1.字典operator_dict={'<':'less than','==':'equal'}print('Here is the original dict:')for x in sorted(operator_dict): #这样会返回一个list 只包括字典的目录而没有内容 print(f'Operator {x} means {operator_dict[x]}.') # 注意format 函数的使用print(" ")operator_dict['>']='greater than'print("The dict was changed t...