Pipenv Django安装:解析要求失败

我是个新手，不熟悉pipenv和Mac终端的安装。我试图通过pipenv安装Django，但得到以下错误：

File "/Users/sidm/Library/Python/2.7/lib/python/site-packages/pipenv/vendor/requirementslib/models/requirements.py", line 969, in _parse_name_from_line
    "Failed parsing requirement from {0!r}".format(self.line)
pipenv.vendor.requirementslib.exceptions.RequirementError: Failed parsing requirement from u'--python3.7'

如果有人能帮我解决这个问题，我将不胜感激。干杯。