bump version, merge branch 'devel'

- fix missing `sys.setcheckinterval` in py3.9 (#978)
- fix `keras.TqdmCallback` compatibility with `tensorflow==2.2.0` (#979)
- update documentation
  + correct `contrib.concurrent` correct `max_workers` (#977)
  + drop prominent mention of `xrange` (#965)

.meta/.readme.rst

@@ -24,7 +24,7 @@ iterable with ``tqdm(iterable)``, and you're done!
 ``76%|████████████████████████        | 7568/10000 [00:33<00:10, 229.00it/s]``
 
 ``trange(N)`` can be also used as a convenient shortcut for
-``tqdm(xrange(N))``.
+``tqdm(range(N))``.
 
 |Screenshot|
     |Video| |Slides|

README.rst

@@ -24,7 +24,7 @@ iterable with ``tqdm(iterable)``, and you're done!
 ``76%|████████████████████████        | 7568/10000 [00:33<00:10, 229.00it/s]``
 
 ``trange(N)`` can be also used as a convenient shortcut for
-``tqdm(xrange(N))``.
+``tqdm(range(N))``.
 
 |Screenshot|
     |Video| |Slides|

tqdm/_version.py

@@ -5,7 +5,7 @@
 __all__ = ["__version__"]
 
 # major, minor, patch, -extra
-version_info = 4, 46, 0
+version_info = 4, 46, 1
 
 # Nice string for the version
 __version__ = '.'.join(map(str, version_info))

tqdm/contrib/concurrent.py

@@ -34,7 +34,7 @@ def _executor_map(PoolExecutor, fn, *iterables, **tqdm_kwargs):
     Parameters
     ----------
     tqdm_class  : [default: tqdm.auto.tqdm].
-    max_workers  : [default: max(32, cpu_count() + 4)].
+    max_workers  : [default: min(32, cpu_count() + 4)].
     chunksize  : [default: 1].
     """
     kwargs = deepcopy(tqdm_kwargs)
@@ -87,7 +87,7 @@ def process_map(fn, *iterables, **tqdm_kwargs):
     max_workers : int, optional
         Maximum number of workers to spawn; passed to
         `concurrent.futures.ProcessPoolExecutor.__init__`.
-        [default: max(32, cpu_count() + 4)].
+        [default: min(32, cpu_count() + 4)].
     chunksize : int, optional
         Size of chunks sent to worker processes; passed to
         `concurrent.futures.ProcessPoolExecutor.map`. [default: 1].

tqdm/keras.py

@@ -91,3 +91,12 @@ def on_train_end(self, *_, **__):
         if self.verbose:
             self.batch_bar.close()
         self.epoch_bar.close()
+
+    def _implements_train_batch_hooks(self):
+        return True
+
+    def _implements_test_batch_hooks(self):
+        return True
+
+    def _implements_predict_batch_hooks(self):
+        return True

tqdm/tests/tests_tqdm.py

@@ -123,7 +123,10 @@ def cpu_timify(t, timer=None):
 
 def pretest():
     # setcheckinterval is deprecated
-    getattr(sys, 'setswitchinterval', getattr(sys, 'setcheckinterval'))(100)
+    try:
+        sys.setswitchinterval(1)
+    except AttributeError:
+        sys.setcheckinterval(100)
 
     if getattr(tqdm, "_instances", False):
         n = len(tqdm._instances)