Adjust rounding logic when precision is None in gr.Number() (#6829)

* adjust precision handling
add test

* add changeset

* formatting

---------

Co-authored-by: gradio-pr-bot <gradio-pr-bot@users.noreply.github.com>

.changeset/evil-bats-design.md

@@ -0,0 +1,5 @@
+---
+"gradio": patch
+---
+
+fix:Adjust rounding logic when precision is `None` in `gr.Number()`

gradio/components/number.py

@@ -99,10 +99,10 @@ def _round_to_precision(num: float | int, precision: int | None) -> float | int:
             num: Number to round.
             precision: Precision to round to.
         Returns:
-            rounded number
+            rounded number or the original number if precision is None
         """
         if precision is None:
-            return float(num)
+            return num
         elif precision == 0:
             return int(round(num, precision))
         else:

test/test_components.py

@@ -232,12 +232,32 @@ def test_component_functions_precision(self):
         assert numeric_input.postprocess(2.1421) == 2.14
         assert numeric_input.postprocess(None) is None
 
+    def test_precision_none_with_integer(self):
+        """
+        Preprocess, postprocess
+        """
+        numeric_input = gr.Number(precision=None)
+        assert numeric_input.preprocess(5) == 5
+        assert isinstance(numeric_input.preprocess(5), int)
+        assert numeric_input.postprocess(5) == 5
+        assert isinstance(numeric_input.postprocess(5), int)
+
+    def test_precision_none_with_float(self):
+        """
+        Preprocess, postprocess
+        """
+        numeric_input = gr.Number(value=5.5, precision=None)
+        assert numeric_input.preprocess(5.5) == 5.5
+        assert isinstance(numeric_input.preprocess(5.5), float)
+        assert numeric_input.postprocess(5.5) == 5.5
+        assert isinstance(numeric_input.postprocess(5.5), float)
+
     def test_in_interface_as_input(self):
         """
         Interface, process
         """
         iface = gr.Interface(lambda x: x**2, "number", "textbox")
-        assert iface(2) == "4.0"
+        assert iface(2) == "4"
 
     def test_precision_0_in_interface(self):
         """