bpo-9372: Deprecate several __getitem__ methods (GH-8609)
The __getitem__ methods of DOMEventStream, FileInput,
and FileWrapper classes ignore their 'index' parameters
and return the next item instead.
diff --git a/Lib/fileinput.py b/Lib/fileinput.py
index c6fc9a1..a7f8df3 100644
--- a/Lib/fileinput.py
+++ b/Lib/fileinput.py
@@ -259,6 +259,13 @@
# 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: