How to fix KeyError: 'Attempt to access a key not present in the dictionary ... in Python

Hello, Dedicated Coders! 🖥️💡

We're excited to share with you our newest video, "How to solve KeyError: 'Attempt to access a key not present in the dictionary used for mapping dataframe column values.' in Python". 🎥 This series is meticulously designed to arm you with knowledge 🧠 and skills 🛠️ to overcome frequent coding challenges.

Today, we will decipher 🔎 and resolve a common error faced by Python coders: the bit hard to solve KeyError: 'Attempt to access a key not present in the dictionary used for mapping dataframe column values.'. Here is a snapshot of the code of the video:

Troubling Scenario: ❗️

my_dict = {'a': 1, 'b': 2}
print(my_dict['c'])

Unwanted Result: 🚫
KeyError: 'Attempt to access a key not present in the dictionary used for mapping dataframe column values.'

Effective Resolution: ✔️

my_dict = {'a': 1, 'b': 2}

Desired Output: 🏁
None

In this detailed walkthrough, we will illuminate 💡 the underlying cause of this error, and offer a comprehensive explanation: Code1 raises a KeyError because it tries to access a non-existent key 'c'. Code2 uses `.get()` which returns `None` instead of raising an error, gracefully handling missing keys. No correction needed for Code2. 🎯

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