Merge pull request matplotlib#29053 from anntzer/lf

Factor out common formats strings in LogFormatter, LogFormatterExponent.

Author: QuLogic

lib/matplotlib/ticker.py

@@ -1001,13 +1001,7 @@ def set_locs(self, locs=None):
             self._sublabels = set(np.arange(1, b + 1))
 
     def _num_to_string(self, x, vmin, vmax):
-        if x > 10000:
-            s = '%1.0e' % x
-        elif x < 1:
-            s = '%1.0e' % x
-        else:
-            s = self._pprint_val(x, vmax - vmin)
-        return s
+        return self._pprint_val(x, vmax - vmin) if 1 <= x <= 10000 else f"{x:1.0e}"
 
     def __call__(self, x, pos=None):
         # docstring inherited
@@ -1067,15 +1061,14 @@ class LogFormatterExponent(LogFormatter):
     """
     Format values for log axis using ``exponent = log_base(value)``.
     """
+
     def _num_to_string(self, x, vmin, vmax):
         fx = math.log(x) / math.log(self._base)
-        if abs(fx) > 10000:
-            s = '%1.0g' % fx
-        elif abs(fx) < 1:
-            s = '%1.0g' % fx
-        else:
+        if 1 <= abs(fx) <= 10000:
             fd = math.log(vmax - vmin) / math.log(self._base)
             s = self._pprint_val(fx, fd)
+        else:
+            s = f"{fx:1.0g}"
         return s