From 685a83c471a729562bc421e0a1b7f363aaa3237a Mon Sep 17 00:00:00 2001
From: Tobias Preis <tobias.preis@uibk.ac.at>
Date: Mon, 8 Jun 2026 09:35:44 +0200
Subject: [PATCH] Refactor deprecated numpy.core.defchararray methods

---
 fermipy/catalog.py | 2 +-
 fermipy/utils.py   | 4 +---
 2 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/fermipy/catalog.py b/fermipy/catalog.py
index 8d974ef9..ea88333a 100644
--- a/fermipy/catalog.py
+++ b/fermipy/catalog.py
@@ -77,7 +77,7 @@ def strip_columns(tab):
     """Strip whitespace from string columns."""
     for colname in tab.colnames:
         if tab[colname].dtype.kind in ['S', 'U']:
-            tab[colname] = np.core.defchararray.strip(tab[colname])
+            tab[colname] = np.char.strip(tab[colname])
 
 
 def row_to_dict(row):
diff --git a/fermipy/utils.py b/fermipy/utils.py
index 77092758..0583e554 100644
--- a/fermipy/utils.py
+++ b/fermipy/utils.py
@@ -15,7 +15,6 @@
 from scipy.optimize import brentq
 from scipy.ndimage import label
 import scipy.special as special
-from numpy.core import defchararray
 from numpy.polynomial.polynomial import polyfit
 try:
     from astropy.extern import six
@@ -239,8 +238,7 @@ def find_rows_by_string(tab, names, colnames=['assoc']):
             continue
 
         col = tab[[colname]].copy()
-        col[colname] = defchararray.replace(defchararray.lower(col[colname]).astype(str),
-                                        ' ', '')
+        col[colname] = np.char.replace(np.char.lower(col[colname]).astype(str),' ', '')
         for name in names:
             mask |= col[colname] == name
     return mask