How to fix KeyError: 'old_key' in Python
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We're excited to share with you our newest video, "How to solve KeyError: 'old_key' 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: 'old_key'. Here is a snapshot of the code of the video:
Troubling Scenario: ❗️
dictionary = {'new_key': 1}
print(dictionary['old_key'])
Unwanted Result: 🚫
KeyError: 'old_key'
Effective Resolution: ✔️
dictionary = {'new_key': 1}
print(dictionary.get('old_key', 'Default Value'))
Desired Output: 🏁
Default Value
In this detailed walkthrough, we will illuminate 💡 the underlying cause of this error, and offer a comprehensive explanation: Code1 attempts to access 'old_key' which doesn't exist in the dictionary, causing a KeyError. Code2 correctly uses `.get()` to access 'old_key', providing 'Default Value' if the key is absent. 🎯
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