From 4fe2ab215f8689302f4aa2dc3f5f07717cd5f247 Mon Sep 17 00:00:00 2001
From: Matthew Roeschke <10647082+mroeschke@users.noreply.github.com>
Date: Tue, 2 Jul 2024 09:13:04 -0700
Subject: [PATCH 1/2] TST: Address UserWarning in matplotlib test

---
 pandas/plotting/_matplotlib/core.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pandas/plotting/_matplotlib/core.py b/pandas/plotting/_matplotlib/core.py
index 22be9baf1ff5c..23bfdb5a131e2 100644
--- a/pandas/plotting/_matplotlib/core.py
+++ b/pandas/plotting/_matplotlib/core.py
@@ -892,7 +892,7 @@ def _make_legend(self) -> None:
 
         elif self.subplots and self.legend:
             for ax in self.axes:
-                if ax.get_visible():
+                if ax.get_visible() and ax.get_label():
                     ax.legend(loc="best")
 
     @final

From 45741daf7ff2f5e5db9874d9b11162621d24bb3e Mon Sep 17 00:00:00 2001
From: Matthew Roeschke <10647082+mroeschke@users.noreply.github.com>
Date: Tue, 2 Jul 2024 13:09:27 -0700
Subject: [PATCH 2/2] Filter the warning instead

---
 pandas/plotting/_matplotlib/core.py | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/pandas/plotting/_matplotlib/core.py b/pandas/plotting/_matplotlib/core.py
index 23bfdb5a131e2..8b108346160d6 100644
--- a/pandas/plotting/_matplotlib/core.py
+++ b/pandas/plotting/_matplotlib/core.py
@@ -892,8 +892,14 @@ def _make_legend(self) -> None:
 
         elif self.subplots and self.legend:
             for ax in self.axes:
-                if ax.get_visible() and ax.get_label():
-                    ax.legend(loc="best")
+                if ax.get_visible():
+                    with warnings.catch_warnings():
+                        warnings.filterwarnings(
+                            "ignore",
+                            "No artists with labels found to put in legend.",
+                            UserWarning,
+                        )
+                        ax.legend(loc="best")
 
     @final
     @staticmethod