Sublist into String Python

Question

I have a little problem , I have this code and I need to convert the final print to a string, to be able to printthe final results in different lines and change the separator "," to a "+". If someone could help me to fix this I will be grateful :D.

Thks in advance ^^.

Ex.:

Input: 7

Output:

5 + 2

5 + 1 + 1

2 + 2 + 2 + 1

2 + 2 + 1 + 1 + 1

2 + 1 + 1 + 1 + 1 + 1

1 + 1 + 1 + 1 + 1 + 1 + 1

Code:

def change(coins, amount)
      res = []
      def getchange(end, remain, cur_result):
        if end < 0: return
        if remain == 0:
            res.append(cur_result)
            return
        if remain >= coins[end]:
            getchange(end, remain - coins[end], cur_result + [coins[end]])
        getchange(end - 1, remain, cur_result)
    
     getchange(len(coins) - 1, amount, [])
     return res

q = int(input("Write your change: "))
st = change([1, 2, 5, 10], q)
print(st)

Please show the output of the current code and what you would like it to look like — Mister Mak, Apr 23 '21 at 18:30
I don't think that the function is needed for this example. Isn't this a question of changing a list such as `[1, 2, 3]` to `1 + 2 + 3`? — tdelaney, Apr 23 '21 at 18:35
@tdelaney No, I believe the OP just wants to print the output of the function in a more user-friendly way. — M-Chen-3, Apr 23 '21 at 18:36
@M-Chen-3 Right. So you'd say that the function is an unnecessary distraction too? — tdelaney, Apr 23 '21 at 18:38
@tdelaney Unnecessary, yes, but likely part of his assignment. — M-Chen-3, Apr 23 '21 at 18:38
@M-Chen-3 - But its not needed for this question. That's the point. We want minimally reproducible examples so that questions are more generally useful for people searching for the tricks of the trade. — tdelaney, Apr 23 '21 at 18:39

score 3 · Accepted Answer · edited Apr 23 '21 at 18:39

3

change your last line code from print(st) to

for s in st:
    print('+'.join((map(str,s))))

edited Apr 23 '21 at 18:39

M-Chen-3

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answered Apr 23 '21 at 18:34

Bing Wang

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Bro, how you controled hahaha it works perfectly, thank you <3 – Santiago Pérez Apr 23 '21 at 18:36
Or, if you want spaces between each character, you can do `print(' + '.join((map(str,s))))` instead. – M-Chen-3 Apr 23 '21 at 18:36

score 3 · Answer 2 · answered Apr 23 '21 at 18:37

3

If st is a list of integers, you can change it to

print(" + ".join(str(s) for s in st))

Generators and comprehensions are generally preferred to the map operation.

answered Apr 23 '21 at 18:37

tdelaney

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Sublist into String Python

2 Answers2