检查字典中是否已存在给定键

问题：

I wanted to test if a key exists in a dictionary before updating the value for the key. 我想在更新密钥值之前测试字典中是否存在密钥。 I wrote the following code: 我写了以下代码：

if 'key1' in dict.keys():
  print "blah"
else:
  print "boo"

I think this is not the best way to accomplish this task. 我认为这不是完成此任务的最佳方法。 Is there a better way to test for a key in the dictionary? 有没有更好的方法来测试字典中的键？

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解决方案：

参考一： https://stackoom.com/question/6izm/检查字典中是否已存在给定键
参考二： https://oldbug.net/q/6izm/Check-if-a-given-key-already-exists-in-a-dictionary

来源：oschina

链接：https://my.oschina.net/u/4438370/blog/4296399