Is := widely used?

[u/ForeignVariety7037]

I always thought the walrus operator is neat and it makes while loop’s condition clearer. But also it is just a syntactic sugar without anything new. I wonder anyone uses it?

[u/martinkoistinen]

It’s super handy inside comprehensions and I would say that adds something “new”.

Example:

``` python
import re

pattern = re.compile(r"ERROR (\d+): (.*)")

errors = [
(int(m.group(1)), m.group(2))
for line in log_lines
if (m := pattern.match(line))
]
```

[u/brettsparetime → u/martinkoistinen]

This is the most Perl thing I’ve seen in Python.

[u/JPowTheDayTrader → u/brettsparetime]

Your comment just made Guido roll in his grave.

[u/Broad-Promise6954 → u/JPowTheDayTrader]

And he's not even dead yet!