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make_vocab.py
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make_vocab.py
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from os.path import join
import pickle as pkl
START_TOKEN = 0
PAD_TOKEN = 1
END_TOKEN = 2
UNK_TOKEN = 3
# buid sign2id
class Vocab(object):
def __init__(self):
self.sign2id = {"<s>": START_TOKEN, "</s>": END_TOKEN,
"<pad>": PAD_TOKEN, "<unk>": UNK_TOKEN}
self.id2sign = dict((idx, token)
for token, idx in self.sign2id.items())
self.length = 4
def add_sign(self, sign):
if sign not in self.sign2id:
self.sign2id[sign] = self.length
self.id2sign[self.length] = sign
self.length += 1
def add_formula(self, formula):
for sign in formula:
self.add_sign(sign)
def __len__(self):
return self.length
def make_vocab(data_dir):
"""
traverse training formulas to make vocab
and store the vocab in the file
"""
vocab = Vocab()
formulas_file = join(data_dir, 'formulas.norm.lst')
with open(formulas_file, 'r') as f:
formulas = [formula.strip('\n') for formula in f.readlines()]
with open(join(data_dir, 'train_filter.lst'), 'r') as f:
for line in f:
_, idx = line.strip('\n').split()
idx = int(idx)
formula = formulas[idx].split()
vocab.add_formula(formula)
vocab_file = join(data_dir, 'vocab.pkl')
print("Writing Vocab File in ", vocab_file)
with open(vocab_file, 'wb') as w:
pkl.dump(vocab, w)