Mercurial > cpython-lru_cache-weakref
diff Python/exceptions.c @ 17597:32e7d0898eab legacy-trunk
Iterators phase 1. This comprises:
new slot tp_iter in type object, plus new flag Py_TPFLAGS_HAVE_ITER
new C API PyObject_GetIter(), calls tp_iter
new builtin iter(), with two forms: iter(obj), and iter(function, sentinel)
new internal object types iterobject and calliterobject
new exception StopIteration
new opcodes for "for" loops, GET_ITER and FOR_ITER (also supported by dis.py)
new magic number for .pyc files
new special method for instances: __iter__() returns an iterator
iteration over dictionaries: "for x in dict" iterates over the keys
iteration over files: "for x in file" iterates over lines
TODO:
documentation
test suite
decide whether to use a different way to spell iter(function, sentinal)
decide whether "for key in dict" is a good idea
use iterators in map/filter/reduce, min/max, and elsewhere (in/not in?)
speed tuning (make next() a slot tp_next???)
| author | Guido van Rossum <guido@python.org> |
|---|---|
| date | Fri, 20 Apr 2001 19:13:02 +0000 |
| parents | f939ce52a734 |
| children | 09df3254b49d |
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--- a/Python/exceptions.c Fri Apr 20 19:04:55 2001 +0000 +++ b/Python/exceptions.c Fri Apr 20 19:13:02 2001 +0000 @@ -52,6 +52,7 @@ Exception\n\ |\n\ +-- SystemExit\n\ + +-- StopIteration\n\ +-- StandardError\n\ | |\n\ | +-- KeyboardInterrupt\n\ @@ -369,6 +370,9 @@ static char TypeError__doc__[] = "Inappropriate argument type."; +static char +StopIteration__doc__[] = "Signal the end from iterator.next()."; + static char @@ -924,6 +928,7 @@ /* Global C API defined exceptions */ PyObject *PyExc_Exception; +PyObject *PyExc_StopIteration; PyObject *PyExc_StandardError; PyObject *PyExc_ArithmeticError; PyObject *PyExc_LookupError; @@ -985,6 +990,8 @@ * The first three classes MUST appear in exactly this order */ {"Exception", &PyExc_Exception}, + {"StopIteration", &PyExc_StopIteration, &PyExc_Exception, + StopIteration__doc__}, {"StandardError", &PyExc_StandardError, &PyExc_Exception, StandardError__doc__}, {"TypeError", &PyExc_TypeError, 0, TypeError__doc__},