def test_import_module_by_string():
with pytest.raises(ImportError):
import_string('not_existing')
m = import_string('.mod', 'pkg')
assert isinstance(m, types.ModuleType)
assert m.__name__ == 'pkg.mod'
def test_import_object_by_string():
answer = import_string('pkg.mod:answer')
assert answer == 42
widget = import_string('.mod:Widget', 'pkg')
assert isinstance(widget, type)
assert widget.__module__ == 'pkg.mod'
def test_import_default():
m = import_string('not_existing', default=None)
assert m is None
def init_app(self, app):
package = get_nearest_package_name(app.import_name)
func = import_string(self._path, package=package)
func(app)
