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[Alex Martelli]
> ...
> As I was checking that, I was struck by the fact that
> having "write-only" settings is quite an anomaly --
> e.g. it makes writing a function that sets the check
> interval to 0 temporarily, fiddles around a bit, then
> sets it back to the previous value, a bit of trouble.
>
> Now that the check interval is a global variable, is
> there any problem with making it readable (presumably
> with a new sys.getcheckinterval() function) as well as
> writable?
Write-only settings are indeed strange. We could add a new function, or
have setcheckinterval() return the old value.
The attached patch implements the former. Guido, do you object to adding
this to 2.3? I don't (the potential for breakage seems insignificant).
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Index: Doc/lib/libsys.tex
===================================================================
RCS file: /cvsroot/python/python/dist/src/Doc/lib/libsys.tex,v
retrieving revision 1.65
diff -c -r1.65 libsys.tex
*** Doc/lib/libsys.tex 2 Jul 2003 21:38:34 -0000 1.65
--- Doc/lib/libsys.tex 6 Jul 2003 18:21:43 -0000
***************
*** 197,202 ****
--- 197,207 ----
or when \code{os._exit()} is called.}
\end{datadesc}
+ \begin{funcdesc}{getcheckinterval}{}
+ Return the interpreter's ``check interval'';
+ see \function{setcheckinterval()}.
+ \end{funcdesc}
+
\begin{funcdesc}{getdefaultencoding}{}
Return the name of the current default string encoding used by the
Unicode implementation.
Index: Lib/test/test_sys.py
===================================================================
RCS file: /cvsroot/python/python/dist/src/Lib/test/test_sys.py,v
retrieving revision 1.7
diff -c -r1.7 test_sys.py
*** Lib/test/test_sys.py 1 May 2003 17:45:51 -0000 1.7
--- Lib/test/test_sys.py 6 Jul 2003 18:21:44 -0000
***************
*** 172,179 ****
def test_setcheckinterval(self):
self.assertRaises(TypeError, sys.setcheckinterval)
! sys.setcheckinterval(120)
! sys.setcheckinterval(100)
def test_recursionlimit(self):
self.assertRaises(TypeError, sys.getrecursionlimit, 42)
--- 172,181 ----
def test_setcheckinterval(self):
self.assertRaises(TypeError, sys.setcheckinterval)
! orig = sys.getcheckinterval()
! for n in 0, 100, 120, orig: # orig last to restore starting state
! sys.setcheckinterval(n)
! self.assertEquals(sys.getcheckinterval(), n)
def test_recursionlimit(self):
self.assertRaises(TypeError, sys.getrecursionlimit, 42)
Index: Misc/NEWS
===================================================================
RCS file: /cvsroot/python/python/dist/src/Misc/NEWS,v
retrieving revision 1.808
diff -c -r1.808 NEWS
*** Misc/NEWS 4 Jul 2003 04:40:44 -0000 1.808
--- Misc/NEWS 6 Jul 2003 18:21:46 -0000
***************
*** 10,15 ****
--- 10,18 ----
Core and builtins
-----------------
+ - The new function sys.getcheckinterval() returns the last value set
+ by sys.setcheckinterval().
+
- The Windows implementation of PyThread_start_new_thread() never
checked error returns from Windows functions correctly. As a result,
it could claim to start a new thread even when the Microsoft
Index: Python/sysmodule.c
===================================================================
RCS file: /cvsroot/python/python/dist/src/Python/sysmodule.c,v
retrieving revision 2.119
diff -c -r2.119 sysmodule.c
*** Python/sysmodule.c 10 May 2003 07:08:50 -0000 2.119
--- Python/sysmodule.c 6 Jul 2003 18:21:47 -0000
***************
*** 432,437 ****
--- 432,447 ----
);
static PyObject *
+ sys_getcheckinterval(PyObject *self, PyObject *args)
+ {
+ return PyInt_FromLong(_Py_CheckInterval);
+ }
+
+ PyDoc_STRVAR(getcheckinterval_doc,
+ "getcheckinterval() -> current check interval; see setcheckinterval()."
+ );
+
+ static PyObject *
sys_setrecursionlimit(PyObject *self, PyObject *args)
{
int new_limit;
***************
*** 723,728 ****
--- 733,740 ----
#endif
{"setcheckinterval", sys_setcheckinterval, METH_VARARGS,
setcheckinterval_doc},
+ {"getcheckinterval", sys_getcheckinterval, METH_NOARGS,
+ getcheckinterval_doc},
#ifdef HAVE_DLOPEN
{"setdlopenflags", sys_setdlopenflags, METH_VARARGS,
setdlopenflags_doc},
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