编辑“模组创作教程”（章节）

==== is_triggered_only ====
As a general rule every event should have <code>is_triggered_only = yes</code> declared. This makes game not checking the event until it is specifically called by an effect or on_action. Below is a code for the second tutmod event (should be written in <code>\events\tutmod_events.txt</code>):
<syntaxhighlight lang="py">
# Removes military fleets, grants science ship and scientist.
# Scopes:
# Scope: root: country this: country
country_event = {
	id = tutmod.2
	hide_window = yes
	is_triggered_only = yes	# Fire only when called from elsewhere.
	trigger = {
		has_civic = tutmod_civic		# Must have tutmod_civic civic.
	}
	immediate = {
		every_owned_fleet = {
			# Iterate through every owned fleet of THIS country.
			limit = {
				is_ship_class = shipclass_military # only fleets meeting shipclass_military criteria
			}
			delete_fleet = {
				target = this				# Delete THIS fleet.
				kill_leader = no			# Do not delete leader of THIS fleet (unassigns).
			}
		}
		create_leader = {
			# Create leader for THIS country.
			class = scientist # Specified scientist class.
			species = this # Where THIS is the scope of where effect was written in (country, therefore species will be main country species).
		}
		create_fleet = {
			# Create fleet for THIS country.
			effect = {
				# Execute list of effects for THIS fleet.
				set_owner = prev # Set owner of THIS fleet to PREV (PREV/previous scope being country we in previous brackets refered to as THIS).
				create_ship = {
					# Create ship for THIS fleet.
					random_existing_design = science # of random design which is science ship.
					graphical_culture = owner # Visual style of the ship is the same as OWNER of the fleet (can use PREV here).
				}
				set_location = {
					target = owner.capital_scope.solar_system.starbase # Set location of the fleet to owner's capital_scope's solar_system's starbase.
					# distance = 0
					# angle = random
					# direction = out_system
				}
				assign_leader = last_created_leader # Assigns last created leader to the fleet.
			}
		}
	}
}
</syntaxhighlight>

Code is more readable in VSCode.

This event has only one trigger which checks if the country <code>has_civic = tutmod_civic</code>.

There are several effects in the immediate section. Most of them are self-explanatory. All of them are listed on [https://github.com/OldEnt/stellaris-triggers-modifiers-effects-list the effects list] and it is worth reviewing them.