How can I have autocomplete for python libraries in sublime

You can have this functionality with the Anaconda Package.

Anaconda includes a lot more features than just auto completetion. You can install the Jedi Package. This is the auto complete that ships with Anaconda.

try SublimeJEDI

step 1: ctrl+shift+p search - install package

step 2: Wait for few seconds until drop down box to appear

step 3: search Jedi - Python autocompletion and press enter

now auto completion for python will work in sublime..

Note: you can try Anaconda instead Jedi using same step.