Python: Global name 'info' is not defined

Good morning, I really do not have so much experience programming in Python (I'm a student, really) what happens is the following: I have an assignment in which I must put into practice the use of linked lists, creating nodes.

And then that, I create the nodes with a class defined for them and I add values to them, but at the time of printing them I get the following error:

  

Traceback (Most recent call last): File "class.py", line 62, in    print (c.getInfo ()) File "class.py", line 24, in getInfo   return str (info.getTitle ()) NameError: Global Name 'info' is not   defined

The code is as follows:

class Nodo():
    def __init__(self,pos):
        siguiente = ''
        self.pos = pos
        elemento = ''
        info = NodoInfo(self.pos)

    def getSiguiente(self):
        return self.siguiente

    def setSiguiente(self,n):
        self.siguiente = n

    def getPos(self):
        return pos

    def setElemento(self,a):
         elemento = a

    def getElemento(self):
        return elemento

    def getInfo(self):
        return str(info.getTitulo())

class NodoInfo():
    def __init__(self,pos):
        self.titulo = "Numero de nodo: "+str(pos)
        self.desc = "Este nodo puede almacenar datos."
        self.detalle = "Especificamente, almacena datos de tipo Object (Amplio espectro de TDA's)."

    def getTitulo(self):
        return self.titulo

    def getDesc(self):
        return self.desc

    def getDetalle(self):
        return self.detalle

pos = 1
seguir = 1
n = Nodo(pos)
c = Nodo(pos)

x = raw_input("Ingrese su primer dato: ")
n.setElemento(x)
while(seguir):
    pos = pos + 1
    opc = raw_input("Desea ingresar otro dato? S/N ")
    if(opc == 'S'):
        a = Nodo(pos)
        n.setSiguiente(a)
        a.setElemento(raw_input("Ingrese el otro dato: "))
        if(c.getSiguiente==''):
            c=n
        n=a
    else:
        seguir = 0

for i in range (1,pos):
    print(c.getInfo())
    print("El nodo almacena: "+c.getElemento())

I would appreciate your help! =)