CLN: replace %s syntax with .format in pandas.io (#24719)

progress towards #16130
pandas-dev · Jan 11, 2019 · 3fe28fc · 3fe28fc
1 parent e2b2068
commit 3fe28fc
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diff --git a/pandas/io/packers.py b/pandas/io/packers.py
@@ -519,7 +519,8 @@ def encode(obj):
         elif isinstance(obj, date):
             return {u'typ': u'date',
                     u'data': u(obj.isoformat())}
-        raise Exception("cannot encode this datetimelike object: %s" % obj)
+        raise Exception(
+            "cannot encode this datetimelike object: {obj}".format(obj=obj))
     elif isinstance(obj, Period):
         return {u'typ': u'period',
                 u'ordinal': obj.ordinal,