Using the current stable pip (1.5.5) to install matplotlib (1.3.1) does not pull in tornado for me, resulting in a broken build (build log is here: https://gist.github.com/megies/11539690).

(EDIT: Sorry.. I had to use --upgrade and then put --no-deps to avoid pip updating all of the dependencies and that resulted in tornado not getting pulled in. But still the Debian dependency should be addressed.. but maybe I should go to the Debian package maintainers?)

Furthermore the debian package (https://packages.debian.org/sid/python-matplotlib) lists python-tornado in "suggests" which means it doesn't get installed automatically which also resulted in problems for me (our package depends on matplotlib and I had to add python-tornado in our "depends" section to avoid problems).

Is this a known issue? Is there a valid reason for these two findings? Or is it just something that got overlooked at some point? Or am I missing something here..?