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gh-143412: Fix TypeError: _IOBase.readlines() takes no keyword arguments #143413

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gh-143412: Fix TypeError: _IOBase.readlines() takes no keyword arguments #143413

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gh-143412: Fix TypeError: _IOBase.readlines() takes no keyword arguments
RydertHuGlIfE Jan 4, 2026
9bf210d
📜 Add NEWS entry for gh-143412
RydertHuGlIfE Jan 4, 2026
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1 change: 1 addition & 0 deletions Include/internal/pycore_global_objects_fini_generated.h
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1 change: 1 addition & 0 deletions Include/internal/pycore_global_strings.h
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Original file line number Diff line number Diff line change
Expand Up @@ -513,6 +513,7 @@ struct _Py_global_strings {
STRUCT_FOR_ID(header)
STRUCT_FOR_ID(headers)
STRUCT_FOR_ID(hi)
STRUCT_FOR_ID(hint)
STRUCT_FOR_ID(hook)
STRUCT_FOR_ID(hour)
STRUCT_FOR_ID(hours)
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1 change: 1 addition & 0 deletions Include/internal/pycore_runtime_init_generated.h
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4 changes: 4 additions & 0 deletions Include/internal/pycore_unicodeobject_generated.h
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2 changes: 2 additions & 0 deletions Misc/NEWS.d/next/Library/2026-01-04-13-56-00.gh-issue-143412.RydertHuGlIfE.rst
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Original file line number Diff line number Diff line change
@@ -0,0 +1,2 @@
Allow passing ``hint`` and ``size`` as keyword arguments to
:meth:`io.IOBase.readlines` and :meth:`io.IOBase.readline` respectively.
93 changes: 78 additions & 15 deletions Modules/_io/clinic/iobase.c.h
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7 changes: 3 additions & 4 deletions Modules/_io/iobase.c
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Original file line number Diff line number Diff line change
Expand Up @@ -553,7 +553,6 @@ _io__IOBase_isatty_impl(PyObject *self)
/*[clinic input]
_io._IOBase.readline
size as limit: Py_ssize_t(accept={int, NoneType}) = -1
/

Read and return a line from the stream.

Expand All @@ -566,7 +565,7 @@ terminator(s) recognized.

static PyObject *
_io__IOBase_readline_impl(PyObject *self, Py_ssize_t limit)
/*[clinic end generated code: output=4479f79b58187840 input=d0c596794e877bff]*/
/*[clinic end generated code: output=4479f79b58187840 input=5ed037c83054bf41]*/
{
/* For backwards compatibility, a (slowish) readline(). */

Expand Down Expand Up @@ -703,7 +702,7 @@ iobase_iternext(PyObject *self)
/*[clinic input]
_io._IOBase.readlines
hint: Py_ssize_t(accept={int, NoneType}) = -1
/


Return a list of lines from the stream.

Expand All @@ -714,7 +713,7 @@ lines so far exceeds hint.

static PyObject *
_io__IOBase_readlines_impl(PyObject *self, Py_ssize_t hint)
/*[clinic end generated code: output=2f50421677fa3dea input=9400c786ea9dc416]*/
/*[clinic end generated code: output=2f50421677fa3dea input=ca109061c220173b]*/
{
Py_ssize_t length = 0;
PyObject *result, *it = NULL;
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