錯誤信息：
C:\Users\ｔａｏｒｐ>pip install pipenv
WARNING: pip is configured with locations that require TLS/SSL, however the ssl module in Python is not available.
WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.")': /simple/pipenv/
WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.")': /simple/pipenv/
WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.")': /simple/pipenv/
WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.")': /simple/pipenv/
WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.")': /simple/pipenv/
Could not fetch URL https://pypi.org/simple/pipenv/: There was a problem confirming the ssl certificate: HTTPSConnectionPool(host='pypi.org', port=443): Max retries exceeded with url: /simple/pipenv/ (Caused by SSLError("Can't connect to HTTPS URL because the SSL module is not available.")) - skipping
ERROR: Could not find a version that satisfies the requirement pipenv (from versions: none)
ERROR: No matching distribution found for pipenv
WARNING: pip is configured with locations that require TLS/SSL, however the ssl module in Python is not available.
Could not fetch URL https://pypi.org/simple/pip/: There was a problem confirming the ssl certificate: HTTPSConnectionPool(host='pypi.org', port=443): Max retries exceeded with url: /simple/pip/ (Caused by SSLError("Can't connect to HTTPS URL because the SSL module is not available.")) - skipping
解決方案：
url的來源的問題,換成了國內的pip源就可以正常安裝了pip install pipenv -i http://pypi.douban.com/simple --trusted-host pypi.douban.com
1)http://mirrors.aliyun.com/pypi/simple/ 阿里雲
2)https://pypi.mirrors.ustc.edu.cn/simple/ 中國科技大學
3) http://pypi.douban.com/simple/ 豆瓣
4) https://pypi.tuna.tsinghua.edu.cn/simple/ 清華大學
5) http://pypi.mirrors.ustc.edu.cn/simple/ 中國科學技術大學