# 1203.py

for x in 6,: print x
# 6

# for x in 6: print x
# Causa un errore, perche' 6 senza la
# virgola non e' iterabile.

x=3,5,8,9
print x
# (3, 5, 8, 9)

y=(3,5,8,9)
print y
# (3, 5, 8, 9)

s=(7)
print s
# 7

t=(7,)
print t
# (7,)

z=(x)
print z
# (3, 5, 8, 9)

u=(x,)
print u
# ((3, 5, 8, 9),)

v=(x,y)
print v
# ((3, 5, 8, 9), (3, 5, 8, 9))

w=1,2,(3,4,5),6,7
print w
# (1, 2, (3, 4, 5), 6, 7)

vuota=()
print vuota
# ()

#######################################

x=3,5,8,9
print len(x)
# 4

for i in xrange(0,4): print x[i],
print
# 3 5 8 9

for a in x: print a,
# 3 5 8 9