tqdm update freq to MB

ecoset.py

@@ -162,7 +162,7 @@ class Ecoset(datasets.GeneratorBasedBuilder):
             if not op.exists(zip_path):
                 s3 = boto3.client(urlinfo.scheme, config=Config(signature_version=UNSIGNED))
                 object_size = s3.head_object(Bucket=urlinfo.netloc, Key=urlinfo.path[1:])["ContentLength"]
-                with tqdm(total=object_size, unit="B", unit_scale=True, desc="Downloading ecoset") as pbar:
+                with tqdm(total=object_size, unit="MB", unit_scale=True, desc="Downloading ecoset") as pbar:
                     s3.download_file(Bucket=urlinfo.netloc, Key=urlinfo.path[1:], Filename=zip_path,
                     Callback=lambda bytes_transferred: pbar.update(bytes_transferred))
             # unzip using platform-based subprocess