Shell Simulator

'''
Shell-Simulator 0.0.2
by Felix Oesterreicher
07-07-2012
'''

dir=["home","felix"]  # directory to start with
x = ""

while True:

  # Set the working directory
  wd= ""
  if dir==[]:
    wd="/"
  else:
    for i in range(0,len(dir),1):
      wd+="/"+dir[i]

  # Get the command ( x - raw command , y - list of args )
  x= input (wd+"$ ")
  y= x.split()

  ''' the possible commands '''

  # exit
  if y[0]=="exit":
    break

  # cd
  elif y[0]=="cd":
    if len(y)<=1:
      dir=["home","felix"]
      continue
    if y[1][0]=="/":
      dir=y[1].split("/")
      del dir[0]
    elif y[1]=="..":
      if not dir==[]:
        del dir[-1]
    elif y[1]==".":
      pass
    else:
      dir.append(y[1])

  # pwd
  elif y[0]=="pwd":
    print(wd)

  # command not found
  else:
    print ("Command not found.")