human
Solve the following python programming problem given the following code:
def _print_MatrixSlice(self, expr) : 
    def strslice(x) : 
        x = list (x) 
        if (x [2] == 1) : 
            del x [2] 
if (x [1] == (x [0] + 1)) : 
            del x [1] 
if (x [0] == 0) : 
            x [0] = '' 
return ':'.join (map (self._print, x)) 
return (((((self._print (strslice.parent) + '[') + strslice (expr.rowslice)) + ', ') + strslice (expr.colslice)) + ']') 

    
    

    Fix the buggy line: return (((((self._print (strslice.parent) + '[') + strslice (expr.rowslice)) + ', ') + strslice (expr.colslice)) + ']')
assistant
#Here is Python code to fix the buggy line: return (((((self.

return (((((self._print (expr.parent) + '[') + strslice (expr.rowslice)) + ', ') + strslice (expr.colslice)) + ']')