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py: Allow keyword arguments for namedtuple

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stijn 2014-12-20 16:38:40 +01:00 committed by Paul Sokolovsky
parent 12340147b0
commit 021dc44009
2 changed files with 52 additions and 12 deletions
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34
py/objnamedtuple.c
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@ -89,9 +89,39 @@ STATIC mp_obj_t namedtuple_make_new(mp_obj_t type_in, mp_uint_t n_args, mp_uint_
// Counts include implicit "self" // Counts include implicit "self"
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError, nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError,
"__new__() takes %d positional arguments but %d were given", "__new__() takes %d positional arguments but %d were given",
num_fields + 1, n_args + 1)); num_fields + 1, n_args + n_kw + 1));
} }
mp_obj_tuple_t *tuple = mp_obj_new_tuple(n_args, args);
mp_obj_t *arg_objects;
if (n_args == num_fields) {
arg_objects = (mp_obj_t*)args;
} else {
size_t alloc_size = sizeof(mp_obj_t) * num_fields;
arg_objects = alloca(alloc_size);
memset(arg_objects, 0, alloc_size);
for (mp_uint_t i = 0; i < n_args; i++) {
arg_objects[i] = args[i];
}
for (mp_uint_t i = n_args; i < n_args + 2 * n_kw; i += 2) {
qstr kw = MP_OBJ_QSTR_VALUE(args[i]);
int id = namedtuple_find_field(type, kw);
if (id == -1) {
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError,
"__new__() got an unexpected keyword argument '%s'",
qstr_str(kw)));
}
if (arg_objects[id] != NULL) {
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError,
"__new__() got multiple values for argument '%s'",
qstr_str(kw)));
}
arg_objects[id] = args[i + 1];
}
}
mp_obj_tuple_t *tuple = mp_obj_new_tuple(num_fields, arg_objects);
tuple->base.type = type_in; tuple->base.type = type_in;
return tuple; return tuple;
} }

30
tests/basics/namedtuple1.py
View File

@ -6,19 +6,19 @@ except ImportError:
T = namedtuple("Tup", ["foo", "bar"]) T = namedtuple("Tup", ["foo", "bar"])
# CPython prints fully qualified name, what we don't bother to do so far # CPython prints fully qualified name, what we don't bother to do so far
#print(T) #print(T)
t = T(1, 2) for t in T(1, 2), T(bar=1, foo=2):
print(t) print(t)
print(t[0], t[1]) print(t[0], t[1])
print(t.foo, t.bar) print(t.foo, t.bar)
print(len(t)) print(len(t))
print(bool(t)) print(bool(t))
print(t + t) print(t + t)
print(t * 3) print(t * 3)
print([f for f in t]) print([f for f in t])
print(isinstance(t, tuple)) print(isinstance(t, tuple))
try: try:
t[0] = 200 t[0] = 200
@ -39,6 +39,16 @@ try:
except TypeError: except TypeError:
print("TypeError") print("TypeError")
try:
t = T(foo=1)
except TypeError:
print("TypeError")
try:
t = T(1, foo=1)
except TypeError:
print("TypeError")
# Try single string # Try single string
# Not implemented so far # Not implemented so far
#T3 = namedtuple("TupComma", "foo bar") #T3 = namedtuple("TupComma", "foo bar")