Skip to content

add column.n_unique #337

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 1 commit into from
Dec 7, 2023
Merged

add column.n_unique #337

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
11 changes: 11 additions & 0 deletions spec/API_specification/dataframe_api/column_object.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -750,6 +750,17 @@ def var(
"""
...

def n_unique(self, *, skip_nulls: bool = True) -> Scalar:
"""Return number of unique values.

Notes
-----
If the original column(s) contain multiple `'NaN'` values, then
they only count as one distinct value.
Likewise for null values (if ``skip_nulls=False``).
"""
...

def cumulative_max(self) -> Self:
"""Reduction returns a Column.

Expand Down