IPyWalrus

IPyWalrus是一个简单的IPython（Jupyter）扩展，允许您在IPython或Jupyter中使用walrus运算符（PEP 572 - 赋值表达式）:=进行常规赋值。

PEP的这一部分

There are a few places where assignment expressions are not allowed, in order to avoid ambiguities or user confusion:

Unparenthesized assignment expressions are prohibited at the top level of an expression statement. Example:

y := f(x)  # INVALID
(y := f(x))  # Valid, though not recommended

This rule is included to simplify the choice for the user between an assignment statement and an assignment expression -- there is no syntactic position where both are valid.

完全有效，但我的IPython会话中的Jupyter笔记本充满了这样的单元格

并且因为它在纯Python中不起作用

我准备了一个小的扩展，使其工作

用法

从pip安装扩展或下载ipywalrus.py并将其放入PYTHONPATH中的某个位置

# pip install ipywalrus

并在IPython或Jupyter中加载它

%load_ext ipywalrus

如果您想永久启用此扩展，创建默认配置文件（如果您还没有的话）ipython profile create然后向~/.ipython/profile_default/ipython_config.py中的扩展列表中添加ipywalrus。

许可证

MIT