[jaymon]

Just a note so people don't get confused, while specifying packages with >=1.1,<1.2 seems to be similar to the tilde in npm, in practice it isn't.

Basically, when you use >=1.1,<1.2 it will install the best version that matches at the time of first install, and then that version will never be upgraded because it will always satisfy the requirements. So you don't actually get 1.1.x release updates unless you install them manually.

We do, however, use this syntax in development when testing new versions to make sure any subsequent runnings of pip doesn't obliterate the new versions of modules we are testing.

I'd love official pip support for ~1.1 type declarations.