如何从21个唯一值列表中获得3个唯一值列表？

Question

I'm doing the basic Python card trick and what I've searched for is too complicated, here's my code:

import random
import itertools
deck = ["S A","S 2","S 3","S 4","S 5","S 6","S 7","D A","D 2","D 3","D 4","D 
5","D 6","D 7","C A","C 2","C 3","C 4","C 5","C 6","C 7"]
random.shuffle(deck)
for z in range(3):
    print("Pile ",[z+1])
    for i in range(7):
        print(deck[i])

What I am trying to do is get it so when I get my 3 piles, I don't want any duplicate values but I can't work out how I do it, or how I get them in 3 separate columns?

Answer 1

use

piles=[deck[0::3],deck[1::3],deck[2::3]]

this build 3 lists starting at position 0, 1 and 2 respectively, jumping from item to item with a length of 3. no need to know the size of the initial list.

• first picks up items 0, 3, 6, ...
• second picks up items 1, 4, 7, ...
• third picks up items 2, 5, 8, ...

Answer 2

Slight modification in your code.

n = 0     # starting index of pile 1
for i in range(3):
    print("Pile ",[i+1])
    for j in range(n,n+7):
        print(deck[j])
    n = n+7     # update the index to next pile

Answer 3

Try this:

import random

deck = ["S A","S 2","S 3","S 4","S 5","S 6","S 7","D A","D 2","D 3","D 4","D 5","D 6","D 7","C A","C 2","C 3","C 4","C 5","C 6","C 7"]
data = {}
for i in range(3):
    data[i] = []
    for j in range(7):
        data[i].append(deck.pop(random.randint(0,len(deck)-1)))
print(data)

Answer 4

Randex! I did not quite get the idea of making 3 columns, as you asked in your question, but this is what you may find useful:

import random

deck = [
  "S A", "S 2", "S 3", "S 4", "S 5", "S 6", "S 7",
  "D A", "D 2", "D 3", "D 4", "D 5", "D 6", "D 7",
  "C A", "C 2", "C 3", "C 4", "C 5", "C 6", "C 7"
  ]

hands = {}

for stack in range(3):
  hands[stack] = []

You may also assign a randomly generated value to later on .append() and then remove from the list for more code readability

  for card in range(7):
    hands[stack].append(deck.pop(random.randint(0, len(deck) - 1)))

The "hands" will be assigned with a random card from the deck, until every "hand" has 7 cards stacked

for stack in hands:
  print(stack, '-', hands[stack])