>>> dict = {} >>> dict[‘key1‘] = ‘value1‘ >>> print (dict) {‘key1‘: ‘value1‘} >>> dict[‘key2‘] = ‘value2‘ >>> print (dict) {‘key2‘: ‘value2‘, ‘key1‘: ‘value1‘} >>> dict[‘key3‘] = ‘value3‘ >>> print (dict) {‘key2‘: ‘value2‘, ‘key3‘: ‘value3‘, ‘key1‘: ‘value1‘} >>> dict[‘key2‘] = ‘value2‘ >>> print (dict) {‘key2‘: ‘value2‘, ‘key3‘: ‘value3‘, ‘key1‘: ‘value1‘} >>>
本文出自 “专注于Oracle性能调优” 博客,请务必保留此出处http://5073392.blog.51cto.com/5063392/1543282
原文:http://5073392.blog.51cto.com/5063392/1543282