Python中的'@ ='符号是什么? [英] What is the '@=' symbol for in Python?
问题描述
我知道@是用于装饰器的，但是@=在Python中是什么?只是保留一些未来的想法吗?
I know @ is for decorators, but what is @= for in Python? Is it just reservation for some future idea?
这只是我阅读tokenizer.py时遇到的许多问题之一.
This is just one of my many questions while reading tokenizer.py.
推荐答案
来自文档:
@(at)运算符旨在用于矩阵乘法.没有内置的Python类型实现此运算符.
The
@(at) operator is intended to be used for matrix multiplication. No builtin Python types implement this operator.
@运算符是Python 3.5中引入的.如您所料，@=是矩阵乘法，后跟赋值.它们映射到__matmul__，__rmatmul__或__imatmul__，类似于+和+=映射到__add__，__radd__或__iadd__的方式.
The @ operator was introduced in Python 3.5. @= is matrix multiplication followed by assignment, as you would expect. They map to __matmul__, __rmatmul__ or __imatmul__ similar to how + and += map to __add__, __radd__ or __iadd__.
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