Remove sys.stdin redirection (closes #1083)

product/runtime/docs/sphinx/android.rst

@@ -563,7 +563,7 @@ by non-Python libraries. If you want to redirect them as well, see
 `AndroidPlatform.redirectStdioToLogcat
 <java/com/chaquo/python/android/AndroidPlatform.html#redirectStdioToLogcat()>`_.
 
-By default, :any:`sys.stdin` always returns EOF. If you want to run some code which takes
+:any:`sys.stdin` always returns EOF. If you want to run some code which takes
 interactive text input, have a look at the `console app template
 <https://github.com/chaquo/chaquopy-console>`_.
 

product/runtime/src/main/python/java/android/stream.py

@@ -19,24 +19,11 @@
 
 
 def initialize():
-    sys.stdin = EmptyInputStream()
-
     # Log levels are consistent with those used by Java.
     sys.stdout = TextLogStream(Log.INFO, "python.stdout")
     sys.stderr = TextLogStream(Log.WARN, "python.stderr")
 
 
-class EmptyInputStream(io.TextIOBase):
-    def readable(self):
-        return True
-
-    def read(self, size=None):
-        return ""
-
-    def readline(self, size=None):
-        return ""
-
-
 class TextLogStream(io.TextIOWrapper):
     def __init__(self, level, tag):
         super().__init__(BinaryLogStream(self, level, tag),

product/runtime/src/test/python/chaquopy/test/android/test_stream.py

@@ -71,6 +71,9 @@ def test_str(self):
         for stream_name, level in [("stdout", "I"), ("stderr", "W")]:
             with self.subTest(stream=stream_name):
                 stream = getattr(sys, stream_name)
+                original_stream = getattr(sys, f"__{stream_name}__")
+                self.assertIsNot(stream, original_stream)
+
                 # We use assertIn rather than assertEqual, because the demo app wraps the
                 # TextLogStream with a ConsoleOutputStream.
                 tag = f"python.{stream_name}"
@@ -303,9 +306,19 @@ def write(b, lines=None):
 class TestAndroidInput(FilterWarningsCase):
 
     def test_str(self):
+        self.assertIs(sys.stdin, sys.__stdin__)
         self.assertTrue(sys.stdin.readable())
         self.assertFalse(sys.stdin.writable())
         self.assertEqual("", sys.stdin.read())
         self.assertEqual("", sys.stdin.read(42))
         self.assertEqual("", sys.stdin.readline())
         self.assertEqual("", sys.stdin.readline(42))
+
+    def test_bytes(self):
+        buffer = sys.stdin.buffer
+        self.assertTrue(buffer.readable())
+        self.assertFalse(buffer.writable())
+        self.assertEqual(b"", buffer.read())
+        self.assertEqual(b"", buffer.read(42))
+        self.assertEqual(b"", buffer.readline())
+        self.assertEqual(b"", buffer.readline(42))