def init_commands(peeling_deg, block_items):
    """ Initialize the commands in the body of the loop
      commands: list of list of tuples
          each list in the list corresponds to a 'peel' in a loop
          each tuple (node,i) contains the AST node and the corresponding ind """
    commands = []
    index = 0
    for i in range(peeling_deg):
        commands.append([])  # each list added corresponds to a 'peel' in a loop
    if block_items is not None:
        for node in block_items:
            for i in range(peeling_deg):
                commands[i].append(
                    (node, index))  # each tuple (node,i) contains the AST node and the corresponding index
            index = index + 1
    return commands