Update fileinput to CPython 3.11.5

Author: dvermd

Lib/fileinput.py

@@ -217,15 +217,10 @@ def __init__(self, files=None, inplace=False, backup="", *,
                           EncodingWarning, 2)
 
         # restrict mode argument to reading modes
-        if mode not in ('r', 'rU', 'U', 'rb'):
-            raise ValueError("FileInput opening mode must be one of "
-                             "'r', 'rU', 'U' and 'rb'")
-        if 'U' in mode:
-            import warnings
-            warnings.warn("'U' mode is deprecated",
-                          DeprecationWarning, 2)
+        if mode not in ('r', 'rb'):
+            raise ValueError("FileInput opening mode must be 'r' or 'rb'")
         self._mode = mode
-        self._write_mode = mode.replace('r', 'w') if 'U' not in mode else 'w'
+        self._write_mode = mode.replace('r', 'w')
         if openhook:
             if inplace:
                 raise ValueError("FileInput cannot use an opening hook in inplace mode")
@@ -262,21 +257,6 @@ def __next__(self):
             self.nextfile()
             # repeat with next file
 
-    def __getitem__(self, i):
-        import warnings
-        warnings.warn(
-            "Support for indexing FileInput objects is deprecated. "
-            "Use iterator protocol instead.",
-            DeprecationWarning,
-            stacklevel=2
-        )
-        if i != self.lineno():
-            raise RuntimeError("accessing lines out of order")
-        try:
-            return self.__next__()
-        except StopIteration:
-            raise IndexError("end of input reached")
-
     def nextfile(self):
         savestdout = self._savestdout
         self._savestdout = None

Lib/test/test_fileinput.py

@@ -29,7 +29,6 @@
 from test.support.os_helper import TESTFN
 from test.support.os_helper import unlink as safe_unlink
 from test.support import os_helper
-from test.support import warnings_helper
 from test import support
 from unittest import mock
 
@@ -230,22 +229,11 @@ def test_fileno(self):
         line = list(fi)
         self.assertEqual(fi.fileno(), -1)
 
-    # TODO: RUSTPYTHON
-    @unittest.expectedFailure
-    def test_opening_mode(self):
-        try:
-            # invalid mode, should raise ValueError
-            fi = FileInput(mode="w", encoding="utf-8")
-            self.fail("FileInput should reject invalid mode argument")
-        except ValueError:
-            pass
-        # try opening in universal newline mode
-        t1 = self.writeTmp(b"A\nB\r\nC\rD", mode="wb")
-        with warnings_helper.check_warnings(('', DeprecationWarning)):
-            fi = FileInput(files=t1, mode="U", encoding="utf-8")
-        with warnings_helper.check_warnings(('', DeprecationWarning)):
-            lines = list(fi)
-        self.assertEqual(lines, ["A\n", "B\n", "C\n", "D"])
+    def test_invalid_opening_mode(self):
+        for mode in ('w', 'rU', 'U'):
+            with self.subTest(mode=mode):
+                with self.assertRaises(ValueError):
+                    FileInput(mode=mode)
 
     def test_stdin_binary_mode(self):
         with mock.patch('sys.stdin') as m_stdin:
@@ -380,44 +368,6 @@ def test_empty_files_list_specified_to_constructor(self):
         with FileInput(files=[], encoding="utf-8") as fi:
             self.assertEqual(fi._files, ('-',))
 
-    @warnings_helper.ignore_warnings(category=DeprecationWarning)
-    def test__getitem__(self):
-        """Tests invoking FileInput.__getitem__() with the current
-           line number"""
-        t = self.writeTmp("line1\nline2\n")
-        with FileInput(files=[t], encoding="utf-8") as fi:
-            retval1 = fi[0]
-            self.assertEqual(retval1, "line1\n")
-            retval2 = fi[1]
-            self.assertEqual(retval2, "line2\n")
-
-    def test__getitem___deprecation(self):
-        t = self.writeTmp("line1\nline2\n")
-        with self.assertWarnsRegex(DeprecationWarning,
-                                   r'Use iterator protocol instead'):
-            with FileInput(files=[t]) as fi:
-                self.assertEqual(fi[0], "line1\n")
-
-    @warnings_helper.ignore_warnings(category=DeprecationWarning)
-    def test__getitem__invalid_key(self):
-        """Tests invoking FileInput.__getitem__() with an index unequal to
-           the line number"""
-        t = self.writeTmp("line1\nline2\n")
-        with FileInput(files=[t], encoding="utf-8") as fi:
-            with self.assertRaises(RuntimeError) as cm:
-                fi[1]
-        self.assertEqual(cm.exception.args, ("accessing lines out of order",))
-
-    @warnings_helper.ignore_warnings(category=DeprecationWarning)
-    def test__getitem__eof(self):
-        """Tests invoking FileInput.__getitem__() with the line number but at
-           end-of-input"""
-        t = self.writeTmp('')
-        with FileInput(files=[t], encoding="utf-8") as fi:
-            with self.assertRaises(IndexError) as cm:
-                fi[0]
-        self.assertEqual(cm.exception.args, ("end of input reached",))
-
     def test_nextfile_oserror_deleting_backup(self):
         """Tests invoking FileInput.nextfile() when the attempt to delete
            the backup file would raise OSError.  This error is expected to be
@@ -1031,10 +981,6 @@ def check(mode, expected_lines):
             self.assertEqual(lines, expected_lines)
 
         check('r', ['A\n', 'B\n', 'C\n', 'D\u20ac'])
-        with self.assertWarns(DeprecationWarning):
-            check('rU', ['A\n', 'B\n', 'C\n', 'D\u20ac'])
-        with self.assertWarns(DeprecationWarning):
-            check('U', ['A\n', 'B\n', 'C\n', 'D\u20ac'])
         with self.assertRaises(ValueError):
             check('rb', ['A\n', 'B\r\n', 'C\r', 'D\u20ac'])