How to calculate annotator distribution over annotations

This script helps to evaluate how many annotations per annotator exist within an exported project's snapshot:

import sys
import json
from collections import Counter

tasks = json.load(open(sys.argv[1]))

emails = []
for task in tasks:
  for annotation in task['annotations']:
    emails.append(annotation['completed_by']['email'])

c = Counter(emails)

for email, count in c.most_common():
  print(email, count)

print('Total', len(emails))

To run the script, use the command below, including the file name of the export you want to evaluate:

python scriptName.py project-export-name.json

You should see an output similar to the below:

user1@example.com 8
user2@example.com 5
user3@example.com 2
Total 15