List of Dictionaries:Not getting expected output inspite of many checks-CodePudding

code to make 30 aliens,to add values in a list using append

alien = []
for alien_number in range(30):
    new_alien = {'color': 'green', 'points': 5, 'speed': 'slow'}
    aliens.append(new_alien)
print('The first 10 aliens are:')
print("\t")
for alien in aliens[:5]:
    if alien['color'] == 'green':
        alien['color'] = 'yellow'
        alien['points'] = 10
        alien['speed'] = 'medium'
    elif alien['color'] == 'yellow':
        alien['color'] = 'red'
        alien['points'] = 15
        alien['speed'] = 'fast'
# showing the first 10 aliens
for alien in aliens[:10]:
    print(alien)
print('....')
# to show how many aliens have been created
print("\n")
print(f'The total number of aliens are:{len(aliens)}')

Expected result which i wanted,Please help me what i have to do to get this result

The first 10 aliens are:    
{'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': 'yellow', 'points': 10, 'speed': 'medium'}
{'color': 'red', 'points': 15, 'speed': 'fast'}
{'color': 'red', 'points': 15, 'speed': 'fast'}
{'color': 'red', 'points': 15, 'speed': 'fast'}
{'color': 'red', 'points': 15, 'speed': 'fast'}
{'color': 'red', 'points': 15, 'speed': 'fast'}
....
The total number of aliens are:30

CodePudding user response：

You created an array with data that cannot fit under all conditions. you need to create other data for the rows between 5 and 10 in your table.

Also you didn't go through all the first 10 rows with this condition : for alien in aliens[:5]:

Correct also alien = [] to aliens = []

You can use this code to get your result :

aliens = []
for alien_number in range(30):
    if ( alien_number in range(5,10)):
        new_alien = {'color': 'yellow', 'points': 5, 'speed': 'slow'}
    else:
        new_alien = {'color': 'green', 'points': 5, 'speed': 'slow'}
    aliens.append(new_alien)
    
for alien in aliens[:10]:
    if alien['color']=='green':
        alien['color']='yellow'
        alien['points']=10
        alien['speed'] ='medium'
    elif alien['color']=='yellow':
        alien['color']='red'
        alien['points']=15
        alien['speed']='fast'
        
#showing the first 10 aliens
for alien in aliens[:10]:
    print(alien)
print('....')
#to show how many aliens have been created
print(f'The total number of aliens are:{len(aliens)}')

Output :

{'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': 'yellow', 'points': 10, 'speed': 'medium'}
{'color': 'red', 'points': 15, 'speed': 'fast'}
{'color': 'red', 'points': 15, 'speed': 'fast'}
{'color': 'red', 'points': 15, 'speed': 'fast'}
{'color': 'red', 'points': 15, 'speed': 'fast'}
{'color': 'red', 'points': 15, 'speed': 'fast'}
....
The total number of aliens are:30

CodePudding user response：

I think there is a typo in the first line of your code, where you have defined alien instead of aliens

aliens = []
for alien_number in range(30):
    new_alien = {'color': 'green', 'points': 5, 'speed': 'slow'}
    aliens.append(new_alien)
...