ImportError: cannot import name 'certs'

Question

I'm having this error for the last 2 days. It seems a problem with python requests library, but I've re-installed it several times with no luck.

Traceback (most recent call last):
    File "project-src/bla-blah/manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
    File "project-src\env\lib\site-packages\django\core\management\__init__.py", line 385, in execute_from_command_line
    utility.execute()
    File "project-src\env\lib\site-packages\django\core\management\__init__.py", line 354, in execute
    django.setup()
    File "project-src\env\lib\site-packages\django\__init__.py", line 21, in setup
    apps.populate(settings.INSTALLED_APPS)
    File "project-src\env\lib\site-packages\django\apps\registry.py", line 85, in populate
    app_config = AppConfig.create(entry)
    File "project-src\env\lib\site-packages\django\apps\config.py", line 112, in create
    mod = import_module(mod_path)
    File "C:\Python34\lib\importlib\__init__.py", line 109, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
    File "<frozen importlib._bootstrap>", line 2254, in _gcd_import
    File "<frozen importlib._bootstrap>", line 2237, in _find_and_load
    File "<frozen importlib._bootstrap>", line 2226, in _find_and_load_unlocked
    File "<frozen importlib._bootstrap>", line 1200, in _load_unlocked
    File "<frozen importlib._bootstrap>", line 1129, in _exec
    File "<frozen importlib._bootstrap>", line 1471, in exec_module
    File "<frozen importlib._bootstrap>", line 321, in _call_with_frames_removed
    File "project-src\env\lib\site-packages\social\apps\django_app\__init__.py", line 14, in <module>
    from social.apps.django_app.utils import load_strategy
    File "project-src\env\lib\site-packages\social\apps\django_app\utils.py", line 12, in <module>
    from social.backends.utils import get_backend
    File "project-src\env\lib\site-packages\social\backends\utils.py", line 2, in <module>
    from social.backends.base import BaseAuth
    File "project-src\env\lib\site-packages\social\backends\base.py", line 1, in <module>
    from requests import request, ConnectionError
    File "project-src\env\lib\site-packages\requests\__init__.py", line 58, in <module>
    from . import utils
    File "project-src\env\lib\site-packages\requests\utils.py", line 24, in <module>
    from . import certs

    ImportError: cannot import name 'certs'

Maybe it's a problem with Windows 7 update from 2 days ago, because is the only thing that has changed in the last few days.

By the way, I'm using python 3.4 with virtualenv, PyCharm 3.4.1 IDE and Win7.

Inside certs.py there is the code that has the problem (last line):

try:
    from certifi import where
except ImportError:
    def where():
        """Return the preferred certificate bundle."""
        # vendored bundle inside Requests
        return os.path.join(os.path.dirname(__file__), 'cacert.pem')

Answer 1

This worked for me (re-install requests library):

pip uninstall requests pip install requests

Answer 2

I had also the same problem last week on my Mac (Sierra). Besides, the certs.py module exists, which means that's a problem somehow related to the OS and not to Python itself. In my case, it was a problem of the max files limits, So just increase it with ulimit 200000 200000