Collecting sphinx-gallery
  Using cached https://files.pythonhosted.org/packages/a3/7d/45c423ca42790ad53db2d54a23ca9131faa098107074a649f624b2b9ca42/sphinx-gallery-0.3.0.tar.gz
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/private/var/folders/6s/st61dq157dnd1nwd56hzy16h000153/T/pip-install-vvepem75/sphinx-gallery/setup.py", line 31, in <module>
        with open('requirements.txt', 'r') as fid:
    FileNotFoundError: [Errno 2] No such file or directory: 'requirements.txt'