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 {0} means {1}.'.format(i, operators_dict[i]))
print()
operators_dict['>'] = 'greater than'
print('The dict was changed to:')
for i in sorted(operators_dict):
    print('Operator {0} means {1}.'.format(i, operators_dict[i]))
print()