Programme chap4_classe_2519_.py

# coding: latin-1
class Matrice :
    def __init__ (self,lin,col,coef):
        self.lin, self.col = lin, col

    # interface d'échange
    def get_lin () : return self.lin
    def get_col () : return self.col
    def __getitem__(self,i,j): pass
    def __setitem__(self,i,j,v): pass
    def get_submat(self, i1,j1,i2,j2): pass
    def set_submat(self, i1,j1,mat): pass
    # fin de l'interface d'échange

    def trace (self) :
        t = 0
        for i in xrange (0, self.lin):
            t += self (i,i)
        return t

class MatriceList (Matrice) :
    def __init__ (self,lin,col,coef):
        Matrice.__init__ (self, \
                      lin, col, coef)
        #...

    def __getitem__ (self, i,j) : #...
    def __setitem__ (self, i,j, v) : #...
    def get_submat(self, i1,j1,i2,j2): #...
    def set_submat(self, i1,j1,mat): #...

class MatriceDict (Matrice) :
    def __init__ (self,lin,col,coef):
        Matrice.__init__ (self, \
                       lin, col, coef)
        #...

    def __getitem__ (self, i,j) : #...
    def __setitem__ (self, i,j, v) : #...
    def get_submat(self, i1,j1,i2,j2): #...
    def set_submat(self, i1,j1,mat): #...