title: NameError: name 'form' is not defined (Python3)
body: <p>Basically the <code>main</code> method takes user input, checks it and calls the <code>first</code> method if the user doesn't enter <code>quit</code>.</p>
  
  <p>The <code>first</code> method checks the first section of the input and calls one of the other methods depending on what the user enters. This is the point I get an error; when the <code>first</code> method calls the <code>form</code> method, for example, I get an <code>NameError: name 'form' is not defined</code> exception. I'm a little confused about this since I've defined each method and they're all spelt correctly, also when I call the <code>quit</code> method it works perfectly fine.</p>
  
  <p>Main method: </p>
  
  <pre><code>if __name__ == '__main__':
          for line in sys.stdin:
                  s = line.strip()
                  if not s: break
                  if (str(s) == "quit"): quit()
                  elif (str(s) == "quit") == False:
                          a = s.split()
                          print(a)
                          if (len(a) is 2): first(a)
                          elif (len(a) is 3): first(a)
                          else: print("Invalid Input. Please Re-enter.")
  </code></pre>
  
  <p>First method:</p>
  
  <pre><code>def first(a = list()):
          word = a[0]
  
          if word == "ls":
                  ls(a[1])           
          elif word == "format":
                  form(a[1])
          elif word == "reconnect":
                  reconnect(a[1])
          elif word == "mkfile":
                  mkfile(a[1])
          elif word == "mkdir":
                  mkdir(a[1])
          elif word == "append":
                  append(a[1], a[2])                               
          elif word == "delfile":
                  delfile(a[1])
          elif word == "deldir":
                  deldir(a[1])
          else:
                  print("Invalid Prompt. Please Re-enter.")
  </code></pre>
  
  <p>Other methods (these are all called from the first method):</p>
  
  <pre><code>def reconnect(one = ""):
          print("Reconnect")
  
  def ls(one = ""):
          print("list")
  
  def mkfile(one = ""):
          print("make file")
  
  def mkdir(one = ""):
          print("make drive")
  
  def append(one = "", two = ""):
          print("append")
  
  def form(one = ""):
          print("format " + one)
  
  def delfile(one = ""):
          print("delete file")
  
  def deldir(one = ""):
          print("delete directory")
  
  def quit():
          print("quit")
          sys.exit(0)
  </code></pre>