Traceback (most recent call last):


 "~/.pyenv/versions/3.7.1/lib/python3.7/site-packages/tox/helper/build_requires.py", line 7, in <module>

backend = __import__(backend_spec, fromlist=[None])
ModuleNotFoundError: No module named 'pep517_backend'

Traceback (most recent call last):


 "c:\users\user\python\work\my_env\lib\site-packages\pip\_vendor\requests\packages\__init__.py", line 27, in <module>

from . import urllib3


 "c:\users\user\python\work\my_env\lib\site-packages\pip\_vendor\requests\packages\urllib3\__init__.py", line 8, in <module>

from .connectionpool import (


 "c:\users\user\python\work\my_env\lib\site-packages\pip\_vendor\requests\packages\urllib3\connectionpool.py", line 7, in <module>

from socket import error as SocketError, timeout as SocketTimeout


 "C:\Python36\lib\socket.py", line 49, in <module>

import _socket
ModuleNotFoundError: No module named '_socket'
