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I have a list which should contain string with a particular format or character i.e. {{str(x), str(y)},{str(x), str(y)}}. I tried to do string concat like: "{{"+str(x), str(y)+"},{"+str(x), str(y)+"}}" and append to list, but it gets surrounded by brackets: [({{str(x), str(y)}),({str(x), str(y)}})] How can I get rid of the brackets or betterstill, is there a better approach to having a list without brackets like this: [{{string, string},{string, string}}]

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  • Those braces; you heard about sets? Commented Sep 20, 2016 at 14:39

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The parentheses are because you're creating a tuple of three items:

  • "{{"+str(x)
  • str(y)+"},{"+str(x)
  • str(y)+"}}"

Try replacing those bare commas between str(x) and str(y) with +","+:

"{{"+str(x)+","+str(y)+"},{"+str(x)+","str(y)+"}}"
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