Implement properties on _TextIOBase and StringIO (#5987)

ever0de · web-flow · commit 5f1290d86eb3 · 2025-07-17T13:42:38.000+09:00
diff --git a/Lib/test/test_memoryio.py b/Lib/test/test_memoryio.py
@@ -940,8 +940,6 @@ def test_relative_seek(self):
     def test_seek(self):
         super().test_seek()
 
-    # TODO: RUSTPYTHON
-    @unittest.expectedFailure
     def test_textio_properties(self):
         super().test_textio_properties()
 
@@ -1046,8 +1044,6 @@ def test_newlines_property(self):
     def test_relative_seek(self):
         super().test_relative_seek()
 
-    # TODO: RUSTPYTHON
-    @unittest.expectedFailure
     def test_textio_properties(self):
         super().test_textio_properties()
 
diff --git a/vm/src/stdlib/io.rs b/vm/src/stdlib/io.rs
@@ -738,6 +738,11 @@ mod _io {
         fn encoding(_zelf: PyObjectRef, vm: &VirtualMachine) -> PyObjectRef {
             vm.ctx.none()
         }
+
+        #[pygetset]
+        fn errors(_zelf: PyObjectRef, vm: &VirtualMachine) -> PyObjectRef {
+            vm.ctx.none()
+        }
     }
 
     #[derive(FromArgs, Clone)]
@@ -3594,6 +3599,11 @@ mod _io {
             let pos = pos.try_usize(vm)?;
             Ok(buffer.truncate(pos))
         }
+
+        #[pygetset]
+        fn line_buffering(&self) -> bool {
+            false
+        }
     }
 
     #[pyattr]

Original file line number	Diff line number	Diff line change
`@@ -738,6 +738,11 @@ mod _io {`
`738`	`738`	`fn encoding(_zelf: PyObjectRef, vm: &VirtualMachine) -> PyObjectRef {`
`739`	`739`	`vm.ctx.none()`
`740`	`740`	`}`
	`741`	`+`
	`742`	`+ #[pygetset]`
	`743`	`+ fn errors(_zelf: PyObjectRef, vm: &VirtualMachine) -> PyObjectRef {`
	`744`	`+ vm.ctx.none()`
	`745`	`+ }`
`741`	`746`	`}`
`742`	`747`
`743`	`748`	`#[derive(FromArgs, Clone)]`
`@@ -3594,6 +3599,11 @@ mod _io {`
`3594`	`3599`	`let pos = pos.try_usize(vm)?;`
`3595`	`3600`	`Ok(buffer.truncate(pos))`
`3596`	`3601`	`}`
	`3602`	`+`
	`3603`	`+ #[pygetset]`
	`3604`	`+ fn line_buffering(&self) -> bool {`
	`3605`	`+ false`
	`3606`	`+ }`
`3597`	`3607`	`}`
`3598`	`3608`
`3599`	`3609`	`#[pyattr]`