python dict set default
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In Python, dictionaries (dict) are widely used to store and manipulate key-value pairs. The setdefault() method is a handy dictionary method that helps you avoid key errors when trying to access a non-existent key. This tutorial will cover the basics of the dict.setdefault() method, its syntax, and provide practical examples to demonstrate its usage.
The setdefault() method checks if the specified key is present in the dictionary. If the key is found, it returns the corresponding value. If the key is not found, it inserts the key with the specified default value and returns the default value.
In this example, setdefault() is used to initialize the count for each fruit to zero before incrementing it.
In this example, setdefault() is used to ensure that the nested dictionary for 'John' exists before setting the grade for 'History'.
The dict.setdefault() method is a valuable tool for working with dictionaries in Python, especially when dealing with default values for keys. By using this method, you can write cleaner and more concise code while avoiding common key errors. Incorporate this method into your Python projects to enhance the robustness of your dictionary manipulations.
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