Fix a myriad of linting errors

* Fix linting errors like:

  - Unused variables
  - Undeclared variable errors (mostly caused by typos, and wrong names)
  - Missing documentation strings for functions

  etc.

1 files changed, 6 insertions, 0 deletions

diff --git a/tests/unit/db/test_correlation.py b/tests/unit/db/test_correlation.py
index 866d28d..3f940b2 100644
--- a/tests/unit/db/test_correlation.py
+++ b/tests/unit/db/test_correlation.py
@@ -13,6 +13,9 @@ class TestCorrelation(TestCase):
     maxDiff = None
 
     def test_build_query_sgo_lit_corr(self):
+        """
+        Test that the literature correlation query is built correctly.
+        """
         self.assertEqual(
             build_query_sgo_lit_corr(
                 "Probeset",
@@ -51,6 +54,9 @@ class TestCorrelation(TestCase):
              2))
 
     def test_build_query_tissue_corr(self):
+        """
+        Test that the tissue correlation query is built correctly.
+        """
         self.assertEqual(
             build_query_tissue_corr(
                 "Probeset",