, 6, 'final', 0)
<function parseaddr at 0x96a417c>
(2, 6, 8, 'final', 0)
<function parseaddr at 0xb7cb872c>
sys.version_info(major=2, minor=7, micro=2, releaselevel='final', serial=0)
<function parseaddr at 0x9d76cdc>