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| -rw-r--r-- | bot/resources/tags/dict-get.md | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/bot/resources/tags/dict-get.md b/bot/resources/tags/dict-get.md index 7657f420a..867f0b7d9 100644 --- a/bot/resources/tags/dict-get.md +++ b/bot/resources/tags/dict-get.md @@ -1,15 +1,17 @@ Often while using dictionaries in Python, you may run into `KeyErrors`. This error is raised when you try to access a key that isn't present in your dictionary.\ While you can use a `try` and `except` block to catch the `KeyError`, Python also gives you some other neat ways to handle them. -__**The `dict.get` method**__ +**The `dict.get` method** -The [`dict.get`](https://docs.python.org/3/library/stdtypes.html#dict.get) method will return the value for the key if it exists, or None (or a default value that you specify) if the key doesn't exist. Hence it will _never raise_ a KeyError. +The [`dict.get`](https://docs.python.org/3/library/stdtypes.html#dict.get) method will return the value for the key if it exists, and None (or a default value that you specify) if the key doesn't exist. Hence it will _never raise_ a KeyError. ```py >>> my_dict = {"foo": 1, "bar": 2} >>> print(my_dict.get("foobar")) None ->>> print(my_dict.get("foobar", 3)) # here 3 is the default value to be returned, because the key doesn't exist +``` +Below, 3 is the default value to be returned, because the key doesn't exist- +```py +>>> print(my_dict.get("foobar", 3)) 3 ``` - -Some other methods that can be used for handling KeyErrors gracefully are the [`dict.setdefault`](https://docs.python.org/3/library/stdtypes.html#dict.setdefault) method, or by using [`collections.defaultdict`](https://docs.python.org/3/library/collections.html#collections.defaultdict) (check out the `!defaultdict` tag). +Some other methods for handling `KeyError`s gracefully are the [`dict.setdefault`](https://docs.python.org/3/library/stdtypes.html#dict.setdefault) method and [`collections.defaultdict`](https://docs.python.org/3/library/collections.html#collections.defaultdict) (check out the `!defaultdict` tag). |