aliens = []
for aliens_number in range(30):
new_aluen = {'color':'green','points':5,'speed':'slow'}
aliens.append(new_aluen)
print (aliens[:1])
for alien in aliens[:3]:
if alien['color'] == 'green':
alien['color'] = 'yellow'
alien['speed'] = 'medium'
alien['points'] = 10
print (alien,end = '\n')
print (aliens,end = '\n')
-----------------------------
[{'color': 'green', 'points': 5, 'speed': 'slow'}]
{'color': 'yellow', 'points': 10, 'speed': 'medium'}
[{'color': 'yellow', 'points': 10, 'speed': 'medium'}, {'color': 'yellow', 'points': 10, 'speed': 'medium'}, {'color': 'yellow', 'points': 10, 'speed': 'medium'}, {'color': 'green', 'points': 5, 'speed': 'slow'}, {'color': 'green', 'points': 5, 'speed': 'slow'}, {'color': 'green', 'points': 5, 'speed': 'slow'}, {'color': 'green', 'points': 5, 'speed': 'slow'}, {'color': 'green', 'points': 5, 'speed': 'slow'}, {'color': 'green', 'points': 5, 'speed': 'slow'}, {'color': 'green', 'points': 5, 'speed': 'slow'}, {'color': 'green', 'points': 5, 'speed': 'slow'}, {'color': 'green', 'points': 5, 'speed': 'slow'}, {'color': 'green', 'points': 5, 'speed': 'slow'}, {'color': 'green', 'points': 5, 'speed': 'slow'}, {'color': 'green', 'points': 5, 'speed': 'slow'}, {'color': 'green', 'points': 5, 'speed': 'slow'}, {'color': 'green', 'points': 5, 'speed': 'slow'}, {'color': 'green', 'points': 5, 'speed': 'slow'}, {'color': 'green', 'points': 5, 'speed': 'slow'}, {'color': 'green', 'points': 5, 'speed': 'slow'}, {'color': 'green', 'points': 5, 'speed': 'slow'}, {'color': 'green', 'points': 5, 'speed': 'slow'}, {'color': 'green', 'points': 5, 'speed': 'slow'}, {'color': 'green', 'points': 5, 'speed': 'slow'}, {'color': 'green', 'points': 5, 'speed': 'slow'}, {'color': 'green', 'points': 5, 'speed': 'slow'}, {'color': 'green', 'points': 5, 'speed': 'slow'}, {'color': 'green', 'points': 5, 'speed': 'slow'}, {'color': 'green', 'points': 5, 'speed': 'slow'}, {'color': 'green', 'points': 5, 'speed': 'slow'}]