Adding upstream version 4.64.1.

Signed-off-by: Daniel Baumann <daniel@debian.org>

tests/tests_dask.py

@@ -0,0 +1,20 @@
+from __future__ import division
+
+from time import sleep
+
+from .tests_tqdm import importorskip, mark
+
+pytestmark = mark.slow
+
+
+def test_dask(capsys):
+    """Test tqdm.dask.TqdmCallback"""
+    ProgressBar = importorskip('tqdm.dask').TqdmCallback
+    dask = importorskip('dask')
+
+    schedule = [dask.delayed(sleep)(i / 10) for i in range(5)]
+    with ProgressBar(desc="computing"):
+        dask.compute(schedule)
+    _, err = capsys.readouterr()
+    assert "computing: " in err
+    assert '5/5' in err