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# Dictionary storing user information
user_info = {
    "username": "user123",
    "email": "user123@example.com",
    "location": "New York"
}

# Using try-except block to handle KeyError exception
try:
    user_age = user_info["age"]
    print(f"User Age: {user_age}")
except KeyError:
    print("Error: The 'age' key does not exist in the dictionary.")

# Handling Dictionary KeyError Exceptions

A `KeyError` occurs when you attempt to access a key that does not exist in a dictionary.

The following example raises a `KeyError` by attempting to access the non-existent `age` key in a dictionary.

```python title="Example of KeyError Occurrence"
user_info = {
    "username": "user123",
    "email": "user123@example.com",
    "location": "New York"
}

# "age" key does not exist, KeyError raised
user_age = user_info["age"]
```

To prevent `KeyError`, you should verify the existence of a key in the dictionary before attempting to access it.

You can do this using the `in` operator or the `get()` method.

In the next lesson, we will delve deeper into the `in` operator and `get()` method.

In Python, the `in` keyword is used to verify the existence of a particular element in data structures such as dictionaries, lists, and tuples.

### The `in` keyword can be used to check whether a key exists in a dictionary before accessing it.

Handling Dictionary KeyError Exceptions

The in keyword can be used to check whether a key exists in a dictionary before accessing it.

The `in` keyword can be used to check whether a key exists in a dictionary before accessing it.