in perf_dashboard/posts_stats.py [0:0]
def count_unique_tags(data):
flattened_tag_list = [tag for tag_list in data for tag in tag_list]
tag_count = Counter(flattened_tag_list)
# Add current timestamp to the rows
date_time = datetime.datetime.now()
time_tag_count = [(date_time,) + item for item in tag_count.items()]
return time_tag_count