Getting Started with Python (Part 8-2): Working with Multiple Data – Tuples, Sets, and Dictionaries

Source: Dev.to

Working with Multiple Data – Tuples, Sets, and Dictionaries

Tuples

Tuples are similar to lists but are immutable, meaning their values cannot be changed after creation.

member = ("Maruko", "Tama", "Maruo")
member[0] = "Batsuko"  # Error
member[1] = "Pochi"    # Error
member[2] = "Batsuo"   # Error

Use tuples when you need data that must never be altered.

Sets

Sets are unordered collections that automatically remove duplicate values. They are defined with curly braces {}.

member = {"Maruko", "Noguchi", "Tama", "Noguchi", "Maruo", "Noguchi"}
print(member)
# {'Noguchi', 'Maruko', 'Maruo', 'Tama'}

Because sets have no order, you cannot access elements by index (e.g., member[0]).

Dictionaries

Dictionaries store data as key–value pairs. Access a value by specifying its key.

member = {"maruchan": "Maruko", "tama": "Tama", "maruo": "Maruo"}
print(member)
# {'maruchan': 'Maruko', 'tama': 'Tama', 'maruo': 'Maruo'}

# Access values by key
print(member["maruchan"])  # Maruko
print(member["tama"])      # Tama
print(member["maruo"])     # Maruo

# Update values by key
member["tama"] = "Pochi"
member["maruo"] = "Batsuo"
print(member)
# {'maruchan': 'Maruko', 'tama': 'Pochi', 'maruo': 'Batsuo'}

Important Dictionary Methods

• keys() – returns a view of all keys.

  member = {"maruchan": "Maruko", "tama": "Tama", "maruo": "Maruo"}
  print(list(member.keys()))
  # ['maruchan', 'tama', 'maruo']

• values() – returns a view of all values.

  print(list(member.values()))
  # ['Maruko', 'Tama', 'Maruo']

• items() – returns a view of (key, value) tuples.

  print(list(member.items()))
  # [('maruchan', 'Maruko'), ('tama', 'Tama'), ('maruo', 'Maruo')]

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Thank you for reading! In the next article, we’ll explore loops and iteration. Stay tuned! 🚀