Lists and Strings PYTHON - beginner

Question

I am having issues with formatting and understand lists and strings when it comes to classes. So I have this code here:

class User:
    def __init__(self,title):
        self.tile=tile
        self.rank={}

    def addCard(self,compID,number):
        if compID in self.cards and number > self.cards[compID]:
            self.cards[compID]=number
        elif compID not in self.cards:
            self.cards[compID]=number   

    def __str__(self):
        self.cardList = []
        for compID, number in self.cards.items():
            final = compID + "-" + str(number)
            self.cardList.append(temp)
            self.cardList.sort()
        return self.tile + ":" + " " + "Card scores:" + str(self.cardList)

so my result looks like this:

OUTPUT 1:
Cpt.Fred: Card scores: ['diamond-22', 'hearts-4', 'spades-3']
Lt.Connor: Card scores: ['diamond-43']

I am trying to make my result look like this:

OUTPUT 2:
Cpt.Fred: Card scores: [ diamond-22, hearts-4, spades-3 ]
Lt.Connor: Card scores: [ diamond-43 ]

The data is not whats important, its how to get rid of the " ' " at the beginning and the end of the results. I think it has something to do with my last def() statement but I have been trying to format it every way with no luck. Can anyone help turn the first output to look like the second output?

I think you're going to have to do some manual list parsing to get it to print how you want. I don't know how to remove those quotes from strings in lists. — TheSoundDefense
– TheSoundDefense, Commented Jul 18, 2014 at 18:08
possible duplicate of Remove single quotes from python list item — Padraic Cunningham
– Padraic Cunningham, Commented Jul 18, 2014 at 18:13
not duplicate: linked question asks for type casting elements of a list, this one is about str vs repr — metaperture
– metaperture, Commented Jul 18, 2014 at 18:16
@metaperture, it has nothing to do with casting it is how to remove single quotes from a python list item — Padraic Cunningham
– Padraic Cunningham, Commented Jul 18, 2014 at 18:29
All answers (including the accepted answer) do type casting. There's only a single line on the page about string joins. "Remove single quotes" is the name of the question but apparently everyone took it to mean "convert strs to ints". — metaperture
– metaperture, Commented Jul 18, 2014 at 18:33

metaperture · Accepted Answer · 2014-07-18 18:12:18Z

3

Instead of calling str(self.cardList), you should do:

return "%s: Card scores: [%s]" % (self.title, ", ".join(self.cardList))

The problem is that str on a list calls repr (includes quotes) on the list's elements, whereas you just want the str of the elements joined by commas.

answered Jul 18, 2014 at 18:12

metaperture

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TheSoundDefense · Accepted Answer · 2014-07-18 18:12:25Z

0

You may need to process and print the list manually. Here's one way you could do that.

def printList(cardlist):
  printstr = "["                   # Start with [.
  for card in cardlist:
    printstr += card + ", "        "card, "
  printstr = printstr[:-2] + "]"   # Remove the last ", " before adding the last ].

answered Jul 18, 2014 at 18:12

TheSoundDefense

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1 Comment

Ben Over a year ago

your for loop can instead be ', '.join(cardlist)

Daniel Kogan · Accepted Answer · 2014-07-18 18:14:58Z

0

The problem is in "str(self.cardList)". It prints out the list as is, meaning it puts strings into quotations to distinguished them from numbers and other objects.

def list_to_string(some_list):
    str = "["
    for i in range(len(some_list)):
        str += some_list[i]
        if i < len(some_list)-1:
            str += ", "
    str += "]"
    return str

this would parse your list into a string without the quotations

answered Jul 18, 2014 at 18:14

Daniel Kogan

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