FIX: ensure that used sub-packages are actually imported

tacaswell · tacaswell · commit 87043459bcaa · 2022-01-24T15:14:04.000-05:00
closes #22305
diff --git a/lib/matplotlib/ticker.py b/lib/matplotlib/ticker.py
@@ -134,6 +134,7 @@
 import matplotlib as mpl
 from matplotlib import _api, cbook
 from matplotlib import transforms as mtransforms
+import matplotlib.font_manager as mfont_manager
 
 _log = logging.getLogger(__name__)
 
@@ -441,8 +442,8 @@ def __init__(self, useOffset=None, useMathText=None, useLocale=None):
             useMathText = mpl.rcParams['axes.formatter.use_mathtext']
             if useMathText is False:
                 try:
-                    ufont = mpl.font_manager.findfont(
-                        mpl.font_manager.FontProperties(
+                    ufont = mfont_manager.findfont(
+                        mfont_manager.FontProperties(
                             mpl.rcParams["font.family"]
                         ),
                         fallback_to_default=False,
