env parsing in various languages

parse_env.py

def parse_env():
    vars = [ 
        "CERTFILE",
        "SERVER",
    ]   
    env = SimpleNamespace()
    for v in vars:
        setattr(env, v, os.environ[v])
    return env 

parseEnv.go

func parseEnv() (map[string]string) {
    pass := true
    m := make(map[string]string)
    for _, k := range []string{
        "GRPC_PORT",
        "GOOGLE_CLIENT_ID",
        "GOOGLE_CLIENT_SECRET",
        "CERTFILE",
        "KEYFILE",
    } { 
        v := os.Getenv(k)
        if v == "" {
            pass = false
            log.Printf("%s not set", k)
        } else {
            m[k] = v 
        }
    }   
    if !pass {
        log.Fatal("cannot start due to the above errors")
    }   
    return m
}