题解 | #遍历字典#

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