mac中pipenv --python 3.7 出错

Courtesy Notice: Pipenv found itself running within a virtual environment, so it will automatically use that environment, instead of creating its own for any project. You can set PIPENV_IGNORE_VIRTUALENVS=1 to force pipenv to ignore that environment and create its own instead. You can set PIPENV_VERBOSITY=-1 to suppress this warning.
Creating a Pipfile for this project…

设置环境变量：

export PIPENV_IGNORE_VIRTUALENVS=1
或者：export VIRTUALENV_ALWAYS_COPY=1