dict.get()

转载于 2018-01-11 06:41:00 发布 · 105 阅读

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原文链接：http://www.cnblogs.com/casperwin/p/8266464.html

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#python

本文介绍了一种使用Python字典dict.get()方法的简洁方式来为变量分配默认值。当指定的键存在于字典中时，该方法返回该键的值；如果不存在，则返回预设的默认值。

Use `dict.get(key[, default])` to assign default values

The code below is functionally equivalent to the original code above, but this solution is more concise.

When get() is called, Python checks if the specified key exists in the dict. If it does, then get() returns the value of that key. If the key does not exist, then get() returns the value specified in the second argument to get().

dictionary = {"message": "Hello, World!"}

data = dictionary.get("message", "")

print(data)  # Hello, World!

转载于:https://www.cnblogs.com/casperwin/p/8266464.html

dict.get()

Use dict.get(key[, default]) to assign default values

Use `dict.get(key[, default])` to assign default values