frame._data deprecated in pandas, see pandas-dev/pandas#52003.

Author: j-bennet

dask/base.py

@@ -1098,6 +1098,8 @@ def normalize_dataclass(obj):
 def register_pandas():
     import pandas as pd
 
+    pandas_version = parse_version(pd.__version__)
+
     @normalize_token.register(pd.Index)
     def normalize_index(ind):
         values = ind.array
@@ -1141,7 +1143,7 @@ def normalize_series(s):
 
     @normalize_token.register(pd.DataFrame)
     def normalize_dataframe(df):
-        mgr = df._data
+        mgr = df._mgr if pandas_version.major >= 2 else df._data
 
         data = list(mgr.arrays) + [df.columns, df.index]
         return list(map(normalize_token, data))