python headers are required to build mercurial error while installing

OK, I have been biking mercurial for a while and wanted to upgrade to the latest version
In the process of that, I got the error python headers are required to build mercurial
Here is the fix.
Just add

sudo apt-get install build-essential gcc python-dev

which it was missing.

For re-installation follow the steps listed on https://help.ubuntu.com/community/Mercurial

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