Get count of objects in a specific S3 folder using Boto3

Question

Trying to get count of objects in S3 folder

Current code

bucket='some-bucket'
File='someLocation/File/'

objs = boto3.client('s3').list_objects_v2(Bucket=bucket,Prefix=File)
fileCount = objs['KeyCount']

This gives me the count as 1+actual number of objects in S3.

Maybe it is counting "File" as a key too?

Answer 1

If there are more than 1000 entries, you need to use paginators, like this:

count = 0
client = boto3.client('s3')
paginator = client.get_paginator('list_objects')
for result in paginator.paginate(Bucket='your-bucket', Prefix='your-folder/', Delimiter='/'):
    count += len(result.get('CommonPrefixes'))

Answer 2

Assuming you want to count the keys in a bucket and don't want to hit the limit of 1000 using list_objects_v2. The below code worked for me but I'm wondering if there is a better faster way to do it! Tried looking if there's a packaged function in boto3 s3 connector but there isn't!

# connect to s3 - assuming your creds are all set up and you have boto3 installed
s3 = boto3.resource('s3')

# identify the bucket - you can use prefix if you know what your bucket name starts with
for bucket in s3.buckets.all():
    print(bucket.name)

# get the bucket
bucket = s3.Bucket('my-s3-bucket')

# use loop and count increment
count_obj = 0
for i in bucket.objects.all():
    count_obj = count_obj + 1
print(count_obj)