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alireza
2025-02-22 17:17:58 +03:30
parent 8940a7d7f9
commit 8820b64c3e
1 changed files with 138 additions and 84 deletions
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222
load_tinystories.py
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@@ -16,10 +16,22 @@ class BiDict:
self.vec_to_word = {}
def __setitem__(self, word, vector):
self.word_to_vec[word] = vector
self.vec_to_word[vector] = word
# Convert numpy array to tuple for hashing
if isinstance(vector, np.ndarray):
vector_tuple = tuple(vector.flatten())
else:
vector_tuple = tuple(vector)
# Convert vector to string of 1s and 0s
vector_str = ''.join(str(int(x)) for x in vector_tuple)
self.word_to_vec[word] = vector_str
self.vec_to_word[vector_str] = word
def __getitem__(self, key):
# If key is a numpy array, convert to string
if isinstance(key, np.ndarray):
key = ''.join(str(int(x)) for x in key.flatten())
# Try word_to_vec first, then vec_to_word
return self.word_to_vec.get(key) or self.vec_to_word.get(key)
@@ -52,6 +64,22 @@ def tokenize_with_punctuation(text):
# Filter out empty strings and pure whitespace, but keep punctuation
return [token for token in tokens if token.strip() or token in '.,!?;:"\'()[]{}']
def make_binary_tokens(unique_tokens, N=12):
"""
Create binary vectors for tokens.
Each vector is N bits long, containing only 0s and 1s.
"""
# Generate random binary vectors (0s and 1s only)
codes = np.random.randint(0, 2, size=(len(unique_tokens), N))
token_to_vector = BiDict()
for i, w in enumerate(unique_tokens):
# Convert to string of 0s and 1s directly
binary_str = ''.join(str(int(x)) for x in codes[i])
token_to_vector[w] = binary_str
return token_to_vector
def get_vocabulary(stories, N=12):
"""
Create vocabulary from the given stories.
@@ -62,7 +90,6 @@ def get_vocabulary(stories, N=12):
for story in stories:
tokens = tokenize_with_punctuation(story)
all_tokens.update(tokens)
# Sort tokens for consistent encoding
unique_tokens = sorted(all_tokens)
@@ -72,15 +99,8 @@ def get_vocabulary(stories, N=12):
raise ValueError(f"Vocabulary size ({num_tokens}) exceeds {N}-bit capacity ({2**N})")
# Generate all possible N-bit numbers
all_possible = list(range(2**N))
np.random.shuffle(all_possible)
# Create unique random binary numbers for each token
token_to_vector = BiDict()
for i, token in enumerate(unique_tokens):
binary = format(all_possible[i], f'0{N}b')
token_to_vector[token] = binary
token_to_vector = make_binary_tokens(unique_tokens, N=N)
return token_to_vector
def save_encodings(vocab, encoded_stories, stories, filename='encodings.pkl'):
@@ -101,11 +121,9 @@ def load_encodings(filename='encodings.pkl'):
return data['vocabulary'], data['encoded_stories'], data['original_stories']
return None, None, None
def encode_stories(n_stories=30, force_encode=False, N=12):
def encode_stories(n_stories=200, force_encode=False, N=12, batch_size=50):
"""
Encode the first n stories into N-bit vectors.
If encodings exist and force_encode is False, load from file.
Otherwise, create new encodings and save them.
Encode stories in batches to reduce memory usage.
"""
if not force_encode:
vocab, encoded_stories, stories = load_encodings()
@@ -114,46 +132,80 @@ def encode_stories(n_stories=30, force_encode=False, N=12):
return vocab, encoded_stories, stories
ds = load_tinystories()
stories = [ds['train'][i]['text'] for i in range(n_stories)]
print(stories)
# Get vocabulary mapping with specified N
vocab = get_vocabulary(stories, N=N)
# Encode stories
# Process stories in batches
stories = []
encoded_stories = []
for story in stories:
tokens = tokenize_with_punctuation(story)
encoded_tokens = [vocab[token] for token in tokens]
encoded_stories.append(encoded_tokens)
all_tokens = set()
# Save the encodings
# First pass: collect vocabulary
print("Building vocabulary...")
for i in tqdm(range(0, n_stories, batch_size)):
batch = [ds['train'][j]['text'] for j in range(i, min(i + batch_size, n_stories))]
for story in batch:
tokens = tokenize_with_punctuation(story)
all_tokens.update(tokens)
# Create vocabulary
unique_tokens = sorted(all_tokens)
vocab = make_binary_tokens(unique_tokens, N=N)
# Second pass: encode stories
print("Encoding stories...")
for i in tqdm(range(0, n_stories, batch_size)):
batch = [ds['train'][j]['text'] for j in range(i, min(i + batch_size, n_stories))]
batch_stories = []
batch_encoded = []
for story in batch:
tokens = tokenize_with_punctuation(story)
encoded_tokens = [vocab[token] for token in tokens]
batch_stories.append(story)
batch_encoded.append(encoded_tokens)
stories.extend(batch_stories)
encoded_stories.extend(batch_encoded)
# Save intermediate results
if (i + batch_size) % (batch_size * 4) == 0:
save_encodings(vocab, encoded_stories, stories)
print(f"Saved progress: {i + batch_size}/{n_stories} stories")
# Final save
save_encodings(vocab, encoded_stories, stories)
print("Created and saved new encodings")
return vocab, encoded_stories, stories
def get_word_sequences(encoded_stories, M=100, N=12):
def get_word_sequences(encoded_stories, M=100, N=12, batch_size=32):
"""
Get sequences of M consecutive words from encoded stories.
Each word is N bits long.
Process in batches to reduce memory usage.
"""
M_N_sequences = []
sequences = []
# Process each story with progress bar
for story in tqdm(encoded_stories, desc="Generating sequences"):
# Only process if story has enough words
if len(story) >= M:
# Get groups of M words, shifting by 1 word each time
for i in range(len(story) - M + 1):
word_group = story[i:i + M]
# Convert words to bit array
bits = []
for word in word_group:
bits.extend([int(bit) for bit in word])
vector = np.array(bits).reshape(M * N, 1)
M_N_sequences.append(vector)
# Process stories in batches
for i in tqdm(range(0, len(encoded_stories), batch_size), desc="Generating sequences"):
batch = encoded_stories[i:i + batch_size]
batch_sequences = []
for story in batch:
if len(story) >= M:
for j in range(len(story) - M + 1):
word_group = story[j:j + M]
bits = []
for word in word_group:
bits.extend([int(bit) for bit in word])
vector = np.array(bits).reshape(M * N, 1)
batch_sequences.append(vector)
sequences.extend(batch_sequences)
# Free memory
del batch_sequences
return np.array(M_N_sequences)
return np.array(sequences)
def sequence_to_words(sequence, N=12):
"""
@@ -165,19 +217,40 @@ def sequence_to_words(sequence, N=12):
words = [''.join(bits[i:i + N]) for i in range(0, len(bits), N)]
return words
def calculate_energy(sequences):
def calculate_energy(sequences, batch_size=32):
"""
Calculate the energy of each sequence.
Calculate the energy of sequences using batched processing.
Returns energies and Hamiltonian matrix.
"""
num_sequences = len(sequences)
seq_length = sequences[0].shape[0]
# Initialize Hamiltonian matrix
hamiltonian = np.zeros((seq_length, seq_length))
energies = []
hamiltonian = 0
for seq in sequences:
energy = -seq.dot(seq.T)/2
hamiltonian += energy
energies.append(energy)
plt.semilogy(-np.linalg.eigvals(hamiltonian), ".")
plt.show()
return energies, hamiltonian
# Process sequences in batches
for i in tqdm(range(0, num_sequences, batch_size), desc="Calculating energies"):
batch = sequences[i:min(i + batch_size, num_sequences)]
batch = np.array(batch) # Convert batch to numpy array
# Calculate batch energies
batch_energies = np.sum(batch * batch.transpose(0, 2, 1), axis=(1, 2)) / -2
energies.extend(batch_energies)
# Update Hamiltonian
batch_hamiltonian = np.sum(np.matmul(batch, batch.transpose(0, 2, 1)), axis=0)
hamiltonian += batch_hamiltonian
# Free memory
del batch
del batch_energies
del batch_hamiltonian
# Normalize Hamiltonian
hamiltonian = hamiltonian / num_sequences
return np.array(energies), hamiltonian
def retrieve_sequences(sequences, partial_sequence, vocab, W, M=10, N=12, temperature=1.0):
"""
@@ -202,7 +275,7 @@ def retrieve_sequences(sequences, partial_sequence, vocab, W, M=10, N=12, temper
# Calculate energy using Ising Hamiltonian
energy_matrix = complete_vec.T.dot(W).dot(complete_vec)
energy = -0.5 * float(energy_matrix[0, 0])
energy = float(energy_matrix[0, 0])
word_energies.append((word, energy))
@@ -266,14 +339,18 @@ def predict_sequence(initial_sequence, vocab, sequences, W, D=10, M=100, N=12, t
return predictions, energies
if __name__ == "__main__":
N = 13 # Define N as a constant
M = 10 # Define M as a constant
D = 3 # Number of words to predict
temperature = 1.0 # Increased temperature for more diversity
N = 20 # Define N as a constant
M = 20 # Define M as a constant
D = 10 # Number of words to predict
temperature = 0.10
batch_size = 50 # Added batch size parameter
print("Loading and encoding stories...")
# Force new encoding to ensure consistency
vocab, encoded_stories, original_stories = encode_stories(force_encode=True, N=N)
vocab, encoded_stories, original_stories = encode_stories(
force_encode=True,
N=N,
batch_size=batch_size
)
print("\nGenerating training sequences...")
# Get sequences for training
@@ -303,7 +380,7 @@ if __name__ == "__main__":
# Print results
print("\nOriginal sequence:")
print(" ".join(initial_tokens[-10:])) # Last 10 tokens of initial sequence
print(" ".join(initial_tokens)) # Last 10 tokens of initial sequence
print("\nPredicted sequence:")
print(" ".join(predicted_words))
print("\nEnergies:")
@@ -312,26 +389,3 @@ if __name__ == "__main__":
print(" ".join(story_tokens[M-1:M-1+D])) # Next D actual words
else:
print(f"Story too short. Needs at least {M-1} tokens, but has {len(story_tokens)}")
# # Print example
# print(f"Total vocabulary size: {len(vocab)}")
# print("\nExample encoding for first story:")
# print("Original:", original_stories[0])
# print("First few tokens and their encodings:")
# tokens = tokenize_with_punctuation(original_stories[0])
# for token, encoding in zip(tokens[:10], encoded_stories[0][:10]):
# print(f"'{token}' -> {encoding}")
# # Get statistics about vector usage
# total_unique_in_vocab = len(vocab)
# total_unique_used = len(set([vec for story in encoded_stories for vec in story]))
# total_vectors = sum(len(story) for story in encoded_stories)
# print(f"\nTotal unique vectors in vocabulary: {total_unique_in_vocab}")
# print(f"Total unique vectors used in stories: {total_unique_used}")
# print(f"Total word occurrences: {total_vectors}")
# print(encoded_stories[0])
# print(sequences)
# plt.imshow(energies[0])
# plt.show()