Name	Name	Last commit message	Last commit date
parent directory ..
fix.py	fix.py
readme.md	readme.md
reproduce.py	reproduce.py

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KeyError: 'age'

Occurs when accessing a missing key in a dictionary.

Reproduce

data = {
    "name": "john"
}

age = data["age"]
print(age)

KeyError: 'age'

data = {
    "name": "john"
}

age = data.get("age", 0)
print(age)

Assumed the key existed without checking.