# 0616.py

print (type(77))
# <class 'int'>
print (isinstance(77,int))
# True

print (type([3,5,1]))
# <class 'list'>
print (isinstance([3,5,1],tuple))
# False
print (isinstance([3,5,1],(tuple,list)))
# True

print (type('alfa'))
# <class 'str'>

def f(x): pass
print (type(f))
# <class 'function'>

class vettore (list):
  def __init__(A,x,y,z): A(x,y,z)
  def __call__(A,x,y,z): A.extend([x,y,z])
  def __add__(A,B):
    (x,y,z)=A; (u,v,w)=B; return vettore(x+u,y+v,z+w)
  def __mul__(A,t): (x,y,z)=A; return vettore(t*x,t*y,t*z)
  def __rmul__(A,t): return A*t
  def __mod__ (A,B): # prodotto scalare.
    (x,y,z)=A; (u,v,w)=B; return x*u+y*v+z*w
  def __and__ (A,B): # prodotto vettoriale.
    (x,y,z)=A; (u,v,w)=B
    return vettore(y*w-z*v,z*u-x*w,x*v-y*u)
  def __str__ (A): return '%.2f %.2f %.2f' %(tuple(A))
  def lun (A): (x,y,z)=A; return math.sqrt(x*x+y*y+z*z)

a=vettore(8,0,2)
print (type(a))
# <class '__main__.vettore'>
print (isinstance(a,vettore))
# True