ImportError: No module named builtins

[gp201]

I’m getting the following error. How do I resolve it?

Traceback (most recent call last):
File "/usr/lib/python2.7/runpy.py", line 174, in _run_module_as_main
   "__main__", fname, loader, pkg_name)
File "/usr/lib/python2.7/runpy.py", line 72, in _run_code
   exec code in run_globals
File "/home/user/oppia/oppia/scripts/start.py", line 30, in <module>
  import python_utils
File "python_utils.py", line 36, in <module>
  import builtins  # isort:skip
ImportError: No module named builtins

[gp201]

This seems to be happening because the future python package has not been installed.

You can fix this by following the instructions on the Troubleshooting wiki page.