CODEWITHSUNDEEP
pythonlist
NewUser123
NewUser123

Reputation: 35

In Python, how do I create lists based on a user inputted number?

I want to create a classic card game in Python based on a users input. I want to ask them > players = int(input('How many players are playing? 2-4 '))

and depending if they say 2.

players = [[], []] will be created

but if they said 3

then players = [[], [], []] would be created

etc

so far all i can do is players [[], [], [], []] which means 4 players must always play the game??

Upvotes: 0

Views: 716

Answers (4)

Samuel LEMAITRE
Samuel LEMAITRE

Reputation: 1041

You can do something like this

players = [ [] for x in range(int(input('How many players are playing? 2-4 ')))]

players = int(input('How many players are playing? 2-4 '))
players = [[]] * players

Upvotes: 1

Farhan.K
Farhan.K

Reputation: 3485

You can use list comprehension:

players = [[] for i in range(int(input('How many players are playing? 2-4 ')))]

Output:

>>> players = [[] for i in range(int(input('How many players are playing? 2-4 ')))]
How many players are playing? 2-4 3
>>> players
[[], [], []]

Or you can use the * operator:

players = [[]] * int(input('How many players are playing? 2-4 '))

However, changing an element in the list when using second method would cause every sublist to change too. So for you the list comprehension method would be better.

E.g:

>>> players = [[]] * int(input('How many players are playing? 2-4 '))
How many players are playing? 2-4 3
>>> players
[[], [], []]
>>> players[1].append("hello")
>>> players
[['hello'], ['hello'], ['hello']]

Upvotes: 1

Steve
Steve

Reputation: 73

Just say:

vectorPlayers = []

players = int(input("'How many players are playing? 2-4 '"))

for x in range(players):
    vectorPlayers.append([])


print(vectorPlayers)

This will create a vector with an empty vector in every position

Upvotes: 0

C Panda
C Panda

Reputation: 3405

You could do,

n = input("number: ")    # n = 2 say
out = [list() for i in range(n)] # [[], []]

See if it works for you.

Upvotes: 1

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