User-Agent:       Mozilla/5.0 (X11; Linux x86_64; rv:34.0) Gecko/20100101
Firefox/34.0
Build Identifier: 

After updating Python 2.7.48 -> 2.7.56 Apache don't start any longer.
Debug error message:
  File "/usr/lib/python2.7/_weakrefset.py", line 5, in <module>
    from _weakref import ref
ImportError: No module named _weakref


Reproducible: Always

Steps to Reproduce:
1.Update Python 2.7.48
2.Start apache2
3.
Actual Results:  
]
# rcapache2 start  
Starting httpd2 (prefork) [Sun Jan 18 20:31:08 2015]         failed


Expected Results:  
rcapache2 start
Starting httpd2 (prefork) [Sun Jan 18 20:46:01 2015]         done

Diff between codes version 2.7.48 and 2.7.56
Module weakrefset
69c69,73
<         return ref(item) in self.data
---
>         try:
>             wr = ref(item)
>         except TypeError:
>             return False
>         return wr in self.data