扣丁学堂python安装MySQL库引出的一些问题

1、首先用pip来安装pymysql

pipinstallmysql

报错：

cryptographyrequiressetuptools18.5ornewer,pleaseupgradetoanewversion

2、我想到的是更新pip

sudopipinstall--upgradepip

其实需要更新的是setuptools:

sudopipinstall-t/usr/local/lib/python3.6/site-packages/setuptools

3、使用pip将pymysql安装到想要的地方

针对多python版本的情况：

安装到python2.7:

sudopipinstallpymysql

安装到python3.4:

sudopipinstall-t/usr/local/lib/python3.4/site-packages/pymysql

安装到python3.6:

sudopipinstall-t/usr/local/lib/python3.6/site-packages/pymysql

安装到虚拟环境中：

sudopipinstall-t~/Pycharm/py36env/lib/python3.6/site-packagespymysql

报错：

CouldnotfetchURLhttps://pypi.python.org/simple/requests/:Therewasaproblemconfirmingthesslcertificate:Can'tconnecttoHTTPSURLbecausetheSSLmoduleisnotavailable.-skipping

解决方式：

sudopip--trusted-hostpypi.python.orginstall-t~/PycharmProjects/py36env/lib/python3.6/site-packages/mysql

问题解决。