#!/usr/bin/env python
# -*- coding: latin-1 -*-
import calcule
i = True

while i:
usernumber = int(input('Introduce un número >>'))
if usernumber <= 0:
print ('Debe ser un numero más grande o igual a 1')
elif usernumber > 65535:
print ('Debe ser un numero mas pequeño que 65536')
else:
print (calcule.func(usernumber))

#!/usr/bin/env python
# -*- coding: latin-1 -*-
def func(usernumber):
r=[]
re=[]
i=True

while i:
vr= int(usernumber // 16.)
vre=(usernumber-(vr*16))
usernumber=vr
r.append(vr)
re.append(vre)
if vr >= 16:
vr=0
vre=0
else:
i= False
last = len(r)
k = re[0]
re.reverse()
x=re[0]

f = len(re)
y=0
while y <= f-1:
if re[y]==10:
re[y]='A'
elif re[y]==11:
re[y]='B'
elif re[y]==12:
re[y]='C'
elif re[y]==13:
re[y]='D'
elif re[y]==14:
re[y]='E'
elif re[y]==15:
re[y]='F'
y = y + 1

last = len(r)
if last ==1:
    last = 0
    if r[last] ==10:
r[last]='A'
    elif r[last] ==11:
r[last]='B'
    elif r[last] ==12:
r[last]='C'
    elif r[last] ==13:
r[last]='D'
    elif r[last] ==14:
r[last]='E'
    elif r[last] ==15:
r[last]='F'
else:
    last = last -1

if r[last] ==10:
r[last]='A'
elif r[last] ==11:
r[last]='B'
elif r[last] ==12:
r[last]='C'
elif r[last] ==13:
r[last]='D'
elif r[last] ==14:
r[last]='E'
elif r[last] ==15:
r[last]='F'
string = ''
e = 0
while e < f:
string = string + str(re[e])
e = e + 1
last= last-1
result = (str(r[last])+(string))

return result