Fix style issues

Author: jbman223

pandas/core/internals/blocks.py

@@ -660,7 +660,7 @@ def to_native_types(self, slicer=None, na_rep="nan", quoting=None, **kwargs):
             try:
                 itemsize = writers.word_len(na_rep)
                 values = values.astype("<U{size}".format(size=itemsize))
-            except:
+            except Exception:
                 values = np.array(values, dtype="object")
         else:
             values = np.array(values, dtype="object")