字典和默认值 [英] Dictionaries and default values

问题描述

假设connectionDetails是Python字典，那么重构代码的最好，最优雅，最"pythonic"的方法是什么?

Assuming connectionDetails is a Python dictionary, what's the best, most elegant, most "pythonic" way of refactoring code like this?

if "host" in connectionDetails:
    host = connectionDetails["host"]
else:
    host = someDefaultValue

推荐答案

像这样:

host = connectionDetails.get('host', someDefaultValue)

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