例子:import itertoolsdef groupnames(name_iterable):print(name_iterable)sorted_names = sorted(name_iterable, key=_sortkeyfunc)name_dict = { }for key, group in itertools.groupby(sorted_names, _groupkeyfunc):name_dict[key] = tuple(group)return name_dictpieces_order = { 2: (-1, 0), 3: (-1, 0, 1) }def _sortkeyfunc(name):''' name is a string with first and last names, and an optional middlename or initial, separated by spaces; returns a string in orderlast-first-middle, as wanted for sorting purposes. '''print(name)name_parts = name.split( )return ' '.join([name_parts[n] for n in pieces_order[len(name_parts)]])def _groupkeyfunc(name):''' returns the key for grouping, i.e. the last name's initial. '''return name.split( )[-1][0]輸出結(jié)果卻是這樣 應(yīng)該兩個(gè)都是Bnthony Hall啊,為什么第二個(gè)會(huì)變成B了>>> groupnames('Bnthony Hall')Bnthony HallB