getter没有在python API中公开，这是一个经常出现的主题，通常使用python对OpenSSL进行 Package 。为此，您必须对SSLContext.set_alpn_protocols方法进行monkey-patch，以便将提供的alpn协议存储在示例属性（或其他地方）中。这样，您就可以从应用程序的其他部分访问它。示例：

from functools import wraps
from ssl import SSLContext, create_default_context

def wrapper(set_alpn_protocols):
    """
    Wrapper designed for SSLContext.set_alpn_protocols
    """
    @wraps(set_alpn_protocols)
    def new_setter(self, alpn_protocols):
        set_alpn_protocols(self, alpn_protocols)  # This has no return value
        self._alpn_protocols = alpn_protocols  # You can change the attr name if you want

    return new_setter

SSLContext.set_alpn_protocols = wrapper(SSLContext.set_alpn_protocols)
context = create_default_context()
context.set_alpn_protocols(['h2', 'http/1.1'])

# Now if the setter was ever used, you can access it through _alpn_protocols attribute
try:
    print(context._alpn_protocols)
except AttributeError:
    print('setter was not called')

输出

['h2', 'http/1.1']