# This function checks if the enemy is in your attack range.
def inAttackRange(enemy):
    distance = hero.distanceTo(enemy)
    # Almost all swords have attack range of 3.
    if distance <= 3:
        return True
    else:
        return False

# Attack ogres only when they're within reach.
while True:
    # Find the nearest enemy and store it in a variable.
    nearestEnemy = hero.findNearestEnemy()
    # Call inAttackRange(enemy), with the enemy as the argument
    # and save the result in the variable canAttack.
    canAttack = inAttackRange(nearestEnemy)
    # If the result stored in canAttack is True, then attack!
    if canAttack:
        hero.attack(nearestEnemy)