downloading large files

from tqdm import tqdm
import requests

# file url
url = 'https://dumps.wikimedia.org/enwiki/latest/enwiki-latest-stub-meta-history.xml.gz' #file size is '70.5GB'
# stream true is required
response = requests.get(url, stream=True)
# total file size
t = int(response.headers.get('content-length', 0))
block_size = 1024**2 #1 Mbit
progress_bar = tqdm(total=t, unit='iB', unit_scale=True)
with open('enwiki-latest-stub-meta-history.xml.gz', 'wb') as file:
    for data in response.iter_content(block_size):
        progress_bar.update(len(data))
        file.write(data)
progress_bar.close()
if ( t != 0 ) and ( progress_bar.n != t ) : print("ERROR downloading file!")