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6174 :: Accessing global variable inside proc results in Error: undeclared identifier

• MrKoops (orginal) [2020-04-08T11:30:19+02:00] view original

  Hi, coming from python i am new to Nim.

  I am using argparse package like this:

   p = newParser("tradl"):
      option("-l", "--language")
      option("-a", "--amount")
      option("-d", "--dir")
      option("-s", "--search")
  
  var opts = p.parse()
  Run

  in my understanding, opts should be a global variable, thus accessable in procedures. i am accesing opts in this procedure:

   dl(url: string): bool =
    try:
      var client = newHttpClient()
      let content = client.getContent(url)
      try:
        writefile(joinpath(opts.dir, filename), content)
      except IOError:
        log(lvlError,"Error writing file " & filename)
        return false
    except HttpRequestError:
      log(lvlError,"Error downloading " & item.title)
      return false
    return true
  Run

  This results in:

  : undeclared identifier 'opts'
  Run

  What am i doing wrong?

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• miran (orginal) [2020-04-08T12:22:08+02:00] view original

  coming from python i am new to Nim

  What am i doing wrong?

  Defining opts after your proc? (You can do that in Python, but not in Nim)

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• MrKoops (orginal) [2020-04-08T13:11:45+02:00] view original

  Thank you miran. Pascal is too long ago and i was dabbling to much in Python.

  I love Nim so far. It's the perfect combination of the easy python syntax and the flexibility of C. Now we have to create some of our favourite libraries (like Pendulum eg) for Nim :)

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