Dedupe seaborn styles.

lib/matplotlib/mpl-data/stylelib/_seaborn-v0_8-common.py

@@ -0,0 +1,21 @@
+{
+    "figure.facecolor": "white",
+    "text.color": "0.15",
+    "axes.labelcolor": "0.15",
+    "legend.frameon": False,
+    "legend.numpoints": 1,
+    "legend.scatterpoints": 1,
+    "xtick.direction": "out",
+    "ytick.direction": "out",
+    "xtick.color": "0.15",
+    "ytick.color": "0.15",
+    "axes.axisbelow": True,
+    "image.cmap": "Greys",
+    "font.family": "sans-serif",
+    "font.sans-serif": [
+        "Arial", "Liberation Sans", "DejaVu Sans", "Bitstream Vera Sans",
+        "sans-serif",
+    ],
+    "grid.linestyle": "-",
+    "lines.solid_capstyle": "round"
+}

lib/matplotlib/mpl-data/stylelib/seaborn-v0_8-dark.py

@@ -0,0 +1,16 @@
+import ast
+from pathlib import Path
+
+
+__mpl_style__ = {
+    **ast.literal_eval(Path(__file__).with_name("_seaborn-v0_8-common.py").read_text()),
+    "axes.grid": False,
+    "axes.facecolor": "#EAEAF2",
+    "axes.edgecolor": "white",
+    "axes.linewidth": 0,
+    "grid.color": "white",
+    "xtick.major.size": 0,
+    "ytick.major.size": 0,
+    "xtick.minor.size": 0,
+    "ytick.minor.size": 0,
+}

lib/matplotlib/mpl-data/stylelib/seaborn-v0_8-darkgrid.py

@@ -0,0 +1,16 @@
+import ast
+from pathlib import Path
+
+
+__mpl_style__ = {
+    **ast.literal_eval(Path(__file__).with_name("_seaborn-v0_8-common.py").read_text()),
+    "axes.grid": True,
+    "axes.facecolor": "#EAEAF2",
+    "axes.edgecolor": "white",
+    "axes.linewidth": 0,
+    "grid.color": "white",
+    "xtick.major.size": 0,
+    "ytick.major.size": 0,
+    "xtick.minor.size": 0,
+    "ytick.minor.size": 0,
+}

lib/matplotlib/mpl-data/stylelib/seaborn-v0_8-ticks.py

@@ -0,0 +1,16 @@
+import ast
+from pathlib import Path
+
+
+__mpl_style__ = {
+    **ast.literal_eval(Path(__file__).with_name("_seaborn-v0_8-common.py").read_text()),
+    "axes.grid": False,
+    "axes.facecolor": "white",
+    "axes.edgecolor": ".15",
+    "axes.linewidth": 1.25,
+    "grid.color": ".8",
+    "xtick.major.size": 6,
+    "ytick.major.size": 6,
+    "xtick.minor.size": 3,
+    "ytick.minor.size": 3,
+}

lib/matplotlib/mpl-data/stylelib/seaborn-v0_8-white.py

@@ -0,0 +1,17 @@
+
+import ast
+from pathlib import Path
+
+
+__mpl_style__ = {
+    **ast.literal_eval(Path(__file__).with_name("_seaborn-v0_8-common.py").read_text()),
+    "axes.grid": False,
+    "axes.facecolor": "white",
+    "axes.edgecolor": ".15",
+    "axes.linewidth": 1.25,
+    "grid.color": ".8",
+    "xtick.major.size": 0,
+    "ytick.major.size": 0,
+    "xtick.minor.size": 0,
+    "ytick.minor.size": 0,
+}

lib/matplotlib/mpl-data/stylelib/seaborn-v0_8-whitegrid.py

@@ -0,0 +1,16 @@
+import ast
+from pathlib import Path
+
+
+__mpl_style__ = {
+    **ast.literal_eval(Path(__file__).with_name("_seaborn-v0_8-common.py").read_text()),
+    "axes.grid": True,
+    "axes.facecolor": "white",
+    "axes.edgecolor": ".8",
+    "axes.linewidth": 1,
+    "grid.color": ".8",
+    "xtick.major.size": 0,
+    "ytick.major.size": 0,
+    "xtick.minor.size": 0,
+    "ytick.minor.size": 0,
+}

lib/matplotlib/style/core.py

@@ -223,12 +223,14 @@ def _read_pystyle_base_directory():
     used internally to load files provided by Matplotlib itself, not
     user-provided style files.
 
-    A Python style is a Python module that exports a dict named
+    A Python style is a non-private Python module that exports a dict named
     ``__mpl_style__``, from which a `RcParams` is constructed.  This convention
     may be revisited if this feature ever becomes public.
     """
     styles = {}
     for path in Path(BASE_LIBRARY_PATH).glob("*.py"):
+        if path.name.startswith("_"):
+            continue
         spec = importlib.util.spec_from_file_location(path.stem, path)
         module = importlib.util.module_from_spec(spec)
         spec.loader.exec_module(module)