New submission from Skip Montanaro:
Attached is a patch for py3k which adds a %f format code to its strftime
method. When included in a format string it expands to the number of
microseconds in the object. date, time and datetime objects all support
the format (though I'm not sure what, if anything, it means for date
objects).
I don't know how practical this is for time.strftime() level because the
inputs are all so excited about being ints. Still, if you wanted to
allow the seconds field to be a float and were willing to cast it to an
int where necessary and shadow struct tm with a pseudo-float-friendly
version of the same, you could probably smash it in there as well.
----------
components: Extension Modules
files: percent-f.diff
keywords: patch, py3k
messages: 55876
nosy: skip.montanaro
priority: normal
severity: normal
status: open
title: %f format for datetime objects
type: rfe
versions: Python 3.0
__________________________________
Tracker <[EMAIL PROTECTED]>
<http://bugs.python.org/issue1158>
__________________________________
Index: Modules/datetimemodule.c
===================================================================
--- Modules/datetimemodule.c (revision 58132)
+++ Modules/datetimemodule.c (working copy)
@@ -1177,6 +1177,15 @@
return NULL;
}
+static PyObject *
+make_freplacement(PyObject *object)
+{
+ char freplacement[7];
+ sprintf(freplacement, "%06d", TIME_GET_MICROSECOND(object));
+
+ return PyBytes_FromStringAndSize(freplacement, strlen(freplacement));
+}
+
/* I sure don't want to reproduce the strftime code from the time module,
* so this imports the module and calls it. All the hair is due to
* giving special meanings to the %z and %Z format codes via a preprocessing
@@ -1192,6 +1201,7 @@
PyObject *zreplacement = NULL; /* py string, replacement for %z */
PyObject *Zreplacement = NULL; /* py string, replacement for %Z */
+ PyObject *freplacement = NULL; /* py string, replacement for %f */
const char *pin;/* pointer to next char in input format */
Py_ssize_t flen;/* length of input format */
@@ -1243,7 +1253,7 @@
* a new format. Since computing the replacements for those codes
* is expensive, don't unless they're actually used.
*/
- totalnew = flen + 1; /* realistic if no %z/%Z */
+ totalnew = flen + 1; /* realistic if no %z/%Z/%f */
newfmt = PyBytes_FromStringAndSize(NULL, totalnew);
if (newfmt == NULL) goto Done;
pnew = PyBytes_AsString(newfmt);
@@ -1301,6 +1311,18 @@
ptoappend = PyBytes_AS_STRING(Zreplacement);
ntoappend = PyBytes_GET_SIZE(Zreplacement);
}
+ else if (ch == 'f') {
+ /* format microseconds */
+ if (freplacement == NULL) {
+ freplacement = make_freplacement(object);
+ if (freplacement == NULL)
+ goto Done;
+ }
+ assert(freplacement != NULL);
+ assert(PyBytes_Check(freplacement));
+ ptoappend = PyBytes_AS_STRING(freplacement);
+ ntoappend = PyBytes_GET_SIZE(freplacement);
+ }
else {
/* percent followed by neither z nor Z */
ptoappend = pin - 2;
@@ -1347,6 +1369,7 @@
Py_DECREF(time);
}
Done:
+ Py_XDECREF(freplacement);
Py_XDECREF(zreplacement);
Py_XDECREF(Zreplacement);
Py_XDECREF(newfmt);
@@ -3159,7 +3182,7 @@
{
char buf[100];
PyObject *result;
- int us = TIME_GET_MICROSECOND(self);;
+ int us = TIME_GET_MICROSECOND(self);
if (us)
result = PyUnicode_FromFormat("%02d:%02d:%02d.%06d",
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