题解 | #遍历字典#

#创建字典
operators_dict={'<': 'less than','==': 'equal'} 
print('Here is the original dict:')
#遍历升序排序过后的字典键值对所有项目
for x,y in sorted(operators_dict.items()):
    print('Operator %s means %s.'%(x,y))

#新增字典中的键值对
operators_dict['>']='greater than'
print()
print('The dict was changed to:')
#遍历升序排序过后的改变过后的字典键值对所有项目
for x,y in sorted(operators_dict.items()):
    print('Operator %s means %s.'%(x,y))