The buffering keyword argument expects one of three integers to determine the buffering policy.
buffering关键字参数的期望值是以下三个整数中的一个以决定缓冲策略。
Providing the ability to use a keyword argument is not essential, but it can make code with lots of arguments a lot clearer, and is not much extra work.
提供使用关键字参数的能力不是必需的，但它可以使带有许多参数的代码变得清楚许多，而且不需要大量的额外工作。
The new syntax is now to simply pass in a value to the keyword argument file in the print() function. For example
新的语法只要求给 print() 函数的关键字参数file传递一个值就可以了。
Return a new dictionary initialized from an optional positional argument or from a set of keyword arguments.
返回一个新的由可选的位置参数或一组关键字参数初始化的字典。
In general, an argument list must have any positional arguments followed by any keyword arguments, where the keywords must be chosen from the formal parameter names.
通常，参数列表中的每一个关键字都必须来自于形式参数，每个参数都有对应的关键字。
An argument that does not include a parameter name, so it is not a keyword argument.
位置参数：一种参数，没有参数名字，不是关键字参数。
If a key is specified both in the positional argument and as a keyword argument, the value associated with the keyword is retained in the dictionary.
如果一个键同时被指定位置参数和作为一个关键字参数，与其关键字相关的值被保留在dict中。
If a key is specified both in the positional argument and as a keyword argument, the value associated with the keyword is retained in the dictionary.
如果一个键同时被指定位置参数和作为一个关键字参数，与其关键字相关的值被保留在dict中。
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