ENH: Fix DataFrame._data deprecated warnings

CI/test_basic_execution.py

@@ -7,10 +7,9 @@
 
 
 def test_basic_cases():
-    with warnings.catch_warnings():
-        # TODO: change warnings.simplefilter("error") to "module"
+    with warnings.catch_warnings():        
         # "error" help us find the deprecated APIs
-        warnings.simplefilter("module")
+        warnings.simplefilter("error")
         import xorbits
         import xorbits.pandas as pd
         import xorbits.numpy as np

python/xorbits/_mars/_utils.pyx

@@ -201,7 +201,7 @@ cdef list tokenize_pandas_series(ob):
 
 
 cdef list tokenize_pandas_dataframe(ob):
-    l = [block.values for block in ob._data.blocks]
+    l = [block.values for block in ob._mgr.blocks]
     l.extend([ob.columns, ob.index])
     return iterative_tokenize(l)