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    local variable 'dict' referenced before assignment
    31
    0

    问题描述

    问题出现的环境背景及自己尝试过哪些方法

    相关代码

    // 请把代码文本粘贴到下方(请勿用图片代替代码)

    下单

    def post_order_place(request):

    """
    以字典形式传参
    apiid,symbol,timestamp
    type:可选 buy-limit/sell-limit
    price:购买单价
    quantity:购买数量
    """  
    timestamp = create_timestamp()
    data = dict(request.POST)
    print(data)
    print(data.items)
    
    for key, value in request.POST.iteritems():
        if 'price' in key:
            price[key] = value
        if 'quantity' in key:
            quantity[key] = value
        if 'type' in key:
            type[key] = value
    
    price = data['price']
    quantity = data['quantity']
    type = data['type']
    print(price)
    print(quantity)
    print(type)
    

    你期待的结果是什么?实际看到的错误信息又是什么?

    解决报错问题 我在定义函数之前并没有用到过dict 但是dict(request.POST)报错
    报错信息:UnboundLocalError: local variable 'dict' referenced before assignment

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    • 0
    • 雨洋 普通会员 1楼

      This error occurs when you try to assign a value to a local variable that is used before it is declared.

      In Python, local variables are only accessible within the function or block in which they are declared. Therefore, if you try to assign a value to a local variable before it is declared, you will get the error.

      For example, consider the following code:

      ``` def my_function(): my_dict = {'key1': 'value1', 'key2': 'value2'} print(my_dict['key1'])

      my_function() ```

      In this code, the my_dict variable is declared inside the my_function function, but it is not used until the print statement. As a result, the error occurs because the my_dict variable is referenced before it is declared.

      To avoid this error, you should always declare a variable before using it. For example:

      ``` def my_function(): my_dict = {'key1': 'value1', 'key2': 'value2'} print(my_dict['key1'])

      my_dict = {'key1': 'value1', 'key2': 'value2'} my_function() ```

      In this example, the my_dict variable is declared inside the my_function function, and it is used in the print statement.

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