Read write Lock concerns

[arvindh]

Guys, I am writing a config manager in python 2.7.14 spawning multi-threads and as a synchronization mechanism, I have to implement it via the second reader-writer problem's solution.

Google search revealed that there is no official support for read-write locks in threading module.
I had found these modules though,
rwlock - patch for threading module (But this has not been documented as it only a proposal)
prwlock - Not an official code
And some other custom python recipes.

Although these are unit tested code, I still don't want to take any chances.
Are there any other official modules containing this feature that I might be missing out?
And if there aren't any, is there any reason as to why this particular feature has not been developed in the threading module?

[ODIS]

There is an official file control module: https://docs.python.org/2.7/library/fcntl.html