105 lines
3 KiB
C
105 lines
3 KiB
C
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/* future_builtins module */
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/* This module provides functions that will be builtins in Python 3.0,
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but that conflict with builtins that already exist in Python
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2.x. */
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#include "Python.h"
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PyDoc_STRVAR(module_doc,
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"This module provides functions that will be builtins in Python 3.0,\n\
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but that conflict with builtins that already exist in Python 2.x.\n\
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\n\
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Functions:\n\
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\n\
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ascii(arg) -- Returns the canonical string representation of an object.\n\
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filter(pred, iterable) -- Returns an iterator yielding those items of \n\
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iterable for which pred(item) is true.\n\
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hex(arg) -- Returns the hexadecimal representation of an integer.\n\
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map(func, *iterables) -- Returns an iterator that computes the function \n\
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using arguments from each of the iterables.\n\
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oct(arg) -- Returns the octal representation of an integer.\n\
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zip(iter1 [,iter2 [...]]) -- Returns a zip object whose .next() method \n\
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returns a tuple where the i-th element comes from the i-th iterable \n\
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argument.\n\
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\n\
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The typical usage of this module is to replace existing builtins in a\n\
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module's namespace:\n \n\
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from future_builtins import ascii, filter, map, hex, oct, zip\n");
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static PyObject *
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builtin_hex(PyObject *self, PyObject *v)
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{
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return PyNumber_ToBase(v, 16);
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}
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PyDoc_STRVAR(hex_doc,
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"hex(number) -> string\n\
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\n\
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Return the hexadecimal representation of an integer or long integer.");
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static PyObject *
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builtin_oct(PyObject *self, PyObject *v)
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{
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return PyNumber_ToBase(v, 8);
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}
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PyDoc_STRVAR(oct_doc,
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"oct(number) -> string\n\
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\n\
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Return the octal representation of an integer or long integer.");
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static PyObject *
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builtin_ascii(PyObject *self, PyObject *v)
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{
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return PyObject_Repr(v);
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}
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PyDoc_STRVAR(ascii_doc,
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"ascii(object) -> string\n\
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\n\
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Return the same as repr(). In Python 3.x, the repr() result will\n\
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contain printable characters unescaped, while the ascii() result\n\
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will have such characters backslash-escaped.");
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/* List of functions exported by this module */
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static PyMethodDef module_functions[] = {
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{"hex", builtin_hex, METH_O, hex_doc},
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{"oct", builtin_oct, METH_O, oct_doc},
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{"ascii", builtin_ascii, METH_O, ascii_doc},
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{NULL, NULL} /* Sentinel */
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};
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/* Initialize this module. */
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PyMODINIT_FUNC
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initfuture_builtins(void)
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{
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PyObject *m, *itertools, *iter_func;
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char *it_funcs[] = {"imap", "ifilter", "izip", NULL};
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char **cur_func;
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m = Py_InitModule3("future_builtins", module_functions, module_doc);
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if (m == NULL)
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return;
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itertools = PyImport_ImportModuleNoBlock("itertools");
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if (itertools == NULL)
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return;
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/* If anything in the following loop fails, we fall through. */
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for (cur_func = it_funcs; *cur_func; ++cur_func){
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iter_func = PyObject_GetAttrString(itertools, *cur_func);
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if (iter_func == NULL ||
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PyModule_AddObject(m, *cur_func+1, iter_func) < 0)
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break;
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}
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Py_DECREF(itertools);
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/* any other initialization needed */
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}
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