May 20, 2025 · May 20, 2025
diff --git a/Lib/_pyrepl/simple_interact.py b/Lib/_pyrepl/simple_interact.py
 importsys
 importcode
 importwarnings
 importerrno

 from .readlineimport_get_reader,multiline_input,append_history_file

 append_history_file()
 except (FileNotFoundError,PermissionError,OSError)ase:
 warnings.warn(f"failed to open the history file for writing:{e}")

 input_n+=1
 exceptKeyboardInterrupt:
 r=_get_reader()
diff --git a/Lib/site.py b/Lib/site.py
 import _sitebuiltins
 import _io as io
 import stat
 import errno

 # Prefixes for site-packages; add additional prefixes like /usr/local here
 PREFIXES = [sys.prefix, sys.exec_prefix]
        def write_history():
            try:
                readline_module.write_history_file(history)
            except(FileNotFoundError, PermissionError):
            except FileNotFoundError, PermissionError:
                # home directory does not exist or is not writable
                # https://bugs.python.org/issue19891
                pass
            except OSError:
                if errno.EROFS:
                    pass  # gh-128066: read-only file system
                else:
                    raise

        atexit.register(write_history)

diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2025-05-20-14-41-50.gh-issue-128066.qzzGfv.rst b/Misc/NEWS.d/next/Core_and_Builtins/2025-05-20-14-41-50.gh-issue-128066.qzzGfv.rst
 Fixes an edge case where PyREPL improperly threw an error when Python is
 invoked on a read only filesystem while trying to write history file
 entries.
Original file line number	Diff line number	Diff line change
Expand Up		@@ -31,6 +31,7 @@
		importsys
		importcode
		importwarnings
		importerrno

		from .readlineimport_get_reader,multiline_input,append_history_file

Expand DownExpand Up		@@ -153,6 +154,7 @@ def maybe_run_command(statement: str) -> bool:
		append_history_file()
		except (FileNotFoundError,PermissionError,OSError)ase:
		warnings.warn(f"failed to open the history file for writing:{e}")

		input_n+=1
		exceptKeyboardInterrupt:
		r=_get_reader()
Expand Down
Original file line number	Diff line number	Diff line change
Expand Up		@@ -75,6 +75,7 @@
		import _sitebuiltins
		import _io as io
		import stat
		import errno

		# Prefixes for site-packages; add additional prefixes like /usr/local here
		PREFIXES = [sys.prefix, sys.exec_prefix]
Expand DownExpand Up		@@ -578,10 +579,15 @@ def register_readline():
		def write_history():
		try:
		readline_module.write_history_file(history)
		except(FileNotFoundError, PermissionError):
		except FileNotFoundError, PermissionError:
		# home directory does not exist or is not writable
		# https://bugs.python.org/issue19891
		pass
		except OSError:
		if errno.EROFS:
		pass # gh-128066: read-only file system
		else:
		raise

		atexit.register(write_history)

Expand Down
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1,3 @@
		Fixes an edge case where PyREPL improperly threw an error when Python is
		invoked on a read only filesystem while trying to write history file
		entries.