diff --git a/parsedmarc/s3.py b/parsedmarc/s3.py
index 8f64aa0..41910ed 100644
--- a/parsedmarc/s3.py
+++ b/parsedmarc/s3.py
@@ -28,23 +28,23 @@ class S3Client(object):
             "begin_date",
             "end_date",
         ]
-        
+
         self.s3 = boto3.resource('s3')
         self.bucket = self.s3.Bucket(self.bucket_name)
 
-
     def save_aggregate_report_to_s3(self, report):
         self.save_report_to_s3(report, 'aggregate')
 
-
     def save_forensic_report_to_s3(self, report):
         self.save_report_to_s3(report, 'forensic')
 
-
     def save_report_to_s3(self, report, report_type):
-        report_date = human_timestamp_to_datetime(report["report_metadata"]["begin_date"])
+        report_date = human_timestamp_to_datetime(
+            report["report_metadata"]["begin_date"]
+        )
         report_id = report["report_metadata"]["report_id"]
-        object_path = "{0}/{1}/year={2}/month={3:02d}/day={4:02d}/{5}.json".format(
+        path_template = "{0}/{1}/year={2}/month={3:02d}/day={4:02d}/{5}.json"
+        object_path = path_template.format(
             self.bucket_path,
             report_type,
             report_date.year,
@@ -52,7 +52,10 @@ class S3Client(object):
             report_date.day,
             report_id
         )
-        logger.debug("Saving {0} report to s3://{1}/{2}".format(report_type, self.bucket_name, object_path))
+        logger.debug("Saving {0} report to s3://{1}/{2}".format(
+            report_type,
+            self.bucket_name,
+            object_path))
         object_metadata = {
             k: v
             for k, v in report["report_metadata"].items()