Added dict.fromkeys. Are we done with dict and #99 yet? I do think we are.
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21
py/builtin.c
21
py/builtin.c
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@ -166,25 +166,12 @@ static mp_obj_t mp_builtin_iter(mp_obj_t o_in) {
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MP_DEFINE_CONST_FUN_OBJ_1(mp_builtin_iter_obj, mp_builtin_iter);
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mp_obj_t mp_builtin_len(mp_obj_t o_in) {
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mp_small_int_t len = 0;
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if (MP_OBJ_IS_TYPE(o_in, &str_type)) {
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len = strlen(qstr_str(mp_obj_str_get(o_in)));
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} else if (MP_OBJ_IS_TYPE(o_in, &tuple_type)) {
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uint seq_len;
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mp_obj_t *seq_items;
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mp_obj_tuple_get(o_in, &seq_len, &seq_items);
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len = seq_len;
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} else if (MP_OBJ_IS_TYPE(o_in, &list_type)) {
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uint seq_len;
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mp_obj_t *seq_items;
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mp_obj_list_get(o_in, &seq_len, &seq_items);
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len = seq_len;
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} else if (MP_OBJ_IS_TYPE(o_in, &dict_type)) {
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len = mp_obj_dict_len(o_in);
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} else {
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mp_obj_t len = mp_obj_len_maybe(o_in);
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if (len == NULL) {
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nlr_jump(mp_obj_new_exception_msg_varg(MP_QSTR_TypeError, "object of type '%s' has no len()", mp_obj_get_type_str(o_in)));
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} else {
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return len;
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}
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return MP_OBJ_NEW_SMALL_INT(len);
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}
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mp_obj_t mp_builtin_max(int n_args, const mp_obj_t *args) {
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24
py/obj.c
24
py/obj.c
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@ -2,6 +2,7 @@
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#include <stdlib.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include <string.h>
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#include <assert.h>
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#include "nlr.h"
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@ -227,3 +228,26 @@ uint mp_get_index(const mp_obj_type_t *type, machine_uint_t len, mp_obj_t index)
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nlr_jump(mp_obj_new_exception_msg_varg(MP_QSTR_TypeError, "%s indices must be integers, not %s", type->name, mp_obj_get_type_str(index)));
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}
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}
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// may return NULL
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mp_obj_t mp_obj_len_maybe(mp_obj_t o_in) {
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mp_small_int_t len = 0;
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if (MP_OBJ_IS_TYPE(o_in, &str_type)) {
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len = strlen(qstr_str(mp_obj_str_get(o_in)));
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} else if (MP_OBJ_IS_TYPE(o_in, &tuple_type)) {
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uint seq_len;
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mp_obj_t *seq_items;
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mp_obj_tuple_get(o_in, &seq_len, &seq_items);
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len = seq_len;
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} else if (MP_OBJ_IS_TYPE(o_in, &list_type)) {
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uint seq_len;
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mp_obj_t *seq_items;
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mp_obj_list_get(o_in, &seq_len, &seq_items);
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len = seq_len;
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} else if (MP_OBJ_IS_TYPE(o_in, &dict_type)) {
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len = mp_obj_dict_len(o_in);
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} else {
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return NULL;
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}
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return MP_OBJ_NEW_SMALL_INT(len);
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}
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1
py/obj.h
1
py/obj.h
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@ -234,6 +234,7 @@ void mp_obj_get_complex(mp_obj_t self_in, mp_float_t *real, mp_float_t *imag);
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qstr mp_obj_get_qstr(mp_obj_t arg);
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mp_obj_t *mp_obj_get_array_fixed_n(mp_obj_t o, machine_int_t n);
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uint mp_get_index(const mp_obj_type_t *type, machine_uint_t len, mp_obj_t index);
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mp_obj_t mp_obj_len_maybe(mp_obj_t o_in); /* may return NULL */
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// none
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extern const mp_obj_type_t none_type;
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57
py/objdict.c
57
py/objdict.c
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@ -376,6 +376,61 @@ static mp_obj_t dict_values(mp_obj_t self_in) {
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}
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static MP_DEFINE_CONST_FUN_OBJ_1(dict_values_obj, dict_values);
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/******************************************************************************/
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/* dict metaclass */
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static mp_obj_t dict_fromkeys(int n_args, const mp_obj_t *args) {
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assert(2 <= n_args && n_args <= 3);
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mp_obj_t iter = rt_getiter(args[1]);
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mp_obj_t len = mp_obj_len_maybe(iter);
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mp_obj_t value = mp_const_none;
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mp_obj_t next = NULL;
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mp_obj_dict_t *self = NULL;
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if (n_args > 2) {
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value = args[2];
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}
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if (len == NULL) {
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/* object's type doesn't have a __len__ slot */
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self = mp_obj_new_dict(0);
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} else {
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self = mp_obj_new_dict(MP_OBJ_SMALL_INT_VALUE(len));
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}
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while ((next = rt_iternext(iter)) != mp_const_stop_iteration) {
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mp_map_lookup(&self->map, next, MP_MAP_LOOKUP_ADD_IF_NOT_FOUND)->value = value;
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}
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return self;
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}
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static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(dict_fromkeys_obj, 2, 3, dict_fromkeys);
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static const mp_method_t dict_class_methods[] = {
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{ "fromkeys", &dict_fromkeys_obj },
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{ NULL, NULL }, // end-of-list sentinel
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};
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/* this should be unnecessary when inheritance works */
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static void dict_class_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t self_in) {
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print(env, "<class 'dict'>");
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}
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/* this should be unnecessary when inheritance works */
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static mp_obj_t dict_class_call_n(mp_obj_t self_in, int n_args, const mp_obj_t *args) {
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return rt_build_map(0);
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}
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static const mp_obj_type_t dict_class = {
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{ &mp_const_type },
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"dict_class",
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.print = dict_class_print,
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.methods = dict_class_methods,
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.call_n = dict_class_call_n,
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};
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/******************************************************************************/
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/* dict constructors & etc */
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@ -394,7 +449,7 @@ static const mp_method_t dict_type_methods[] = {
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};
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const mp_obj_type_t dict_type = {
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{ &mp_const_type },
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{ &dict_class },
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"dict",
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.print = dict_print,
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.make_new = dict_make_new,
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@ -0,0 +1,10 @@
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d = dict.fromkeys([1, 2, 3, 4])
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l = list(d.keys())
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l.sort()
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print(l)
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d = dict.fromkeys([1, 2, 3, 4], 42)
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l = list(d.values())
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l.sort()
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print(l)
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