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I need a way to get a dictionary value if its key exists, or simply return None, if it does not.
However, Python raises a KeyError exception if you search for a key that does not exist. I know that I can check for the key, but I am looking for something more explicit. Is there a way to just return None if the key does not exist?
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If given key does not exists in dictionary, then it returns the passed default value argument. If given key does not exists in dictionary and Default value is also not provided, then it returns None.
Python dictionary get() Method Python dictionary method get() returns a value for the given key. If key is not available then returns default value None.
You can check if a key exists in a dictionary using the keys() method and IN operator. The keys() method will return a list of keys available in the dictionary and IF , IN statement will check if the passed key is available in the list. If the key exists, it returns True else, it returns False .
Use the dict. get() method to return a default value if a key is not in the dictionary, e.g. my_dict. get('key_name', 'default') . The dict.
You can use dict.get()
value = d.get(key) which will return None if key is not in d. You can also provide a different default value that will be returned instead of None:
value = d.get(key, "empty") Wonder no more. It's built into the language.
>>> help(dict) Help on class dict in module builtins: class dict(object) | dict() -> new empty dictionary | dict(mapping) -> new dictionary initialized from a mapping object's | (key, value) pairs ... | | get(...) | D.get(k[,d]) -> D[k] if k in D, else d. d defaults to None. | ...
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