docs/oneliners.md

@@ -69,3 +69,10 @@ jq -r 'map({user: .members[].name, group: .group}) | map([.user, .group])[] | @c
 ```sh
 jq '.[].members[] |= select((.name != "renku") and (. != null))' < forks.json
 ```
+
+* Identify groups where one student has >90% of contributions:
+
+```sh
+teach-auto activity-stats --prop -exclude-users "teacher_username" forks.json \
+  | jq '.[].contributions | select(any(.total > 0.9))'
+```

teach_auto/activity_stats.py

@@ -58,13 +58,17 @@ def agg_user_contributions(commits: List[Dict[str, Any]], exclude_users: Optiona
             contributions[author][contrib_type] += changes
         contributions[author]["commits"] += 1
     for user in exclude_users:
-        del contributions[user]
+        try:
+            del contributions[user]
+        except KeyError:
+            pass
     if prop:
         contrib_types = ["additions", "deletions", "total", "commits"]
         for ctype in contrib_types:
             total = sum([contributions[u][ctype] for u in contributions])
             for author in contributions:
-                contributions[author][ctype] /= total
+                contrib = contributions[author][ctype]
+                contributions[author][ctype] = round(contrib / total, 3)
 
     return dict(contributions)