解决pip升级：版本18.0.1升级到19.0.3的问题：
在安装django的时候，出现了pip版本升级的提示：
(因为我的pycharm上显示的pip是19.0.3而CMD安装时，却提示我是18.0.1，然后我按照其提示升级，升级失败；)
You are using pip version 18.0.1, however version 19.0.3 is available. You should consider upgradin...
网上找了解决办法：
1、管理员运行CMD：python -m pip install --upgrade pip还是没有用，依然会有黄色的SSL连接不上的报错
无奈之下，继续查询解决办法：皇天不负有心人终于找到解决办法，特此记下。
方法如下：
1、百度进入pip网站：/project/pip/#description 点击download Files
2、此时可以看到一个文件：pip-19.0.3-py2.py3-none-any.whl，选择最新的符合你要求的whl文件下载下来，将其放在E盘（其他盘也行）的根目录下，以便查找；
3、最后管理员运行CMD：
C:\WINDOWS\system32>E:E:\>python -m pip install pip-19.0.3-py2.py3-none-any.whl查看pip版本命令：pip -V
我在pycharm添加时安装django、virtualenv这些第三方库的时候，而且总是报错：（Django在命令行显示安装成功，但是在pyCharm创建Django工程的时候出错。）
C:\Users\Administrator>pip install virtualenv
Collecting virtualenv
Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by ‘SSLError(SSLCertVerificationError(1, ‘[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1056)’))’: /simple/virtualenv/
Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by ‘SSLError(SSLCertVerificationError(1, ‘[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1056)’))’: /simple/virtualenv/
Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by ‘SSLError(SSLCertVerificationError(1, ‘[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1056)’))’: /simple/virtualenv/
Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by ‘SSLError(SSLCertVerificationError(1, ‘[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1056)’))’: /simple/virtualenv/
Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by ‘SSLError(SSLCertVerificationError(1, ‘[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1056)’))’: /simple/virtualenv/
Could not fetch URL /simple/virtualenv/: There was a problem confirming the ssl certificate: HTTPSConnectionPool(host=‘’, port=443): Max retries exceeded with url: /simple/virtualenv/ (Caused by SSLError(SSLCertVerificationError(1, ‘[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1056)’))) - skipping
解决办法：找到自己电脑的internet连接，然后在使用代理器一栏里，关闭代理；然后再重新再安装第三方库，pycharm里面的添加类库添加；
