conda stuck on Proceed ([y]/n)? when updating packages in ipython console

You can launch shell commands with the ! operator in ipython, but you can’t interact with them after the process has launched.

Therefore, you could:

1. execute your conda command outside of your ipython session (IOW, a normal shell); or
2. pass the --yes flag. e.g.:

!conda create -n graphlab-env python=2.7 anaconda -y