python 2.7x中是否有像Javascript一样的对象传播语法? [英] Is there an Object spread syntax in python 2.7x like in Javascript?

问题描述

如何将对象/dict(?) 属性传播到新的对象/dict 中?

简单的Javascript:

const obj = {x: '2', y: '1'}const 东西 = {...obj, x: '1'}//东西 = {x: '1', y: 1}

蟒蛇:

regions = []对于locations_addresses['documents']中的文档:区域.附加({** doc, # 这行不通'纬度':'1234'，'lng': '1234',})返回 json.dumps({'regions': region, 'offices': []})

解决方案

如果你有 Python >=3.5，你可以在dict字面量中使用关键字扩展:

<预><代码>>>>d = {'x':'2'，'y':'1'}>>>{**d, 'x':1}{'x':1，'y':'1'}

这有时被称为喷溅".

如果您使用的是 Python 2.7，那么，没有等效项.这就是使用超过 7 年的东西的问题.您必须执行以下操作:

<预><代码>>>>d = {'x':'2'，'y':'1'}>>>x = {'x':1}>>>x.更新(d)>>>X{'x':'2'，'y':'1'}

How can I spread an objects/dict(?) properties and into a new object/dict?

Simple Javascript:

const obj = {x: '2', y: '1'}
const thing = {...obj, x: '1'}
// thing = {x: '1', y: 1}

Python:

regions = []
for doc in locations_addresses['documents']:
   regions.append(
        {
            **doc, # this will not work
            'lat': '1234',
            'lng': '1234',

        }
    )
return json.dumps({'regions': regions, 'offices': []})

解决方案

If you had Python >=3.5, you can use key-word expansion in dict literal:

>>> d = {'x': '2', 'y': '1'}
>>> {**d, 'x':1}
{'x': 1, 'y': '1'}

This is sometimes referred to as "splatting".

If you are on Python 2.7, well, there is no equivalent. That's the problem with using something that is over 7 years old. You'll have to do something like:

>>> d = {'x': '2', 'y': '1'}
>>> x = {'x':1}
>>> x.update(d)
>>> x
{'x': '2', 'y': '1'}

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