ENH: Improve plotting types (#278)

* ENH: Improve plotting types

Add types for many inputs
Clean out non-public functions

* TST: Add tests for plotting

Add tests
Correct types

* ENH: Improve types for plot()

Add covered types in docs
Add tests

* TYP: Correct int -> float

Author: bashtage

pandas-stubs/core/frame.pyi

@@ -1216,7 +1216,7 @@ class DataFrame(NDFrame, OpsMixin):
         by: _str | ListLike | None = ...,
         ax: PlotAxes | None = ...,
         fontsize: float | _str | None = ...,
-        rot: int = ...,
+        rot: float = ...,
         grid: _bool = ...,
         figsize: tuple[float, float] | None = ...,
         layout: tuple[int, int] | None = ...,

pandas-stubs/core/groupby/generic.pyi

@@ -171,7 +171,7 @@ class DataFrameGroupBy(GroupBy):
         grouped: DataFrame,
         subplots: bool = ...,
         column: str | Sequence | None = ...,
-        fontsize: int | str = ...,
+        fontsize: float | str = ...,
         rot: float = ...,
         grid: bool = ...,
         ax: PlotAxes | None = ...,

pandas-stubs/plotting/__init__.pyi

@@ -1,21 +1,20 @@
-from ._core import (
+from pandas.plotting._core import (
     PlotAccessor as PlotAccessor,
     boxplot as boxplot,
-    boxplot_frame as boxplot_frame,
-    boxplot_frame_groupby as boxplot_frame_groupby,
-    hist_frame as hist_frame,
-    hist_series as hist_series,
 )
-from ._misc import (
+from pandas.plotting._misc import (
     andrews_curves as andrews_curves,
     autocorrelation_plot as autocorrelation_plot,
     bootstrap_plot as bootstrap_plot,
-    deregister as deregister_matplotlib_converters,
+    deregister,
     lag_plot as lag_plot,
     parallel_coordinates as parallel_coordinates,
     plot_params as plot_params,
     radviz as radviz,
-    register as register_matplotlib_converters,
+    register,
     scatter_matrix as scatter_matrix,
     table as table,
 )
+
+deregister_matplotlib_converters = deregister
+register_matplotlib_converters = register