Units and actions

Everything dynamic in StarCraft 2 is a unit. Walking creatures, buildings, and even mineral fields are all units. Units are passed you your async def on_step(self, state, iteration) method inside the state parameter, as state.units, which is a group of all known units in the game.

Unit groups

Unit group (sc2.units.Units) is an ordered set-like structure containing all units. Normal set operations (|, &, -) an be used with unit groups.

Properties

Name	Description
amount	Number of units in the group
empty	Is the group empty
exists	Is the group not empty

Unit selectors

Return a sinle unit

Name	Description
first	property The first unit in the group
random	property A random unit in the group
take(n)	Takes first n units in the group, or all if the group is smaller
random_of(other)	A random unit in the group, or other in case that the group is empty
closest_to(position)	The unit closest to position

Unit group selectors

Return a UnitGroup

Misc

Name	Description
take(n, True)	Takes first n units in the group (requires the group to contain at least that many units)
random_group_of(n)	A random subgroup of n units

Filters

Name	Description
filter(predicate)	Selects all units for which predicate returns True
closer_than(distance, position)	All units closer than distance to the position

Property filters

Name	Description
ready	Is ready (building done, unit fully spawned)
not_ready
noqueue	Command queue is empty
idle	No assigned action
owned	Owned by this player
enemy	Owned by opponent
structure	Is structure
not_structure
mineral_field	Is mineral field
vespene_geyser	Is vespene geyser

Sorting

Name	Description
prefer_idle	property Prefer idle units
prefer_close_to(position)	Prefer units closer to the position
sorted(keyfn, reverse=False)	Sorts units by keyfn

Units

A single unit (sc2.unit.Unit) has properties and actions (a.k.a. commands)

Properties

Name	Description
is_snapshot	Snapshot, a previously seen building
is_visible	Currently visible
alliance	Alliance status
is_mine	Owned by current player
is_enemy	Enemy-owned unit
tag	Unique integer identifier
owner_id	player_id of the owner
position	Current position
facing
radius
detect_range	How far this unit detects clocked or burrowed units
radar_range	How far this unit sees
build_progress	Build progress, range [0.0, 1.0]
is_ready	Build progress ready
cloak	Cloak status
is_blip	Detected by watch tower
is_powered	Some Protoss buildings must be in the power field to work
is_burrowed
is_flying
is_structure	Note: some structures can walk or fly
is_mineral_field
is_vespene_geyser
health	Current health
health_max	Max health
shield	Current shield
shield_max	Max shield
energy
mineral_contents	Amount of minerals
vespene_contents	Amount of vespene
is_selected
orders	Order queue
noqueue	Is the order queue empty
is_idle	No current action
name	Unit type name

Actions

Action returns a sc2.unit_command.UnitCommand. Note that actions are not executed by calling these methods, they just create the action that can be executed by await self.do(action) in your bot class.

All these methods take additional parameters: a (sometimes optional) target and a (fully optional) queue (defaulting to False). Target is required by some commands, and disallowed in others. It may be either point or unit when defined. If queue is True then the command is queued after the previous actions, otherwise it overrides the current action.

Name	Description
train(unit)	Train a new unit
build(unit)	Build a building
attack()	Attack
gather()	Gather a resource
move()	Move to
hold_position()	Hold position
stop()	Stop current action
(action)	__call__ Use the given ability