Direct Address Tables in Python

class DirectAddressTable:
    def __init__(self, size):
        # Create an array of a specified size, initialized with None
        self.table = [None] * size
def insert(self, key, value):
# Ensure that the key is within the valid range of indices
if 0 <= key < len(self.table):
# Store the value at the index corresponding to the key
self.table[key] = value
else:
print("Error: Key is out of range.")

def retrieve(self, key):
# Ensure that the key is within the valid range of indices
if 0 <= key < len(self.table):
# Retrieve the value at the index corresponding to the key
return self.table[key]
else:
print("Error: Key is out of range.")
return None

def delete(self, key):
# Ensure that the key is within the valid range of indices
if 0 <= key < len(self.table):
# Clear the value at the index corresponding to the key
self.table[key] = None
else:
print("Error: Key is out of range.")

# Create a Direct Address Table with a size of 100 (adjust size as needed)
table_size = 100
dat = DirectAddressTable(table_size)

# Insert data elements with keys into the table
dat.insert(5, "Data A")
dat.insert(12, "Data B")
dat.insert(30, "Data C")

# Retrieve data elements using keys
data_a = dat.retrieve(5)
data_b = dat.retrieve(12)
data_c = dat.retrieve(30)

# Print the retrieved data
print("Data A:", data_a)
print("Data B:", data_b)
print("Data C:", data_c)

# Delete data element with a key
dat.delete(12)

# Attempt to retrieve deleted data
deleted_data = dat.retrieve(12)
print("Deleted Data (should be None):", deleted_data)