>>> def pertenece(x,y,z):
	if x>=y and x<=z:
		return True
	else:
		return False

	
>>> def piedraPapelTijeras(x):
	if pertenece(x,1,3):
		if x==1: return "piedra"
		elif x==2: return "papel"
		elif x==3: return "tijeras"

	
>>> def ganador(x,y):
	if x==y: return 0
	elif (x=="tijeras" and y=="papel") or (x=="piedra" and y=="tijeras") or (x=="papel" and y=="piedra"): return 1
	elif (x=="piedra" and y=="papel") or (x=="papel" and y=="tijeras") or (x=="tijeras" and y=="piedra"): return 2

	
>>>  def producto(x,y):
	if x==0 or y==0: return 0
	else: return x + producto(x,y-1)

	
>>> def cociente(a,b):
	if a<b: return 0
	else: return 1 + cociente(a-b,b)

	
>>> def divisiones(a,b):
	if not b%a==0: return 0
	else: return 1 + divisiones(a/b,b)
	
>>> def dineroFinal(monto,interes,anios):
	if anios==0: return monto
	else: return (1 + interes/100.0)*dineroFinal(monto,interes,anios-1)

>>> def f(x,i):
	if i==1: return x
	else: return (((-1.0)*x**2)/((2*i-1)*(2*i-2)))*f(x,i-1)

>>> def suma(x,n):
	if n==0: return 0
	else: return f(x,n)+suma(x,n-1)

>>> def results(n=-4):
	if n>4: return
	else:
		print("x="+str(math.pi*(n/4.0))+" suma="+str(suma(math.pi*(n/4.0),15)))
		results(n+1)