Restrict repos to those we have push access to

There may be repositories on the user's list that they don't have push
access to. This will cause failures when retrieving statistics from them
as the API's require a higher level of permissions.

get_traffic.py

@@ -23,20 +23,27 @@ def updateUserStats(self):
         repos = user.get_repos()
 
         results = [None] * repos.totalCount
-        idx = 0
+
         threads = []
-        for repo in repos:
-            # Spawn a thread for each repo 
-            t = Thread(target=self.updateRepoStats, args=(repo,results,idx,))
+
+        # We're only able to retrieve repo statistics for those we can push to
+        repos = [repo for repo in repos if repo.permissions.push]
+        results = [None] * len(repos)
+
+        for idx, repo in enumerate(repos):
+            # Spawn a thread for each repo
+            t = Thread(target=self.updateRepoStats, args=(repo, results, idx,))
             t.start()
             threads.append(t)
-            idx += 1
 
         # Wait for all threads to execute
         while len(threads):
             threads = [t for t in threads if t.is_alive()]
 
-        df = pd.read_csv(f'{self.user_name}.csv') if os.path.exists(f'{self.user_name}.csv') else pd.DataFrame(columns=['Repo', 'Views', 'Stars', 'Watching', 'Forks', 'Clones'])
+        if os.path.exists(f'{self.user_name}.csv'):
+            df = pd.read_csv(f'{self.user_name}.csv')
+        else:
+            df = pd.DataFrame(columns=['Repo', 'Views', 'Stars', 'Watching', 'Forks', 'Clones'])
         changed = False
         # Evaluate all repo results and update output CSV accordingly
         for row in results: