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builtinimport: Add basic support for namespace packages. 

That was easy - just avoid erroring out on seeing candidate dir for namespace
package. That's far from being complete though - namespace packages should
support importing portions of package from different sys.path entries, here
we require first matching entry to contain all namespace package's portions.

And yet, that's a way to put parts of the same Python package into multiple
installable package - something we really need for *Micro*Python.
This commit is contained in:
Paul Sokolovsky 2014-04-15 01:23:40 +03:00
parent 75ffcaeace
commit a5854d2bc5
1 changed files with 3 additions and 4 deletions
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7
py/builtinimport.c
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@ -292,11 +292,10 @@ mp_obj_t mp_builtin___import__(uint n_args, mp_obj_t *args) {
vstr_add_str(&path, "__init__.py");
if (mp_import_stat(vstr_str(&path)) != MP_IMPORT_STAT_FILE) {
vstr_cut_tail_bytes(&path, sizeof("/__init__.py") - 1); // cut off /__init__.py
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ImportError,
"Per PEP-420 a dir without __init__.py (%s) is a namespace package; "
"namespace packages are not supported", vstr_str(&path)));
printf("Notice: %s is imported as namespace package\n", vstr_str(&path));
} else {
do_load(module_obj, &path);
}
do_load(module_obj, &path);
vstr_cut_tail_bytes(&path, sizeof("/__init__.py") - 1); // cut off /__init__.py
// https://docs.python.org/3.3/reference/import.html
// "Specifically, any module that contains a __path__ attribute is considered a package."