From d68e899798ac3ca8dcb2b4185362aecbc3ec800e Mon Sep 17 00:00:00 2001
From: Angus McBride <git@zog.mozmail.com>
Date: Tue, 23 Dec 2025 12:25:44 +0100
Subject: [PATCH] Warn on failing imports

---
 epyt/epanet.py | 22 +++++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)

diff --git a/epyt/epanet.py b/epyt/epanet.py
index 6df2908..e1ba91d 100644
--- a/epyt/epanet.py
+++ b/epyt/epanet.py
@@ -83,11 +83,23 @@
 from shutil import copyfile
 from types import SimpleNamespace
 
-import matplotlib as mpl
-import matplotlib.pyplot as plt
-import numpy as np
-import pandas as pd
-from matplotlib import cm
+
+try:
+    import matplotlib as mpl
+    import matplotlib.pyplot as plt
+    from matplotlib import cm
+except ImportError:
+    warnings.warn("matplotlib is not installed. Plotting functions will not work.")
+
+try:
+    import numpy as np
+except ImportError:
+    warnings.warn("numpy is not installed. Some functions will not work.")
+
+try:
+    import pandas as pd
+except ImportError:
+    warnings.warn("pandas is not installed. Excel functions will not work.")
 
 epyt_root = str(files("epyt"))