import boto3
s3_resource = boto3.resource('s3')
bucket = s3_resource.Bucket(name='{bucket_name}')
for file in bucket.objects.all():
# do what you want with the files
# for example:
if 'filter' in file.key:
print(file.key)
new_df = pd.read_csv('s3:://{bucket_name}/{}'.format(file.key))