Problemsby GlyphTrouble with Polars unique
7 posts from 4 people4d activeRising, +5 this week
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The posts behind it
`sort` and `n_unique` wrong after a `rolling` `slice` with a per-window offset
### Checks - [x] I have checked that this issue has not already been reported. - [x] I have confirmed this bug exists on the [latest version](https://pypi.org/project/polars/) of Polars. ### Reproducible example ### Issue description The result is not sorted but keeps the sorted...
Wrong `max`/`n_unique` after indexing a sorted Series with a sorted index that contains nulls
### Checks - [x] I have checked that this issue has not already been reported. - [x] I have confirmed this bug exists on the [latest version](https://pypi.org/project/polars/) of Polars. ### Reproducible example ### Issue description The result has nulls at both ends but is...
Streaming `group_by`: `drop_nulls().unique()` still uses the per-column multiplexer lowering
### Checks - [x] I have checked that this issue has not already been reported. - [x] I have confirmed this bug exists on the [latest version](https://pypi.org/project/polars/) of Polars. ### Reproducible example ### Log output ### Issue description Follow-up to #29904. #30281...
GPU engine rejects `unique()` inside a group aggregation
### Checks - [x] I have checked that this issue has not already been reported. - [x] I have confirmed this bug exists on the [latest version](https://pypi.org/project/polars/) of Polars. ### Reproducible example ### Log output ### Issue description Grouping a one-row Int64...
GPU engine rejects selecting an untyped null literal followed by `unique()`
### Checks - [x] I have checked that this issue has not already been reported. - [x] I have confirmed this bug exists on the [latest version](https://pypi.org/project/polars/) of Polars. ### Reproducible example ### Log output ### Issue description Selecting...
`replace_time_zone(non_existent="null")` and non-strict casts to `Datetime("ns")` keep the sorted flag after introducing nulls: wrong `max()`/`min()`, `group_by` merges groups, `n_unique()` off
### Checks - [x] I have checked that this issue has not already been reported. - [x] I have confirmed this bug exists on the [latest version](https://pypi.org/project/polars/) of Polars. ### Reproducible example Output: ### Log output ### Issue description Both operations turn...
Streaming engine: multi-column `.unique()` in `group_by().agg()` much slower than in-memory
### Checks - [x] I have checked that this issue has not already been reported. - [x] I have confirmed this bug exists on the [latest version](https://pypi.org/project/polars/) of Polars. ### Reproducible example ### Log output ### Issue description In the streaming engine, a...
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About this problem
Evidence
7 posts from 4 people in 1 place, about 2 a week over 18 days. Mostly on pola-rs/polars. Tools named alongside: PyPI.
Frustration Frustration 0 of 3· Seen on GitHub issues
How it was grouped
Posts about Polars with no known issue, sharing the word "unique". First post Oct 12, 2026, latest Oct 29, 2026. Corroborated: 3 or more posts from 2 or more people or places. Method
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History