diff --git a/tests/discovery/test_githubcode.py b/tests/discovery/test_githubcode.py
index d4b00e5a..f4c00c5d 100644
--- a/tests/discovery/test_githubcode.py
+++ b/tests/discovery/test_githubcode.py
@@ -112,4 +112,4 @@ class TestSearchGithubCode:
         assert(None is test_class_instance.next_page_or_end(test_result))
 
     if __name__ == '__main__':
-        pytest.main()
\ No newline at end of file
+        pytest.main()
diff --git a/tests/test_myparser.py b/tests/test_myparser.py
index 72cd6243..0810f37c 100755
--- a/tests/test_myparser.py
+++ b/tests/test_myparser.py
@@ -16,4 +16,4 @@ class TestMyParser(object):
 
 
 if __name__ == '__main__':
-    pytest.main()
\ No newline at end of file
+    pytest.main()
diff --git a/theHarvester/discovery/__init__.py b/theHarvester/discovery/__init__.py
index 279dab8c..8257fb5b 100644
--- a/theHarvester/discovery/__init__.py
+++ b/theHarvester/discovery/__init__.py
@@ -8,6 +8,7 @@ __all__ = ['baidusearch',
            'dogpilesearch',
            'duckduckgosearch',
            'exaleadsearch',
+           'githubcode',
            'googlesearch',
            'huntersearch',
            'intelxsearch',
diff --git a/theHarvester/lib/graphs.py b/theHarvester/lib/graphs.py
index 42005d8d..480555be 100644
--- a/theHarvester/lib/graphs.py
+++ b/theHarvester/lib/graphs.py
@@ -142,7 +142,7 @@ class BarGraph:
 
         # debug mode: 0 = off, 1 = on; just views some extra information
         self.debug = 0
-    #-------------------------------------------------------------------------
+    # -------------------------------------------------------------------------
 
     # Default bar colors; only used if barColors isn't set.
     __colors = (
@@ -658,8 +658,7 @@ class BarGraph:
                         m = False
 
                     if m or not i:
-                        label = (
-                                        lcnt < len(r)) and r[lcnt].strip() or str(i + 1)
+                        label = (lcnt < len(r)) and r[lcnt].strip() or str(i + 1)
                         graph += '<tr>'
 
                         if len(r):
diff --git a/theHarvester/lib/hostchecker.py b/theHarvester/lib/hostchecker.py
index cb0bca88..0c3997b1 100644
--- a/theHarvester/lib/hostchecker.py
+++ b/theHarvester/lib/hostchecker.py
@@ -20,6 +20,6 @@ class Checker:
                 res = socket.gethostbyname(x)
                 res = str(res)
                 self.realhosts.append(x + ':' + res)
-            except Exception as e:
+            except Exception:
                 self.realhosts.append(x + ':' + 'empty')
         return self.realhosts
diff --git a/theHarvester/lib/reportgraph.py b/theHarvester/lib/reportgraph.py
index 7a5aa121..7c73cbb1 100644
--- a/theHarvester/lib/reportgraph.py
+++ b/theHarvester/lib/reportgraph.py
@@ -83,12 +83,12 @@ except Exception:
                     name='email')
 
                 data = [trace0, trace1, trace2, trace3, trace4]
-                layout = dict(title='Scanning history for ' + domain, xaxis=dict(title='Date'), yaxis=dict(title='Results'))
+                layout = dict(title=f'Scanning history for {domain}', xaxis=dict(title='Date'),
+                              yaxis=dict(title='Results'))
                 scatterchartcode = plotly.offline.plot({
                     'data': data,
-                    'layout': layout}, auto_open=False, include_plotlyjs=False, filename='report.html', output_type='div')
+                    'layout': layout}, auto_open=False, include_plotlyjs=False, filename='report.html',
+                    output_type='div')
                 return scatterchartcode
             except Exception as e:
                 print(f'Error generating HTML for the historical graph for domain: {e}')
-
-