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How Do I Handle Missing Dictionary Keys in Python?

Aaron Maxwell

出版	O'Reilly, 2017
URL	http://books.google.com.hk/books?id=4ShNzQEACAAJ&hl=&source=gbs_api

註釋

"When working with Python dictionaries, sometimes your code has to deal with keys that may not be there; depending on the situation, this is trickier than it looks. In fact, your code may have a major bug in it right now! Learn the three different techniques for handling missing dict keys, their different strengths, and avoidable gotchas."--Resource description page.