From e739d13a5bee3c509f7514a94a97e33d2db2fade Mon Sep 17 00:00:00 2001
From: Stijn de Gooijer <stijn@degooijer.io>
Date: Sat, 14 Oct 2023 20:05:59 +0200
Subject: [PATCH 1/2] docs: Update `group_by_dynamic` example

---
 .../transformations/time-series/rolling.py       | 16 +++++-----------
 .../transformations/time-series/rolling.rs       |  1 -
 2 files changed, 5 insertions(+), 12 deletions(-)

diff --git a/docs/src/python/user-guide/transformations/time-series/rolling.py b/docs/src/python/user-guide/transformations/time-series/rolling.py
index 16f751523ade..f41d2a48c05e 100644
--- a/docs/src/python/user-guide/transformations/time-series/rolling.py
+++ b/docs/src/python/user-guide/transformations/time-series/rolling.py
@@ -29,17 +29,11 @@
     .to_frame()
 )
 
-out = (
-    df.group_by_dynamic("time", every="1mo", period="1mo", closed="left")
-    .agg(
-        [
-            pl.col("time").cumcount().reverse().head(3).alias("day/eom"),
-            ((pl.col("time") - pl.col("time").first()).last().dt.days() + 1).alias(
-                "days_in_month"
-            ),
-        ]
-    )
-    .explode("day/eom")
+out = df.group_by_dynamic("time", every="1mo", period="1mo", closed="left").agg(
+    pl.col("time").cumcount().reverse().head(3).alias("day/eom"),
+    ((pl.col("time") - pl.col("time").first()).last().dt.days() + 1).alias(
+        "days_in_month"
+    ),
 )
 print(out)
 # --8<-- [end:group_by_dyn]
diff --git a/docs/src/rust/user-guide/transformations/time-series/rolling.rs b/docs/src/rust/user-guide/transformations/time-series/rolling.rs
index 6458eb69bdfc..0528d536d718 100644
--- a/docs/src/rust/user-guide/transformations/time-series/rolling.rs
+++ b/docs/src/rust/user-guide/transformations/time-series/rolling.rs
@@ -86,7 +86,6 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
             ) + lit(1))
             .alias("days_in_month"),
         ])
-        .explode([col("day/eom")])
         .collect()?;
     println!("{}", &out);
     // --8<-- [end:group_by_dyn]

From 041f747b14359171a17fcdee9aae4b50ba79c166 Mon Sep 17 00:00:00 2001
From: Stijn de Gooijer <stijn@degooijer.io>
Date: Sat, 14 Oct 2023 20:06:59 +0200
Subject: [PATCH 2/2] Add cot docs

---
 py-polars/docs/source/reference/expressions/computation.rst | 1 +
 py-polars/docs/source/reference/series/computation.rst      | 1 +
 2 files changed, 2 insertions(+)

diff --git a/py-polars/docs/source/reference/expressions/computation.rst b/py-polars/docs/source/reference/expressions/computation.rst
index 298631c7dfdf..464163406b80 100644
--- a/py-polars/docs/source/reference/expressions/computation.rst
+++ b/py-polars/docs/source/reference/expressions/computation.rst
@@ -18,6 +18,7 @@ Computation
     Expr.cbrt
     Expr.cos
     Expr.cosh
+    Expr.cot
     Expr.cumcount
     Expr.cummax
     Expr.cummin
diff --git a/py-polars/docs/source/reference/series/computation.rst b/py-polars/docs/source/reference/series/computation.rst
index 776fcf510f84..4757fc761661 100644
--- a/py-polars/docs/source/reference/series/computation.rst
+++ b/py-polars/docs/source/reference/series/computation.rst
@@ -18,6 +18,7 @@ Computation
     Series.cbrt
     Series.cos
     Series.cosh
+    Series.cot
     Series.cummax
     Series.cummin
     Series.cumprod