You can define additional arguments in custom save method of model like this: class MyModel(models.Model): …. def save(self, *args, **kwargs): super(MyModel, self).save(*args, **kwargs) self.my_extra_param = ‘hello world’ And access this additional argument through instance in post_save signal receiver: @receiver(post_save, sender=MyModel) def process_my_param(sender, instance, *args, **kwargs): my_extra_param = instance.my_extra_param
If all these parameters are meaningfully related, pack them in a structure.
Definitely. void f(void (*a)()) { a(); } void test() { printf(“hello world\n”); } int main() { f(&test); return 0; }
See: http://www.postgresql.org/docs/9.1/static/arrays.html If your non-native driver still does not allow you to pass arrays, then you can: pass a string representation of an array (which your stored procedure can then parse into an array — see string_to_array) CREATE FUNCTION my_method(TEXT) RETURNS VOID AS $$ DECLARE ids INT[]; BEGIN ids = string_to_array($1,’,’); … END $$ LANGUAGE … Read more
Semantically, they are identical. However, I’d recommend using the latter syntax (String[] args) when declaring arrays. The former syntax is there mainly for compatibility with C syntax. Since String[], as a whole, is the type of the object in Java, it’s more consistent and clear not to split it up. A similar question addresses the … Read more
You can simply write name = “user” button.clicked.connect(lambda: calluser(name))
Since this answer was somehow accepted and thus will appear at the top, although it’s not the best, I’ve improved it based on the other answers and the comments. The C way; simplest, but will treat any invalid number as 0: #include <cstdlib> int x = atoi(argv[1]); The C way with input checking: #include <cstdlib> … Read more
1) I would recommend avoiding environmental variables as much as possible. Pros of environmental variables easy to use because they’re visible from anywhere. If lots of independent programs need a piece of information, this approach is a whole lot more convenient. Cons of environmental variables hard to use correctly because they’re visible (delete-able, set-able) from … Read more