proxy isatty

CHANGELOG.md

@@ -16,6 +16,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Fixed empty print ignoring the `end` parameter
 - Fixed `Text.from_ansi` removing newlines https://github.com/Textualize/rich/pull/4076
+- Fixed `FileProxy.isatty` not proxying https://github.com/Textualize/rich/pull/4077
 
 ## [14.3.4] - 2026-04-11
 

rich/file_proxy.py

@@ -55,3 +55,6 @@ def flush(self) -> None:
 
     def fileno(self) -> int:
         return self.__file.fileno()
+
+    def isatty(self) -> bool:
+        return self.__file.isatty()

tests/test_file_proxy.py

@@ -35,3 +35,20 @@ def test_new_lines():
     assert file.getvalue() == "-\n"
     file_proxy.flush()
     assert file.getvalue() == "-\n-\n"
+
+
+def test_isatty():
+    """Check isatty is proxied
+
+    Regression test for https://github.com/Textualize/rich/issues/4041
+
+    """
+
+    class TTYFile:
+        def isatty(self) -> bool:
+            return True
+
+    file = TTYFile()
+    console = Console()
+    file_proxy = FileProxy(console, file)
+    assert file_proxy.isatty()