Add python dict get blog

blog_posts/python-dict-getkey-vs-dictkey.md

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+---
+title: "Tip: You should use dict.get(key) instead of dict[key]"
+type: tip
+tags: python,dictionary
+authors: maciv
+cover: blog_images/fruit-feast.jpg
+excerpt: Learn the difference between two common ways to access values in Python dictionaries and level up your code today.
+---
+
+A common debate among Python developers seems to stem from the retrieval of dictionary values, which can be accomplished using either `dict[key]` or `dict.get(key)`.
+
+Although you can achieve the same result using either one, `dict.get()` is usually preferred, as it accepts a second argument which acts as the default value shall the key not exist in the given dictionary. Due to this property, `dict.get()` will always return a value, whereas `dict[key]` will raise a `KeyError` if the given key is missing.
+
+```python
+a = { 'max': 200 }
+b = { 'min': 100, 'max': 250 }
+c = { 'min': 50 }
+
+a['min'] + b['min'] + c['min'] # throws KeyError
+a.get('min', 0) + b.get('min', 0) + c.get('min', 0) # 150
+```
+
+**Image credit:** [Danielle MacInnes](https://unsplash.com/@dsmacinnes?utm_source=unsplash&utm_medium=referral&utm_content=creditCopyText) on [Unsplash](https://unsplash.com?utm_source=unsplash&utm_medium=referral&utm_content=creditCopyText)