fix hashing benchmarks

Author: jorisvandenbossche

asv_bench/benchmarks/algorithms.py

@@ -2,6 +2,11 @@
 import pandas as pd
 from pandas.util import testing as tm
 
+try:
+    from pandas.tools.hashing import hash_pandas_object
+except ImportError:
+    pass
+
 
 class Algorithms(object):
     goal_time = 0.2
@@ -103,13 +108,13 @@ def setup(self):
         self.df.iloc[10:20] = np.nan
 
     def time_frame(self):
-        self.df.hash()
+        hash_pandas_object(self.df)
 
     def time_series_int(self):
-        self.df.E.hash()
+        hash_pandas_object(self.df.E)
 
     def time_series_string(self):
-        self.df.B.hash()
+        hash_pandas_object(self.df.B)
 
     def time_series_categorical(self):
-        self.df.C.hash()
+        hash_pandas_object(self.df.C)