公司app登錄接口在傳參時，有個加密字段“——key”。在使用python做接口測試時，調研可以通過Crypto包進行加密處理，而Crypto包是第三方包，需要進行安裝。
1.使用python3 -m pip install Crypto進行安裝；
結果，安裝失敗，報錯如下：
Could not fetch URL https://pypi.org/simple/crypto/: There was a problem confirming the ssl certificate: HTTPSConnectionPool(host='pypi.org', port=443): Max retries exceeded with url: /simple/crypto/ (Caused by SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate in certificate chain (_ssl.c:1122)'))) - skipping ERROR: Could not find a version that satisfies the requirement Crypto (from versions: none) ERROR: No matching distribution found for Crypto 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(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate in certificate chain (_ssl.c:1122)'))) - skipping
在網上搜索解決方法后，修改了安裝命令。
2.使用命令python3 -m pip --trusted-host pypi.org install Crypto進行安裝；
結果，仍然安裝失敗，報錯如下：
ERROR: Could not install packages due to an EnvironmentError: HTTPSConnectionPool(host='files.pythonhosted.org', port=443): Max retries exceeded with url: /packages/fc/bb/0b812dc02e6357606228edfbf5808f5ca0a675a84273578c3a199e841cd8/crypto-1.4.1-py2.py3-none-any.whl (Caused by SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate in certificate chain (_ssl.c:1122)')))
繼續尋找解決方法，修改了安裝源，指定為豆瓣的鏡像源。
3.python3 -m pip install Crypto -i http://pypi.douban.com/simple --trusted-host pypi.douban.com
結果，安裝成功。如下：
Installing collected packages: shellescape, pyyaml, Naked, Crypto
Successfully installed Crypto-1.4.1 Naked-0.1.31 pyyaml-5.4.1 shellescape-3.8.1
到了這一步，Crypto算是安裝成功了，但是在使用from Crypto.PublicKey import RSA導入時，提示並沒有Crypto庫。果然不會這么順利的，又在網上查找解決方法。
在進到python3安裝路徑后，進到site-packages目錄，查看包名是小寫的（crypto，crypto-1.4.1.dist-info），於是將首字母修改為大寫。
當再次導入包時from Crypto.PublicKey import RSA，又提示沒有PublicKey，沒轍，又在網上搜索解決辦法，找到個答案說需要安裝pycryptodome。還能怎么辦，繼續安裝唄！
4.python3 -m pip install pycryptodome -i http://pypi.douban.com/simple --trusted-host pypi.douban.com
至此，終於完成安裝了。
記此，避免后續繼續踩坑。