s3fs download file python

import pandas as pd
import datetime
import os
import s3fs
import numpy as np

#Creds for s3
fs = s3fs.S3FileSystem(key=mykey, secret=mysecretkey)
bucket = "s3://mys3bucket/mys3bucket"

#files references the entire bucket.
files = fs.ls(bucket)

for file in files:
    fs.download(file,'test.csv')