learn-co-students / 011121-python-fundamentals

Python Fundamentals

In this checkpoint, we will work with various Python data types and try to accomplish certain tasks using some Python fundamentals. Below, we've defined a dictionary with soccer player names as keys for nested dictionaries containing information about each players age, nationality, and a list of teams they have played for.

#Run this code without any changes
players = {
    'L. Messi': {
		'age': 31,
		'nationality': 'Argentina',
		'teams': ['Barcelona']
	},
	'Cristiano Ronaldo': {
		'age': 33,
		'nationality': 'Portugal',
		'teams': ['Juventus', 'Real Madrid', 'Manchester United']
	},
	'Neymar Jr': {
		'age': 26,
		'nationality': 'Brazil',
		'teams': ['Santos', 'Barcelona', 'Paris Saint-German']
	},
	'De Gea': {
		'age': 27,
		'nationality': 'Spain',
		'teams': ['Atletico Madrid', 'Manchester United']
	},
	'K. De Bruyne': {
		'age': 27,
		'nationality': 'Belgium',
		'teams': ['Chelsea', 'Manchester City']
	}
}

# __SOLUTION__ 
players = {
	'L. Messi': {
		'age': 31,
		'nationality': 'Argentina',
		'teams': ['Barcelona']
	},
	'Cristiano Ronaldo': {
		'age': 33,
		'nationality': 'Portugal',
		'teams': ['Juventus', 'Real Madrid', 'Manchester United']
	},
	'Neymar Jr': {
		'age': 26,
		'nationality': 'Brazil',
		'teams': ['Santos', 'Barcelona', 'Paris Saint-German']
	},
	'De Gea': {
		'age': 27,
		'nationality': 'Spain',
		'teams': ['Atletico Madrid', 'Manchester United']
	},
	'K. De Bruyne': {
		'age': 27,
		'nationality': 'Belgium',
		'teams': ['Chelsea', 'Manchester City']
	}
}

1) Create a list of all the keys in the players dictionary.

• Use python's documentation on dictionaries for help if needed.
• Store the list of player names in a variable called player_names to use in the next question.
• Print out player_names to make sure your code returns what you think it does!

# Copy this starter code below to use in your answer

player_names = None

print(player_names)

# __SOLUTION__ 
player_names = list(players.keys())

print(player_names)

2) Great! Now that we have each players name, let's use that information to create a list of tuples containing each player's name along with their nationality.

• Ex: [('L. Messi', 'Argentina'), ('Christiano Ronaldo', 'Portugal'), ...]
• Store the list in a variable called player_nationalities

# Copy this starter code below to use in your answer

player_nationalities = None


print(player_nationalities)

# __SOLUTION__ 
player_nationalities = [(name, players[name]['nationality']) for name in player_names]

print(player_nationalities)

3) Now, define a function called get_players_on_team that returns a list of the names of all the players who have played on a given team.

Your function should take two arguments:

• a dictionary of player information
• a string of the team you are trying to find the players for

Be sure that your function has a return statement.

# Copy the code below and use to help check your answer

players_on_manchester_united = get_players_on_team(players,'Manchester United')
print(players_on_manchester_united)
   

# __SOLUTION__ 
def get_players_on_team(dict_,team_name):
    player_list = []
    for player in dict_:
        if team_name in dict_[player]['teams']:
            player_list.append(player)
    return player_list

players_on_manchester_united = get_players_on_team(players,'Manchester United')
print(players_on_manchester_united)

['Cristiano Ronaldo', 'De Gea']