human
I wrote the below code

    def load_from_env(value, path):
        var_name = CONFIG_SEP.join(([CONFIG_PREFIX] + list(map((lambda s: s.upper()), path))))
        return os.environ.get(var_name, value)
    return map_leafs(load_from_env, config)

What's a good function header?
 ... Here's a good function header?
assistant
#Here's a good function header.

def env_config(config):