cleanup import route

Author: TomAugspurger

pandas/plotting/_core.py

@@ -5,19 +5,16 @@
 from pandas.core.dtypes.common import is_integer, is_list_like
 from pandas.core.dtypes.generic import ABCDataFrame, ABCSeries
 
-import pandas
 from pandas.core.base import PandasObject
 from pandas.core.generic import _shared_doc_kwargs, _shared_docs
 
-# Automatically registering converters was deprecated in 0.21, but
-# the deprecation warning wasn't showing until 0.24
-# This block will be eventually removed, but it's not clear when
-if pandas.get_option('plotting.matplotlib.register_converters'):
-    try:
-        from ._misc import register
-        register(explicit=False)
-    except ImportError:
-        pass
+# Trigger matplotlib import, which implicitly registers our
+# converts. Implicit registration is deprecated, and when enforced
+# we can lazily import matplotlib.
+try:
+    import pandas.plotting._matplotlib  # noqa
+except ImportError:
+    pass
 
 df_kind = """- 'scatter' : scatter plot
         - 'hexbin' : hexbin plot"""

pandas/plotting/_matplotlib/__init__.py

@@ -1,3 +1,5 @@
+from pandas._config import get_option
+
 from pandas.plotting._matplotlib.boxplot import (
     BoxPlot, boxplot, boxplot_frame, boxplot_frame_groupby)
 from pandas.plotting._matplotlib.converter import deregister, register
@@ -11,6 +13,10 @@
 from pandas.plotting._matplotlib.timeseries import tsplot
 from pandas.plotting._matplotlib.tools import table
 
+if get_option("plotting.matplotlib.register_converters"):
+    register(explicit=False)
+
+
 __all__ = ['LinePlot', 'BarPlot', 'BarhPlot', 'HistPlot', 'BoxPlot', 'KdePlot',
            'AreaPlot', 'PiePlot', 'ScatterPlot', 'HexBinPlot', 'hist_series',
            'hist_frame', 'boxplot', 'boxplot_frame', 'boxplot_frame_groupby',