S3 appending random string in file name

I have a s3 folder with a csv file stored on it. I’m trying to download the last modified file. I’m using this script to get the last modified file:

s3_client = boto3.client('s3', aws_access_key_id=s3_extra_data['aws_access_key_id'],                               
aws_secret_access_key=s3_extra_data['aws_secret_access_key'])
response = s3_client.list_objects_v2(Bucket='test', Prefix='file_r/')
all = response['Contents']
latest = max(all, key=lambda x: x['LastModified'])
response = s3_client.list_objects_v2(Bucket='test', Prefix=latest["Key"])[:-52].lower())
all = response['Contents']
latest = max(all, key=lambda x: x['LastModified'])
print("LATEST ->" + str(latest["Key"])[:-52].lower())
print("PATH ->" + str(latest["Key"]))
s3_client.download_file("test", latest["Key"], str(latest["Key"]))

This code lists my last modified object, the file name is part-00000-40f267f2-38dc-4bab-811c-4c3052fdb1ba-c000.csv and is inside the file_r folder.

Although, when I use s3_client.download_file i get the following error:

'file_r/part-00000-40f267f2-38dc-4bab-811c-4c3052fdb1ba-c000.csv.8cEebaeb'

When i print my path and my file I get the correct values

 LATEST -> file_r/part
 PATH -> file_r/part-00000-40f267f2-38dc-4bab-811c-4c3052fdb1ba-c000.csv

Why the value .8cEebaeb is appended after the .csv extension since the PATH is correct.

Any thoughs on that?

Answer

To solve the problem I changed the code to:

s3_client = boto3.client('s3', aws_access_key_id=s3_extra_data['aws_access_key_id'],                               
aws_secret_access_key=s3_extra_data['aws_secret_access_key'])
response = s3_client.list_objects_v2(Bucket='test', Prefix='file_r/')
all = response['Contents']
latest = max(all, key=lambda x: x['LastModified'])
s3_client.download_file("test", latest["Key"], "FILE_NAME"))