[Nottingham] Python behind proxy

[stripes theotoky]

Yet another problem,

I am behind a corporate proxy at present and I find that scripts using
python time out, for example

sudo add-apt-repository ppa:voria/ppa

and

sudo python -c "import sys; py3 = sys.version_info[0] > 2; u =
__import__('urllib.request' if py3 else 'urllib', fromlist=1);
exec(u.urlopen('http://status.calibre-ebook.com/linux_installer').read());
main()"

both eventually time out. I don't know where or how to tell python about
the proxy server so can't update calibre and had to add the repository by
directly editing the sources.list.

Suggestions on how to fix it most welcome.

Stripes.
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