1 files changed, 45 insertions, 0 deletions
diff --git a/third_party/python/dlmanager/examples/dl_tqdm.py b/third_party/python/dlmanager/examples/dl_tqdm.py
new file mode 100644
index 0000000000..a4e458a415
--- /dev/null
+++ b/third_party/python/dlmanager/examples/dl_tqdm.py
@@ -0,0 +1,45 @@
+import argparse
+import tqdm
+
+from six.moves.urllib.parse import urlparse
+
+from dlmanager import Download
+
+
+def parse_args(argv=None):
+    parser = argparse.ArgumentParser()
+    parser.add_argument("url", help="url to download")
+    return parser.parse_args(argv)
+
+
+def download_progress(bar):
+    last_b = [0]
+
+    def inner(_, current, total):
+        if total is not None:
+            bar.total = total
+        delta = current - last_b[0]
+        last_b[0] = current
+
+        if delta > 0:
+            bar.update(delta)
+    return inner
+
+
+def download_file(url, dest=None):
+    if dest is None:
+        dest = urlparse(url).path.split('/')[-1]
+
+    with tqdm.tqdm(unit='B', unit_scale=True, miniters=1, dynamic_ncols=True,
+                   desc=dest) as bar:
+        dl = Download(url, dest, progress=download_progress(bar))
+        dl.start()
+        dl.wait()
+
+
+if __name__ == '__main__':
+    options = parse_args()
+    try:
+        download_file(options.url)
+    except KeyboardInterrupt:
+        print("\nInterrupted.")