A simple script to count all documents in all mongo databases

count_mongodb.py

from pymongo import MongoClient

client = MongoClient()
cot = 0
size = 0
db_list = client.database_names()
db_list.sort()

# forked from persepolis download manager
def humanReadbleSize(size):
    labels = ['KiB', 'MiB', 'GiB', 'TiB']
    i = -1
    if size < 1024:
        return str(size) + ' B'

    while size >= 1024:
        i += 1
        size = size / 1024

    p = 2 if i > 1 else None
    return str(round(size, p)) + ' ' + labels[i]


for i in db_list:
    db = client[i]
    col = db.collection_names(include_system_collections=False)
    b = db.command("dbstats")
    res1 = '\t' + b['db'] + '\t\t' + str(b['objects']) + '\t\t' + \
        humanReadbleSize(b['fileSize'])
    cot += b['objects']
    size += b['fileSize']
    print(res1)
print('\n\t〽️ ' + str(cot))
print('\t📊 ' + humanReadbleSize(size))