The PyPI Python module repository has temporarily suspended acceptance of
new users and project names.

New user and new project name registration on PyPI is temporarily
suspended. The volume of malicious users and malicious projects
being created on the index in the past week has outpaced our
ability to respond to it in a timely fashion, especially with
multiple PyPI administrators on leave.

Source: LWN.net – PyPI suspends new user/project registrations