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In many situations, such as configuration files, missing values are not exceptional, but may be treated as if a default
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value was present. For this case, use [`value(key, default_value)`](../../api/basic_json/value.md) which takes the key
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you want to access and a default value in case there is no value stored with that key.
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you want to access and a default value in case there is no value stored with that key. This is equivalent to Python's
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`dict.get(key, default)`.
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## Example
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