Reposted by michael 📈 👨💻
michael 📈 👨💻
@mikedecr.computer
269 followers 295 following 403 posts
Low-latency quant finance R&D. Former political scientist, sometimes bike rider. Long form mikedecr.computer
Low-latency quant finance R&D. Former political scientist, sometimes bike rider. Long form mikedecr.computer
![Python code:
import polars as pl
class Columns:
def __getattr__(self, name) -> pl.Expr:
if name.startswith("_"):
raise AttributeError(name)
return pl.col(name)
def __getitem__(self, name) -> pl.Expr:
return pl.col(name)
c = Columns()
df = pl.DataFrame({"foo": [1, 2, 3], "bar": [4, 5, 6]})
df.with_columns(baz=c.foo + c.bar)
# shape: (3, 3)
# ┌─────┬─────┬─────┐
# │ foo ┆ bar ┆ baz │
# │ --- ┆ --- ┆ --- │
# │ i64 ┆ i64 ┆ i64 │
# ╞═════╪═════╪═════╡
# │ 1 ┆ 4 ┆ 5 │
# │ 2 ┆ 5 ┆ 7 │
# │ 3 ┆ 6 ┆ 9 │
# └─────┴─────┴─────┘](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:qjxju2w5sdit42sjb4qpnatk/bafkreiceozkeqxmhzvxd7ljkmv35t3zns43nbpk26xcox3llbmaxcx2wam)
![error[E0308]: mismatched types
--> /messages/10378318/80554717
|
1 | je suis aller à Paris
| ---- ^^^^^ expected past participle, got infinitive
| |
| because of this auxiliary verb
help: replace with: `allée`
|
1 | je suis allée à Paris
| -- ^^^^^ feminine past participle
| |
| this refers to a person with feminine pronouns
For more information about this error, try `frenchc --explain E0308`.
error: aborting due to 1 previous error](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:ym6n47hhl23xcx3hi7qncbh4/bafkreihntcysfj7vbvf5pnyb3uyayfekcfqfbg6wt2dvgoon5gzm4okpwi)
