Add flag to render in binary/decimal suffix in DownloadColumn

 Add a test for rendering binary suffix in test_progress.py

rich/progress.py

@@ -48,7 +48,6 @@
 
 ProgressType = TypeVar("ProgressType")
 
-
 GetTimeCallable = Callable[[], float]
 
 
@@ -292,15 +291,30 @@ def render(self, task: "Task") -> Text:
 
 
 class DownloadColumn(ProgressColumn):
-    """Renders file size downloaded and total, e.g. '0.5/2.3 GB'."""
+    """Renders file size downloaded and total, e.g. '0.5/2.3 GB'.
+
+    Args:
+        decimal_suffix (bool, optional): Flag to renser filesize in desired format, disable to render in binary. Defaults to True.
+    """
+
+    def __init__(self, decimal_suffix: bool = True) -> None:
+        self.decimal_ssuffix = decimal_suffix
+        super().__init__()
 
     def render(self, task: "Task") -> Text:
         """Calculate common unit for completed and total."""
         completed = int(task.completed)
         total = int(task.total)
-        unit, suffix = filesize.pick_unit_and_suffix(
-            total, ["bytes", "KB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB"], 1000
-        )
+        if self.decimal_ssuffix:
+            unit, suffix = filesize.pick_unit_and_suffix(
+                total, ["bytes", "KB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB"], 1000
+            )
+        else:
+            unit, suffix = filesize.pick_unit_and_suffix(
+                total,
+                ["bytes", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "ZiB", "YiB"],
+                1024,
+            )
         completed_ratio = completed / unit
         total_ratio = total / unit
         precision = 0 if unit == 1 else 1

tests/test_progress.py

@@ -88,6 +88,15 @@ def test_download_progress_uses_decimal_units() -> None:
     assert rendered_progress == expected
 
 
+def test_download_progress_uses_binary_units() -> None:
+
+    column = DownloadColumn(decimal_suffix=False)
+    test_task = Task(1, "test", 1024, 512, _get_time=lambda: 1.0)
+    rendered_progress = str(column.render(test_task))
+    expected = "0.5/1.0 KiB"
+    assert rendered_progress == expected
+
+
 def test_task_ids():
     progress = make_progress()
     assert progress.task_ids == [0, 1, 2, 4]