Function main

python/examples/basic_usage.py:19–139

()

def main():
    print("=== B+ Tree Basic Usage Examples ===\n")

    # Create a B+ tree with specified capacity
    print("1. Creating a B+ Tree")
    tree = BPlusTreeMap(capacity=16)  # Higher capacity = better performance
    print(f"   Created empty tree with capacity {tree.capacity}")
    print(f"   Length: {len(tree)}")
    print(f"   Is empty: {not bool(tree)}")

    print("\n2. Adding data (dictionary-like syntax)")
    # Use dictionary-like syntax to add data
    tree[1] = "apple"
    tree[5] = "banana"
    tree[3] = "cherry"
    tree[8] = "date"
    tree[2] = "elderberry"

    print(f"   Added 5 items")
    print(f"   Length: {len(tree)}")
    print(f"   Keys are automatically sorted!")

    print("\n3. Accessing data")
    # Get values using dictionary syntax
    print(f"   tree[3] = {tree[3]}")
    print(f"   tree.get(5) = {tree.get(5)}")
    print(f"   tree.get(10, 'not found') = {tree.get(10, 'not found')}")

    # Check if keys exist
    print(f"   3 in tree: {3 in tree}")
    print(f"   10 in tree: {10 in tree}")

    print("\n4. Iterating over data")
    print("   All items (automatically sorted by key):")
    for key, value in tree.items():
        print(f"     {key}: {value}")

    print("\n   Just keys:")
    for key in tree.keys():
        print(f"     {key}")

    print("\n   Just values:")
    for value in tree.values():
        print(f"     {value}")

    print("\n5. Dictionary methods")

    # setdefault - get value or set default
    result = tree.setdefault(10, "fig")
    print(f"   setdefault(10, 'fig'): {result}")
    print(f"   Length now: {len(tree)}")

    # pop - remove and return value
    removed = tree.pop(5)
    print(f"   pop(5): {removed}")
    print(f"   Length now: {len(tree)}")

    # popitem - remove and return arbitrary item (first in B+ tree)