Python hollow figures

I just need to know how I could turn these two figures (triangle and rhombus) into hollow figures, that is, only show their edges. my code is this:

def Rombo(n):

    l = [[' ' for x in range(n)] for z in range(n/2+1)]
    for e in range(n):
        for i in range(e,n-e):
            l[e][i] = '*'
    l = l[:0:-1]+l
    for i in l:
        print ' '.join(i)
#----------------------------------------------------------------------- 
def triangulo():
   for i in range(5):
      for j in range(i+1):
         print "4",
      print

#---------------------------------------------
def imprimirRombo(n):

   n = n//2
   for i in range(n,0,-1):
       for j in range(n,(n-(i+1)),-1):
           print ' ',
       for k in range(i+1,n+1):
           print '*',
       print
   for i in range(0,n):
      for j in range(n,(n-(i+1)),-1):
          print ' ',
      for k in range(i+1,n+1):
         print '*',
      print 

#------------------------------------------------------------ 
def Cuadrado(largo,ancho):

   for i in range(largo):
       if i in[0]:
           print("* "*(ancho))
       elif i in[(largo-1)]:
           print("* "*(ancho))
       else:
           print("*"+"*"*(ancho)+" *")
#------------------------------------------------------------ 
def Pintar_CuadradoG(largo,ancho):

   for i in range(largo):
       if i in[0]:
          print("* "*(ancho))
       elif i in[(largo-1)]:
          print("* "*(ancho))
       else:
          print("*"+"  "*(ancho)+" *")
#------------------------------------------------------------           
def Pintar_CuadradoP(largo,ancho):
   for i in range(largo):
      if i in[0]:
         print(" * "*(ancho+2))
      elif i in[(largo-1)]:
         print(" * "*(ancho+2))
      else:
         print(" * "+" 1 "*(ancho)+" * ")

#------------------------------------------------------------ 
def Opciones():
  op=0
  while op!=1 and op!=2 and op!=3 and op!=9:
     print
     print " Menu de opciones"
     print"-----------------------"
     print "[1] Rombo"
     print "[2] Cuadrado"
     print "[3] Rombo "
     print "[9] terminar la ejecucion"
     op = int(raw_input("ingrese opcion: "))
  return op  

#------------------------------------------------------------ 
#programa
opcion=Opciones()
while opcion!=9:
    if opcion==1:
       Rombo(21)
       input()
    elif opcion==2:
       print
       Cuadrado(6,6)
       print
       print
       print "|Colores|"
       print"-------------------------------------------"
       print"Rojo =1 , Amarillo=2, Morado = 3"
       print"-------------------------------------------"
       print"Seleccione el color y tamaño que desea: "
       print"1)Rojo-Grande"
       print"2)Amarillo-Grande"
       print"3)Morado-Grande"
       print"4)Rojo-Pequeño"
       print"5)Amarillo-Pequeño"
       print"6)Morado-Pequeño"
       eleccion=int(raw_input("Ingrese su decision: "))
       if eleccion ==1:
          Pintar_CuadradoG(10,10)
          input()
       elif eleccion == 2:
          Pintar_CuadradoG(10,10)
          input()
       elif eleccion == 3:
          Pintar_CuadradoG(10,10)
          input()
       elif eleccion == 4:
          Pintar_CuadradoP(4,4)
          input()
       elif eleccion == 5:
          Pintar_CuadradoP(4,4)
          input()
       elif eleccion == 6:
          Pintar_CuadradoP(4,4)
          input()
       else:
          print"Debe ingresar un numero valido en el menu"
    elif opcion ==3: 
       imprimirRombo(12)
       print
       print
       print "|Colores|"
       print"-------------------------------------------"
       print"Rojo =1 , Amarillo=2, Morado = 3"
       print"-------------------------------------------"
       print"Seleccione el color y tamaño que desea: "
       print"1)Rojo-Grande"
       print"2)Amarillo-Grande"
       print"3)Morado-Grande"
       print"4)Rojo-Pequeño"
       print"5)Amarillo-Pequeño"
       print"6)Morado-Pequeño"
       decision=int(raw_input("Ingrese su decision: "))
        if decision ==1:
          imprimirRombo(12)
          input()
        elif decision ==2:
          triangulo()
          input()
    else:
      print"Debe ingresar una opcion valida"
print 'Adios, nos vemos :3'

Originally they look like this:

and what I want is something like this:

New: I'm getting in the case of the rhombus but it stays with me ... help: (

 def imprimirRombo(n):
    espacio = n-1
    for x in xrange(1,n):
       for y in xrange(1,espacio):
           print ' ',
       print '*'  
       for z in xrange(2,2*x-2):
           print ' ',
       if (x > 1):           
           print '*'
       espacio = espacio -1
    espacio=1
    for x in xrange(1,n-1):
       for y in xrange(1,espacio):
           print ' ',
       print '*'   
       for z in xrange(2,2*(n-x)-2):
           print ' ',
       if (x < n-1):    
           print '*'
       espacio = espacio+1