Flask 中的全局变量返回未定义

Question

大家好，我确实有脚本的这一部分：

global auth, username, password, index, authType, rotation # Frist try - doesn't work
auth, username, password, index, authType, rotation = None # Second try - doesn't work either


        
@app.route("/set", methods=["GET","POST"])
def setup():
    auth = request.args.get("auth", type=str)
    username = request.args.get("username", type=str)
    password = request.args.get("password", type=str)
    index = request.args.get("index")
    authType = request.args.get("type", type=str)
    rotation = request.args.get("rotation", type=str)
    
    print(authType)

    return anotherMethod()

def anotherMethod():
    #Do something here with authThype mentioned above.
    return "succes"

在这种情况下， authType get 是一个未定义的错误。 另外，我尝试将上面的所有变量设置为“无”，并且删除了“全局”声明，因为我想在一个请求中获取它们，然后将它们处理到其他方法中，而不将它们作为方法变量发送，但这些方法都没有工作。

你们对如何处理通过 api 调用发送到同一 .py 文件的其他方法中的变量有很好的想法吗？

Answer 1

您不需要使用全局变量。 request.args.get()默认为字符串，所以不需要。 试试这个来诊断：

@app.route("/set", methods=["GET","POST"])
def setup():

    auth     = request.args.get("auth")
    username = request.args.get("username")
    password = request.args.get("password")
    index    = request.args.get("index")
    authType = request.args.get("type", "no type arg sent")
    rotation = request.args.get("rotation")
    
    print(authType)
    return anotherMethod(authType)

def anotherMethod(authType=None):
    print(f"authType is {authType} inside anotherMethod()")
    return "success"

编辑：

如果你坚持使用全局变量。 你需要在函数中声明它们（如果你想在那里改变它们）：

auth = username = password = index = authType = rotation = None

@app.route("/set", methods=["GET","POST"])
def setup():

    global auth, username, password, index, authType, rotation

    auth     = request.args.get("auth")
    username = request.args.get("username")
    password = request.args.get("password")
    index    = request.args.get("index")
    authType = request.args.get("type", "no type arg sent")
    rotation = request.args.get("rotation")
    
    print(authType)
    return anotherMethod()

def anotherMethod():
    print(f"authType is {authType} inside anotherMethod()")
    return "success"

另一种解决方案：

不确定为什么您不想将值作为方法变量传递，但这可能符合您的愿望。 嵌套函数：

@app.route("/set", methods=["GET","POST"])
def setup():

    auth     = request.args.get("auth")
    username = request.args.get("username")
    password = request.args.get("password")
    index    = request.args.get("index")
    authType = request.args.get("type", "no type arg sent")
    rotation = request.args.get("rotation")
    
    print(authType)

    def anotherMethod():
        print(f"authType is {authType} inside anotherMethod()")
        return "success"

    print(anotherMethod())