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-rwxr-xr-xLib/idlelib/PyShell.py3
-rw-r--r--Misc/NEWS2
2 files changed, 5 insertions, 0 deletions
diff --git a/Lib/idlelib/PyShell.py b/Lib/idlelib/PyShell.py
index 6674f4ecdd..55fd3574d4 100755
--- a/Lib/idlelib/PyShell.py
+++ b/Lib/idlelib/PyShell.py
@@ -1381,6 +1381,9 @@ class PseudoInputFile(PseudoFile):
line = self._line_buffer or self.shell.readline()
if size < 0:
size = len(line)
+ eol = line.find('\n', 0, size)
+ if eol >= 0:
+ size = eol + 1
self._line_buffer = line[size:]
return line[:size]
diff --git a/Misc/NEWS b/Misc/NEWS
index 8dddb6afe6..f9db232016 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -169,6 +169,8 @@ Library
IDLE
----
+- Issue #20058: sys.stdin.readline() in IDLE now always returns only one line.
+
- Issue #19481: print() of string subclass instance in IDLE no longer hangs.
- Issue #18270: Prevent possible IDLE AttributeError on OS X when no initial