dchvn commented on a change in pull request #34251:
URL: https://github.com/apache/spark/pull/34251#discussion_r727682086



##########
File path: python/pyspark/pandas/plot/core.py
##########
@@ -98,25 +98,29 @@ def set_result_text(self, ax):
             )
 
 
-class HistogramPlotBase:
-    @staticmethod
-    def prepare_hist_data(data, bins):
-        # TODO: this logic is similar with KdePlotBase. Might have to 
deduplicate it.
-        from pyspark.pandas.series import Series
+def _prepare_numeric_data(data):

Review comment:
       Thanks, I will update this PR soon.
   Can I ask a question? Why can ```python/pyspark/pandas/plot/core.py```  pass 
```mypy check``` without type hint ? 

##########
File path: python/pyspark/pandas/plot/core.py
##########
@@ -98,25 +98,29 @@ def set_result_text(self, ax):
             )
 
 
-class HistogramPlotBase:
-    @staticmethod
-    def prepare_hist_data(data, bins):
-        # TODO: this logic is similar with KdePlotBase. Might have to 
deduplicate it.
-        from pyspark.pandas.series import Series
+def _prepare_numeric_data(data):

Review comment:
       Oh, it ignore in ```python/mypy.ini```

##########
File path: python/pyspark/pandas/plot/core.py
##########
@@ -98,25 +98,29 @@ def set_result_text(self, ax):
             )
 
 
-class HistogramPlotBase:
-    @staticmethod
-    def prepare_hist_data(data, bins):
-        # TODO: this logic is similar with KdePlotBase. Might have to 
deduplicate it.
-        from pyspark.pandas.series import Series
+def _prepare_numeric_data(data):

Review comment:
       > Can we create a class called `NumericPlotBase` and define this method, 
and let `HistogramPlotBase` and `KdePlotBase` inherit it?
   
   Updated, thanks!




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