diff --git a/lib/matplotlib/axes/_axes.py b/lib/matplotlib/axes/_axes.py
index 66af3dd8038c..b55d4a1199e6 100644
--- a/lib/matplotlib/axes/_axes.py
+++ b/lib/matplotlib/axes/_axes.py
@@ -2881,50 +2881,18 @@ def stem(self, *args, linefmt=None, markerfmt=None, basefmt=None, bottom=0,
# defaults for formats
if linefmt is None:
- try:
- # fallback to positional argument
- linefmt = args[0]
- except IndexError:
- linecolor = 'C0'
- linemarker = 'None'
- linestyle = '-'
- else:
- linestyle, linemarker, linecolor = \
- _process_plot_format(linefmt)
- else:
- linestyle, linemarker, linecolor = _process_plot_format(linefmt)
+ linefmt = args[0] if len(args) > 0 else "C0-"
+ linestyle, linemarker, linecolor = _process_plot_format(linefmt)
if markerfmt is None:
- try:
- # fallback to positional argument
- markerfmt = args[1]
- except IndexError:
- markercolor = 'C0'
- markermarker = 'o'
- markerstyle = 'None'
- else:
- markerstyle, markermarker, markercolor = \
- _process_plot_format(markerfmt)
- else:
- markerstyle, markermarker, markercolor = \
- _process_plot_format(markerfmt)
+ markerfmt = args[1] if len(args) > 1 else "C0o"
+ markerstyle, markermarker, markercolor = \
+ _process_plot_format(markerfmt)
if basefmt is None:
- try:
- # fallback to positional argument
- basefmt = args[2]
- except IndexError:
- if rcParams['_internal.classic_mode']:
- basecolor = 'C2'
- else:
- basecolor = 'C3'
- basemarker = 'None'
- basestyle = '-'
- else:
- basestyle, basemarker, basecolor = \
- _process_plot_format(basefmt)
- else:
- basestyle, basemarker, basecolor = _process_plot_format(basefmt)
+ basefmt = (args[2] if len(args) > 2 else
+ "C2-" if rcParams["_internal.classic_mode"] else "C3-")
+ basestyle, basemarker, basecolor = _process_plot_format(basefmt)
# New behaviour in 3.1 is to use a LineCollection for the stemlines
if use_line_collection:
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