Adjust backend coding style

Add line spacing, section comments, and import consistency

6 files changed, 33 insertions, 6 deletions

diff --git a/backend/tests/enwiki/test_download_img_license_info.py b/backend/tests/enwiki/test_download_img_license_info.py
index ed6e426..bd91478 100644
--- a/backend/tests/enwiki/test_download_img_license_info.py
+++ b/backend/tests/enwiki/test_download_img_license_info.py
@@ -1,6 +1,7 @@
 import unittest
 from unittest.mock import Mock, patch
-import tempfile, os
+import tempfile
+import os
 
 from tests.common import createTestDbTable, readTestDbTable
 from tol_data.enwiki.download_img_license_info import downloadInfo
@@ -53,6 +54,7 @@ TEST_RESPONSE1 = {
     }
   }
 }
+
 TEST_RESPONSE2 = {
   'batchcomplete': '',
   'query': {
@@ -152,8 +154,10 @@ class TestDownloadInfo(unittest.TestCase):
 					(1, 'Octopus2.jpg'),
 				}
 			)
+
 			# Run
 			downloadInfo(imgDb)
+
 			# Check
 			self.assertEqual(
 				readTestDbTable(imgDb, 'SELECT name, license, artist, credit, restrictions, url from imgs'),
@@ -162,6 +166,7 @@ class TestDownloadInfo(unittest.TestCase):
 						'https://upload.wikimedia.org/wikipedia/commons/5/57/Octopus2.jpg'),
 				}
 			)
+
 			# Run with updated image-data db
 			createTestDbTable(
 				imgDb,
@@ -172,6 +177,7 @@ class TestDownloadInfo(unittest.TestCase):
 				}
 			)
 			downloadInfo(imgDb)
+
 			# Check
 			self.assertEqual(
 				readTestDbTable(imgDb, 'SELECT name, license, artist, credit, restrictions, url from imgs'),
diff --git a/backend/tests/enwiki/test_download_imgs.py b/backend/tests/enwiki/test_download_imgs.py
index 2618b8a..aaf27bc 100644
--- a/backend/tests/enwiki/test_download_imgs.py
+++ b/backend/tests/enwiki/test_download_imgs.py
@@ -1,6 +1,7 @@
 import unittest
 from unittest.mock import Mock, patch
-import tempfile, os
+import tempfile
+import os
 
 from tests.common import readTestFile, createTestDbTable
 from tol_data.enwiki.download_imgs import downloadImgs
@@ -40,10 +41,12 @@ class TestDownloadInfo(unittest.TestCase):
 					('six','cc-by','','fred','','https://upload.wikimedia.org/6.png'),
 				}
 			)
+
 			# Create temp output directory
 			with tempfile.TemporaryDirectory() as outDir:
 				# Run
 				downloadImgs(imgDb, outDir, 0)
+
 				# Check
 				expectedImgs = {
 					'1.jpg': 'img:https://upload.wikimedia.org/1.jpg',
diff --git a/backend/tests/enwiki/test_gen_desc_data.py b/backend/tests/enwiki/test_gen_desc_data.py
index 801aa69..0d1536b 100644
--- a/backend/tests/enwiki/test_gen_desc_data.py
+++ b/backend/tests/enwiki/test_gen_desc_data.py
@@ -1,5 +1,6 @@
 import unittest
-import os, tempfile
+import os
+import tempfile
 
 from tests.common import readTestDbTable
 from tol_data.enwiki.gen_desc_data import genData
@@ -12,6 +13,7 @@ class TestGenData(unittest.TestCase):
 			# Run
 			dbFile = os.path.join(tempDir, 'descData.db')
 			genData(TEST_DUMP_FILE, dbFile)
+
 			# Check
 			self.assertEqual(
 				readTestDbTable(dbFile, 'SELECT id, title FROM pages'),
diff --git a/backend/tests/enwiki/test_gen_dump_index_db.py b/backend/tests/enwiki/test_gen_dump_index_db.py
index e0715f3..b918f15 100644
--- a/backend/tests/enwiki/test_gen_dump_index_db.py
+++ b/backend/tests/enwiki/test_gen_dump_index_db.py
@@ -1,5 +1,6 @@
 import unittest
-import tempfile, os
+import tempfile
+import os
 
 from tests.common import createTestBz2, readTestDbTable
 from tol_data.enwiki.gen_dump_index_db import genData
@@ -10,15 +11,18 @@ def runGenData(indexFileContents: str):
 		# Create temp index file
 		indexFile = os.path.join(tempDir, 'index.txt.bz2')
 		createTestBz2(indexFile, indexFileContents)
+
 		# Run
 		dbFile = os.path.join(tempDir, 'data.db')
 		genData(indexFile, dbFile)
+
 		# Read db
 		return readTestDbTable(dbFile, 'SELECT title, id, offset, next_offset FROM offsets')
 
 class TestGenData(unittest.TestCase):
 	def setUp(self):
 		self.maxDiff = None # Remove output-diff size limit
+
 	def test_index_file(self):
 		indexFileContents = (
 			'100:10:apple\n'
@@ -33,6 +37,7 @@ class TestGenData(unittest.TestCase):
 			('banana ice-cream', 99, 300, 1000),
 			('Custard!', 2030, 1000, -1),
 		})
+
 	def test_emp_index(self):
 		offsetsMap = runGenData('')
 		self.assertEqual(offsetsMap, set())
diff --git a/backend/tests/enwiki/test_gen_img_data.py b/backend/tests/enwiki/test_gen_img_data.py
index 1703b78..0a8f79d 100644
--- a/backend/tests/enwiki/test_gen_img_data.py
+++ b/backend/tests/enwiki/test_gen_img_data.py
@@ -1,5 +1,6 @@
 import unittest
-import tempfile, os
+import tempfile
+import os
 
 from tests.common import createTestDbTable, readTestDbTable
 from tol_data.enwiki.gen_img_data import getInputPageIdsFromDb, genData
@@ -20,8 +21,10 @@ class TestGetInputPageIdsFromDb(unittest.TestCase):
 					('and another', 2),
 				}
 			)
+
 			# Run
 			pageIds = getInputPageIdsFromDb(dbFile)
+
 			# Check
 			self.assertEqual(pageIds, {1, 2})
 
@@ -40,9 +43,11 @@ class TestGenData(unittest.TestCase):
 					('Autism',25,0,-1),
 				}
 			)
+
 			# Run
 			imgDb = os.path.join(tempDir, 'imgData.db')
 			genData({10, 25}, TEST_DUMP_FILE, indexDb, imgDb)
+
 			# Check
 			self.assertEqual(
 				readTestDbTable(imgDb, 'SELECT page_id, img_name from page_imgs'),
@@ -51,8 +56,10 @@ class TestGenData(unittest.TestCase):
 					(25, 'Autism-stacking-cans 2nd edit.jpg'),
 				}
 			)
+
 			# Run with updated page-ids set
 			genData({13, 10}, TEST_DUMP_FILE, indexDb, imgDb)
+
 			# Check
 			self.assertEqual(
 				readTestDbTable(imgDb, 'SELECT page_id, img_name from page_imgs'),
diff --git a/backend/tests/enwiki/test_gen_pageview_data.py b/backend/tests/enwiki/test_gen_pageview_data.py
index 5002eb0..0c4a35e 100644
--- a/backend/tests/enwiki/test_gen_pageview_data.py
+++ b/backend/tests/enwiki/test_gen_pageview_data.py
@@ -1,5 +1,6 @@
 import unittest
-import tempfile, os
+import tempfile
+import os
 
 from tests.common import createTestBz2, createTestDbTable, readTestDbTable
 from tol_data.enwiki.gen_pageview_data import genData
@@ -18,6 +19,7 @@ class TestGenData(unittest.TestCase):
 				'fr.wikipedia Four null desktop 12 T6U6\n'
 				'en.wikipedia Three null desktop 10 E4G5Z61\n'
 			))
+
 			# Create temp dump-index db
 			dumpIndexDb = os.path.join(tempDir, 'dump_index.db')
 			createTestDbTable(
@@ -31,9 +33,11 @@ class TestGenData(unittest.TestCase):
 					('Four', 4, 0, -1),
 				}
 			)
+
 			# Run
 			dbFile = os.path.join(tempDir, 'data.db')
 			genData(pageviewFiles, dumpIndexDb, dbFile)
+
 			# Check
 			self.assertEqual(
 				readTestDbTable(dbFile, 'SELECT title, id, views from views'),