diff --git a/bloaty/bloaty_merger.py b/bloaty/bloaty_merger.py
index 1034462..46ce57f 100644
--- a/bloaty/bloaty_merger.py
+++ b/bloaty/bloaty_merger.py
@@ -24,58 +24,63 @@
 import csv
 import gzip
 
+# pylint: disable=import-error
 import ninja_rsp
 
 import file_sections_pb2
 
 BLOATY_EXTENSION = ".bloaty.csv"
 
+
 def parse_csv(path):
-  """Parses a Bloaty-generated CSV file into a protobuf.
+    """Parses a Bloaty-generated CSV file into a protobuf.
 
-  Args:
-    path: The filepath to the CSV file, relative to $ANDROID_TOP.
+    Args:
+      path: The filepath to the CSV file, relative to $ANDROID_TOP.
 
-  Returns:
-    A file_sections_pb2.File if the file was found; None otherwise.
-  """
-  file_proto = None
-  with open(path, newline='') as csv_file:
-    file_proto = file_sections_pb2.File()
-    if path.endswith(BLOATY_EXTENSION):
-      file_proto.path = path[:-len(BLOATY_EXTENSION)]
-    section_reader = csv.DictReader(csv_file)
-    for row in section_reader:
-      section = file_proto.sections.add()
-      section.name = row["sections"]
-      section.vm_size = int(row["vmsize"])
-      section.file_size = int(row["filesize"])
-  return file_proto
+    Returns:
+      A file_sections_pb2.File if the file was found; None otherwise.
+    """
+    file_proto = None
+    with open(path, newline='') as csv_file:
+        file_proto = file_sections_pb2.File()
+        if path.endswith(BLOATY_EXTENSION):
+            file_proto.path = path[: -len(BLOATY_EXTENSION)]
+        section_reader = csv.DictReader(csv_file)
+        for row in section_reader:
+            section = file_proto.sections.add()
+            section.name = row["sections"]
+            section.vm_size = int(row["vmsize"])
+            section.file_size = int(row["filesize"])
+    return file_proto
+
 
 def create_file_size_metrics(input_list, output_proto):
-  """Creates a FileSizeMetrics proto from a list of CSV files.
+    """Creates a FileSizeMetrics proto from a list of CSV files.
 
-  Args:
-    input_list: The path to the file which contains the list of CSV files. Each
-        filepath is separated by a space.
-    output_proto: The path for the output protobuf. It will be compressed using
-        gzip.
-  """
-  metrics = file_sections_pb2.FileSizeMetrics()
-  reader = ninja_rsp.NinjaRspFileReader(input_list)
-  for csv_path in reader:
-    file_proto = parse_csv(csv_path)
-    if file_proto:
-      metrics.files.append(file_proto)
-  with gzip.open(output_proto, "wb") as output:
-    output.write(metrics.SerializeToString())
+    Args:
+      input_list: The path to the file which contains the list of CSV files.
+          Each filepath is separated by a space.
+      output_proto: The path for the output protobuf. It will be compressed
+          using gzip.
+    """
+    metrics = file_sections_pb2.FileSizeMetrics()
+    reader = ninja_rsp.NinjaRspFileReader(input_list)
+    for csv_path in reader:
+        file_proto = parse_csv(csv_path)
+        if file_proto:
+            metrics.files.append(file_proto)
+    with gzip.open(output_proto, "wb") as output:
+        output.write(metrics.SerializeToString())
+
 
 def main():
-  parser = argparse.ArgumentParser()
-  parser.add_argument("input_list_file", help="List of bloaty csv files.")
-  parser.add_argument("output_proto", help="Output proto.")
-  args = parser.parse_args()
-  create_file_size_metrics(args.input_list_file, args.output_proto)
+    parser = argparse.ArgumentParser()
+    parser.add_argument("input_list_file", help="List of bloaty csv files.")
+    parser.add_argument("output_proto", help="Output proto.")
+    args = parser.parse_args()
+    create_file_size_metrics(args.input_list_file, args.output_proto)
+
 
 if __name__ == '__main__':
-  main()
+    main()
diff --git a/bloaty/bloaty_merger_test.py b/bloaty/bloaty_merger_test.py
index 9de049a..83680b9 100644
--- a/bloaty/bloaty_merger_test.py
+++ b/bloaty/bloaty_merger_test.py
@@ -14,6 +14,7 @@
 import gzip
 import unittest
 
+# pylint: disable=import-error
 from pyfakefs import fake_filesystem_unittest
 
 import bloaty_merger
@@ -21,46 +22,46 @@
 
 
 class BloatyMergerTestCase(fake_filesystem_unittest.TestCase):
-  def setUp(self):
-    self.setUpPyfakefs()
+    def setUp(self):
+        self.setUpPyfakefs()
 
-  def test_parse_csv(self):
-    csv_content = "sections,vmsize,filesize\nsection1,2,3\n"
-    self.fs.create_file("file1.bloaty.csv", contents=csv_content)
-    pb = bloaty_merger.parse_csv("file1.bloaty.csv")
-    self.assertEqual(pb.path, "file1")
-    self.assertEqual(len(pb.sections), 1)
-    s = pb.sections[0]
-    self.assertEqual(s.name, "section1")
-    self.assertEqual(s.vm_size, 2)
-    self.assertEqual(s.file_size, 3)
+    def test_parse_csv(self):
+        csv_content = "sections,vmsize,filesize\nsection1,2,3\n"
+        self.fs.create_file("file1.bloaty.csv", contents=csv_content)
+        pb = bloaty_merger.parse_csv("file1.bloaty.csv")
+        self.assertEqual(pb.path, "file1")
+        self.assertEqual(len(pb.sections), 1)
+        s = pb.sections[0]
+        self.assertEqual(s.name, "section1")
+        self.assertEqual(s.vm_size, 2)
+        self.assertEqual(s.file_size, 3)
 
-  def test_missing_file(self):
-    with self.assertRaises(FileNotFoundError):
-      bloaty_merger.parse_csv("missing.bloaty.csv")
+    def test_missing_file(self):
+        with self.assertRaises(FileNotFoundError):
+            bloaty_merger.parse_csv("missing.bloaty.csv")
 
-  def test_malformed_csv(self):
-    csv_content = "header1,heaVder2,header3\n4,5,6\n"
-    self.fs.create_file("file1.bloaty.csv", contents=csv_content)
-    with self.assertRaises(KeyError):
-      bloaty_merger.parse_csv("file1.bloaty.csv")
+    def test_malformed_csv(self):
+        csv_content = "header1,heaVder2,header3\n4,5,6\n"
+        self.fs.create_file("file1.bloaty.csv", contents=csv_content)
+        with self.assertRaises(KeyError):
+            bloaty_merger.parse_csv("file1.bloaty.csv")
 
-  def test_create_file_metrics(self):
-    file_list = "file1.bloaty.csv file2.bloaty.csv"
-    file1_content = "sections,vmsize,filesize\nsection1,2,3\nsection2,7,8"
-    file2_content = "sections,vmsize,filesize\nsection1,4,5\n"
+    def test_create_file_metrics(self):
+        file_list = "file1.bloaty.csv file2.bloaty.csv"
+        file1_content = "sections,vmsize,filesize\nsection1,2,3\nsection2,7,8"
+        file2_content = "sections,vmsize,filesize\nsection1,4,5\n"
 
-    self.fs.create_file("files.lst", contents=file_list)
-    self.fs.create_file("file1.bloaty.csv", contents=file1_content)
-    self.fs.create_file("file2.bloaty.csv", contents=file2_content)
+        self.fs.create_file("files.lst", contents=file_list)
+        self.fs.create_file("file1.bloaty.csv", contents=file1_content)
+        self.fs.create_file("file2.bloaty.csv", contents=file2_content)
 
-    bloaty_merger.create_file_size_metrics("files.lst", "output.pb.gz")
+        bloaty_merger.create_file_size_metrics("files.lst", "output.pb.gz")
 
-    metrics = file_sections_pb2.FileSizeMetrics()
-    with gzip.open("output.pb.gz", "rb") as output:
-      metrics.ParseFromString(output.read())
+        metrics = file_sections_pb2.FileSizeMetrics()
+        with gzip.open("output.pb.gz", "rb") as output:
+            metrics.ParseFromString(output.read())
 
 
 if __name__ == '__main__':
-  suite = unittest.TestLoader().loadTestsFromTestCase(BloatyMergerTestCase)
-  unittest.TextTestRunner(verbosity=2).run(suite)
+    suite = unittest.TestLoader().loadTestsFromTestCase(BloatyMergerTestCase)
+    unittest.TextTestRunner(verbosity=2).run(suite)