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import json
from itertools import product
import numpy as np
import pandas as pd
import seaborn as sns
from matplotlib import pyplot as plt
from datasets import Dataset
sns.set_theme(style="whitegrid")
# load filtered data
tmp = []
for s in ['train', 'validation', 'test']:
with open(f"data/t_rex.filter.{s}.jsonl") as f:
tmp += [json.loads(i) for i in f.read().split('\n') if len(i) > 0]
data = Dataset.from_list(tmp)
df_main = data.to_pandas()
def is_entity(token):
return any(i.isupper() for i in token)
def filtering(row, min_freq: int = 3, target: str = "subject"):
if not row['is_entity']:
return True
return row[target] >= min_freq
def main(min_entity_freq, max_pairs_predicate, min_pairs_predicate: int = 1,
return_stats: bool = True, random_sampling: bool = True):
df = df_main.copy()
# entity frequency filter
c_sub = df.groupby("subject")['title'].count()
c_obj = df.groupby("object")['title'].count()
key = set(list(c_sub.index) + list(c_obj.index))
count = pd.DataFrame([{'entity': k, "subject": c_sub[k] if k in c_sub else 0, "object": c_obj[k] if k in c_obj else 0} for k in key])
count.index = count.pop('entity')
count['is_entity'] = [is_entity(i) for i in count.index]
count['sum'] = count['subject'] + count['object']
count_filter_sub = count[count.apply(lambda x: filtering(x, min_freq=min_entity_freq, target='subject'), axis=1)]['subject']
count_filter_obj = count[count.apply(lambda x: filtering(x, min_freq=min_entity_freq, target='object'), axis=1)]['object']
vocab_sub = set(count_filter_sub.index)
vocab_obj = set(count_filter_obj.index)
df['flag_subject'] = [i in vocab_sub for i in df['subject']]
df['flag_object'] = [i in vocab_obj for i in df['object']]
df['flag'] = df['flag_subject'] & df['flag_object']
df_filter = df[df['flag']]
df_filter.pop("flag")
df_filter.pop("flag_subject")
df_filter.pop("flag_object")
df_filter['count_subject'] = [count_filter_sub.loc[i] for i in df_filter['subject']]
df_filter['count_object'] = [count_filter_obj.loc[i] for i in df_filter['object']]
df_filter['count_sum'] = df_filter['count_subject'] + df_filter['count_object']
# predicate frequency filter
if random_sampling:
df_balanced = pd.concat(
[g if len(g) <= max_pairs_predicate else g.sample(max_pairs_predicate, random_state=0) for _, g in
df_filter.groupby("predicate") if len(g) >= min_pairs_predicate])
else:
df_balanced = pd.concat(
[g if len(g) <= max_pairs_predicate else g.sort_values(by='count_sum', ascending=False).head(max_pairs_predicate) for _, g in
df_filter.groupby("predicate") if len(g) >= min_pairs_predicate])
if not return_stats:
df_balanced.pop("count_subject")
df_balanced.pop("count_object")
df_balanced.pop("count_sum")
return [i.to_dict() for _, i in df_balanced]
# return distribution
predicate_dist = df_balanced.groupby("predicate")['text'].count().sort_values(ascending=False).to_dict()
entity, count = np.unique(df_balanced['object'].tolist() + df_balanced['subject'].tolist(), return_counts=True)
entity_dist = dict(list(zip(entity.tolist(), count.tolist())))
return predicate_dist, entity_dist, len(df_balanced)
if __name__ == '__main__':
p_dist_full = []
e_dist_full = []
data_size_full = []
config = []
candidates = list(product([1, 2, 3, 4], [100, 50, 25, 10]))
# run filtering with different configs
for min_e_freq, max_p_freq in candidates:
p_dist, e_dist, data_size = main(min_entity_freq=min_e_freq, max_pairs_predicate=max_p_freq)
p_dist_full.append(p_dist)
e_dist_full.append(e_dist)
data_size_full.append(data_size)
config.append([min_e_freq, max_p_freq])
# check statistics
print("- Data Size")
df_size = pd.DataFrame([{"min entity": mef, "max predicate": mpf, "freq": x} for x, (mef, mpf) in zip(data_size_full, candidates)])
df_size = df_size.pivot(index="min entity", columns="max predicate", values="freq")
df_size.index.name = "min entity / max predicate"
df_size.to_csv("data/stats.data_size.csv")
print(df_size.to_markdown())
# plot predicate distribution
fig = plt.figure()
df_p = pd.DataFrame([dict(enumerate(sorted(p.values(), reverse=True))) for p in p_dist_full]).T
df_p.columns = [f"min entity: {mef}, max predicate: {mpf}" for mef, mpf in candidates]
_df_p = df_p[[f"min entity: {mef}, max predicate: 100" for mef in [1, 2, 3, 4]]]
_df_p.columns = [f"min entity: {mef}" for mef in [1, 2, 3, 4]]
ax = sns.lineplot(data=_df_p, linewidth=2.5)
ax.set(xlabel='unique predicates sorted by frequency', ylabel='number of triples', title='Predicate Distribution (max predicate: 100)')
ax.get_figure().savefig("data/stats.predicate_distribution.png", bbox_inches='tight')
ax.get_figure().clf()
# plot entity distribution
df_e = pd.DataFrame([dict(enumerate(sorted(e.values(), reverse=True))) for e in e_dist_full]).T
df_e.columns = [f"min entity: {mef}, max predicate: {mpf}" for mef, mpf in candidates]
fig, axes = plt.subplots(2, 2, constrained_layout=True)
fig.suptitle('Entity Distribution over Different Configurations')
for (x, y), mpf in zip([(0, 0), (0, 1), (1, 0), (1, 1)], [100, 50, 25, 10]):
_df = df_e[[f"min entity: {mef}, max predicate: {mpf}" for mef in [1, 2, 3, 4]]]
_df.columns = [f"min entity: {mef}" for mef in [1, 2, 3, 4]]
ax = sns.lineplot(ax=axes[x, y], data=_df, linewidth=1.5)
ax.set(xscale='log')
if mpf != 100:
ax.legend_.remove()
axes[x, y].set_title(f'max predicate: {mpf}')
fig.supxlabel('unique entities sorted by frequency')
fig.supylabel('number of triples')
fig.savefig("data/stats.entity_distribution.png", bbox_inches='tight')
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