update code sample for pandas-dev#37415

Author: simonjayhawkins

bisect/37415.py

@@ -2,5 +2,10 @@
 print(pd.__version__)
 df = pd.DataFrame({'a': [1, 1, 1, 2, 2], 'b': [1, 2, 3, 4, 5]})
 df['b'] = df['b'].astype(pd.Int32Dtype())
-res = df.groupby('a').agg('std')
-print(res)
+try:
+    res = df.groupby('a').agg('std')
+except TypeError:
+    # 1.0.0rc raised TypeError: cannot safely cast non-equivalent float64 to int32)
+    pass
+else:
+    print(res)