题解 | #遍历字典#

operators_dict = {'<': 'less than','==': 'equal'}
print('Here is the original dict:')
list1 = list(operators_dict.keys())
list2 = sorted(list1)
for i in list2:
    print(f'Operator {i} means {operators_dict[i]}.')
operators_dict = operators_dict | {'>': 'greater than'}
print()
print('The dict was changed to:')
list3 = list(operators_dict.keys())
list4 = sorted(list3)
for i in list4:
    print(f'Operator {i} means {operators_dict[i]}.')