> For the complete documentation index, see [llms.txt](https://eastlakeside.gitbook.io/interpy-zh/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://eastlakeside.gitbook.io/interpy-zh/comprehensions/set-comprehensions.md).

# 集合推导式

它们跟列表推导式也是类似的。 唯一的区别在于它们使用大括号`{}`。 举个例子：

```python
squared = {x**2 for x in [1, 1, 2]}
print(squared)
# Output: {1, 4}
```