关于python 3.6 ssl 权限的问题

1. 问题

当mac使用python3.6用urllib时候，会跳出错误，比如ssl.SSLError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed这类的

2. 解决

网上的教程一般是输入如下的命令安装certificate commond:/Applications/Python\ 3.6/Install\ Certificates.command
但是如果用brew安装的话，并没有这个目录，怎么办呢？
新建一个新的python3文件，运行如下代码。就可以了

import os
import os.path
import ssl
import stat
import subprocess
import sys

STAT_0o775 = (stat.S_IRUSR | stat.S_IWUSR | stat.S_IXUSR
              | stat.S_IRGRP | stat.S_IWGRP | stat.S_IXGRP
              | stat.S_IROTH | stat.S_IXOTH)


def main():
    openssl_dir, openssl_cafile = os.path.split(
        ssl.get_default_verify_paths().openssl_cafile)

    print(" -- pip install --upgrade certifi")
    subprocess.check_call([sys.executable,
                           "-E", "-s", "-m", "pip", "install", "--upgrade", "certifi"])

    import certifi

    # change working directory to the default SSL directory
    os.chdir(openssl_dir)
    relpath_to_certifi_cafile = os.path.relpath(certifi.where())
    print(" -- removing any existing file or link")
    try:
        os.remove(openssl_cafile)
    except FileNotFoundError:
        pass
    print(" -- creating symlink to certifi certificate bundle")
    os.symlink(relpath_to_certifi_cafile, openssl_cafile)
    print(" -- setting permissions")
    os.chmod(openssl_cafile, STAT_0o775)
    print(" -- update complete")


if __name__ == '__main__':
    main()