Module 20: Advanced Dictionary Practice

Safe Access with `.get()`

Accessing a missing key with `[]` causes an error! The `.get()` method is safer: it returns `None` (or a default value you specify) if the key isn't found.

Given the dictionary:

inventory = {'apples': 5, 'bananas': 12}

Your task: Use the .get() method to retrieve the value for the key 'oranges'. If it's missing, return the default value 0.

Your Code:

Simulated Result:

Result will appear here...

Exploring Dictionary Contents

Dictionaries have helpful methods to see their contents. Click the buttons below to see what `.keys()`, `.values()`, and `.items()` (key-value pairs) conceptually return for the example dictionary.

Example Dictionary:

user_prefs = {'theme': 'dark', 'fontSize': 14, 'notify': True}

Conceptual Output:

Click a button above...

Working with Nested Dictionaries

Dictionaries can contain other dictionaries (or lists!). Access nested values by chaining the square brackets `[]`.

Consider this nested dictionary:

data = {
  'user_id': 123,
  'profile': {
    'name': 'Charlie',
    'contact': {
      'email': 'charlie@email.com',
      'phone': '555-1234'
    }
  }
}

Your task: Write the Python code to access 'Charlie''s email address.

Your Code:

Simulated Result:

Result will appear here...

Advanced Missions!

Apply your knowledge of `.get()`, methods, and nested structures.

Mission 1: Get Status Safely

Assume `server_status = {'ip': '192.168.1.100', 'online': True}` exists. Write one line using `.get()` to print the value of the key 'latency'. If it's missing, print the default string "unknown".

Output check appears here...

Mission 2: Build Nested Info

Create a dictionary named `project`. It should have a key 'name' with value 'AI Project'. It should also have a key 'details' whose value is *another dictionary* containing 'status': 'active' and 'version': 0.1.

State check appears here...

Mission 3: Update Nested Status

Assume the `project` dictionary from Mission 2 exists. Write one line of code to change the nested 'status' inside 'details' to 'completed'.

State check appears here...

Module 20 Advanced Practice Complete!

Excellent work! You've explored powerful dictionary methods and handled nested data structures.
Feel free to review the basic practice or watch the video lesson for reinforcement.

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