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elo_analysis.py
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elo_analysis.py
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import argparse
import ast
from collections import defaultdict
import datetime
import json
import math
import pickle
from pytz import timezone
from functools import partial
import numpy as np
import pandas as pd
import plotly.express as px
from tqdm import tqdm
from transformers import AutoTokenizer
from fastchat.model.model_registry import get_model_info
from fastchat.serve.monitor.basic_stats import get_log_files
from fastchat.serve.monitor.clean_battle_data import clean_battle_data
pd.options.display.float_format = "{:.2f}".format
STYLE_CONTROL_ELEMENTS_V1 = [
"sum_assistant_a_tokens",
"header_count_a",
"list_count_a",
"bold_count_a",
"sum_assistant_b_tokens",
"header_count_b",
"list_count_b",
"bold_count_b",
]
def compute_elo(battles, K=4, SCALE=400, BASE=10, INIT_RATING=1000):
rating = defaultdict(lambda: INIT_RATING)
for rd, model_a, model_b, winner in battles[
["model_a", "model_b", "winner"]
].itertuples():
ra = rating[model_a]
rb = rating[model_b]
ea = 1 / (1 + BASE ** ((rb - ra) / SCALE))
eb = 1 / (1 + BASE ** ((ra - rb) / SCALE))
if winner == "model_a":
sa = 1
elif winner == "model_b":
sa = 0
elif winner == "tie" or winner == "tie (bothbad)":
sa = 0.5
else:
raise Exception(f"unexpected vote {winner}")
rating[model_a] += K * (sa - ea)
rating[model_b] += K * (1 - sa - eb)
return dict(rating)
def get_bootstrap_result(battles, func_compute_elo, num_round=1000):
rows = []
for i in tqdm(range(num_round), desc="bootstrap"):
tmp_battles = battles.sample(frac=1.0, replace=True)
rows.append(func_compute_elo(tmp_battles))
df = pd.DataFrame(rows)
return df[df.median().sort_values(ascending=False).index]
def compute_elo_mle_with_tie(
df, SCALE=400, BASE=10, INIT_RATING=1000, sample_weight=None
):
from sklearn.linear_model import LogisticRegression
ptbl_a_win = pd.pivot_table(
df[df["winner"] == "model_a"],
index="model_a",
columns="model_b",
aggfunc="size",
fill_value=0,
)
ptbl_tie = pd.pivot_table(
df[df["winner"].isin(["tie", "tie (bothbad)"])],
index="model_a",
columns="model_b",
aggfunc="size",
fill_value=0,
)
ptbl_tie = ptbl_tie + ptbl_tie.T
ptbl_b_win = pd.pivot_table(
df[df["winner"] == "model_b"],
index="model_a",
columns="model_b",
aggfunc="size",
fill_value=0,
)
ptbl_win = ptbl_a_win * 2 + ptbl_b_win.T * 2 + ptbl_tie
models = pd.Series(np.arange(len(ptbl_win.index)), index=ptbl_win.index)
p = len(models)
X = np.zeros([p * (p - 1) * 2, p])
Y = np.zeros(p * (p - 1) * 2)
cur_row = 0
sample_weights = []
for m_a in ptbl_win.index:
for m_b in ptbl_win.columns:
if m_a == m_b:
continue
# if nan skip
if math.isnan(ptbl_win.loc[m_a, m_b]) or math.isnan(ptbl_win.loc[m_b, m_a]):
continue
X[cur_row, models[m_a]] = +math.log(BASE)
X[cur_row, models[m_b]] = -math.log(BASE)
Y[cur_row] = 1.0
sample_weights.append(ptbl_win.loc[m_a, m_b])
X[cur_row + 1, models[m_a]] = math.log(BASE)
X[cur_row + 1, models[m_b]] = -math.log(BASE)
Y[cur_row + 1] = 0.0
sample_weights.append(ptbl_win.loc[m_b, m_a])
cur_row += 2
X = X[:cur_row]
Y = Y[:cur_row]
lr = LogisticRegression(fit_intercept=False, penalty=None)
lr.fit(X, Y, sample_weight=sample_weights)
elo_scores = SCALE * lr.coef_[0] + INIT_RATING
if "mixtral-8x7b-instruct-v0.1" in models.index:
elo_scores += 1114 - elo_scores[models["mixtral-8x7b-instruct-v0.1"]]
return pd.Series(elo_scores, index=models.index).sort_values(ascending=False)
def get_median_elo_from_bootstrap(bootstrap_df):
median = dict(bootstrap_df.quantile(0.5))
median = {k: int(v + 0.5) for k, v in median.items()}
return median
def compute_pairwise_win_fraction(battles, model_order, limit_show_number=None):
# Times each model wins as Model A
a_win_ptbl = pd.pivot_table(
battles[battles["winner"] == "model_a"],
index="model_a",
columns="model_b",
aggfunc="size",
fill_value=0,
)
# Table counting times each model wins as Model B
b_win_ptbl = pd.pivot_table(
battles[battles["winner"] == "model_b"],
index="model_a",
columns="model_b",
aggfunc="size",
fill_value=0,
)
# Table counting number of A-B pairs
num_battles_ptbl = pd.pivot_table(
battles, index="model_a", columns="model_b", aggfunc="size", fill_value=0
)
# Computing the proportion of wins for each model as A and as B
# against all other models
row_beats_col_freq = (a_win_ptbl + b_win_ptbl.T) / (
num_battles_ptbl + num_battles_ptbl.T
)
if model_order is None:
prop_wins = row_beats_col_freq.mean(axis=1).sort_values(ascending=False)
model_order = list(prop_wins.keys())
if limit_show_number is not None:
model_order = model_order[:limit_show_number]
# Arrange ordering according to proprition of wins
row_beats_col = row_beats_col_freq.loc[model_order, model_order]
return row_beats_col
def visualize_leaderboard_table(rating):
models = list(rating.keys())
models.sort(key=lambda k: -rating[k])
emoji_dict = {
1: "🥇",
2: "🥈",
3: "🥉",
}
md = ""
md += "| Rank | Model | Elo Rating | Description |\n"
md += "| --- | --- | --- | --- |\n"
for i, model in enumerate(models):
rank = i + 1
minfo = get_model_info(model)
emoji = emoji_dict.get(rank, "")
md += f"| {rank} | {emoji} [{model}]({minfo.link}) | {rating[model]:.0f} | {minfo.description} |\n"
return md
def visualize_pairwise_win_fraction(battles, model_order, scale=1):
row_beats_col = compute_pairwise_win_fraction(battles, model_order)
fig = px.imshow(
row_beats_col,
color_continuous_scale="RdBu",
text_auto=".2f",
height=700 * scale,
width=700 * scale,
)
fig.update_layout(
xaxis_title="Model B",
yaxis_title="Model A",
xaxis_side="top",
title_y=0.07,
title_x=0.5,
)
fig.update_traces(
hovertemplate="Model A: %{y}<br>Model B: %{x}<br>Fraction of A Wins: %{z}<extra></extra>"
)
return fig
def visualize_battle_count(battles, model_order, scale=1):
ptbl = pd.pivot_table(
battles, index="model_a", columns="model_b", aggfunc="size", fill_value=0
)
battle_counts = ptbl + ptbl.T
fig = px.imshow(
battle_counts.loc[model_order, model_order],
text_auto=True,
height=700 * scale,
width=700 * scale,
)
fig.update_layout(
xaxis_title="Model B",
yaxis_title="Model A",
xaxis_side="top",
title_y=0.07,
title_x=0.5,
)
fig.update_traces(
hovertemplate="Model A: %{y}<br>Model B: %{x}<br>Count: %{z}<extra></extra>"
)
return fig
def visualize_average_win_rate(battles, limit_show_number, scale=1):
row_beats_col_freq = compute_pairwise_win_fraction(
battles, None, limit_show_number=limit_show_number
)
fig = px.bar(
row_beats_col_freq.mean(axis=1).sort_values(ascending=False),
text_auto=".2f",
height=500 * scale,
width=700 * scale,
)
fig.update_layout(
yaxis_title="Average Win Rate", xaxis_title="Model", showlegend=False
)
return fig
def visualize_bootstrap_elo_rating(df, df_final, limit_show_number, scale=1):
bars = (
pd.DataFrame(
dict(
lower=df.quantile(0.025),
rating=df_final,
upper=df.quantile(0.975),
)
)
.reset_index(names="model")
.sort_values("rating", ascending=False)
)
bars = bars[:limit_show_number]
bars["error_y"] = bars["upper"] - bars["rating"]
bars["error_y_minus"] = bars["rating"] - bars["lower"]
bars["rating_rounded"] = np.round(bars["rating"])
fig = px.scatter(
bars,
x="model",
y="rating",
error_y="error_y",
error_y_minus="error_y_minus",
text="rating_rounded",
height=700,
width=700 * scale,
)
fig.update_layout(xaxis_title="Model", yaxis_title="Rating")
return fig
def limit_user_votes(battles, daily_vote_per_user):
from datetime import datetime
print("Before limiting user votes: ", len(battles))
# add date
battles["date"] = battles["tstamp"].apply(
lambda x: datetime.fromtimestamp(x).strftime("%Y-%m-%d")
)
battles_new = pd.DataFrame()
for date in battles["date"].unique():
# only take the first daily_vote_per_user votes per judge per day
df_today = battles[battles["date"] == date]
df_sub = df_today.groupby("judge").head(daily_vote_per_user)
# add df_sub to a new dataframe
battles_new = pd.concat([battles_new, df_sub])
print("After limiting user votes: ", len(battles_new))
return battles_new
def get_model_pair_stats(battles):
battles["ordered_pair"] = battles.apply(
lambda x: tuple(sorted([x["model_a"], x["model_b"]])), axis=1
)
model_pair_stats = {}
for index, row in battles.iterrows():
pair = row["ordered_pair"]
if pair not in model_pair_stats:
model_pair_stats[pair] = {"win": 0, "loss": 0, "tie": 0}
if row["winner"] in ["tie", "tie (bothbad)"]:
model_pair_stats[pair]["tie"] += 1
elif row["winner"] == "model_a" and row["model_a"] == min(pair):
model_pair_stats[pair]["win"] += 1
elif row["winner"] == "model_b" and row["model_b"] == min(pair):
model_pair_stats[pair]["win"] += 1
else:
model_pair_stats[pair]["loss"] += 1
return model_pair_stats
def outlier_detect(
model_pair_stats,
battles,
max_vote=100,
randomized=False,
alpha=0.05,
c_param=0.5,
user_list=None,
):
if user_list is None:
# only check user who has >= 5 votes to save compute
user_vote_cnt = battles["judge"].value_counts()
user_list = user_vote_cnt[user_vote_cnt >= 5].index.tolist()
print("#User to be checked: ", len(user_list))
bad_user_list = []
for user in user_list:
flag = False
p_upper = []
p_lower = []
df_2 = battles[battles["judge"] == user]
for row in df_2.iterrows():
if len(p_upper) >= max_vote:
break
model_pair = tuple(sorted([row[1]["model_a"], row[1]["model_b"]]))
if row[1]["winner"] in ["tie", "tie (bothbad)"]:
vote = 0.5
elif row[1]["winner"] == "model_a" and row[1]["model_a"] == model_pair[0]:
vote = 1
elif row[1]["winner"] == "model_b" and row[1]["model_b"] == model_pair[0]:
vote = 1
else:
vote = 0
stats = model_pair_stats[model_pair]
# count all votes
# ratings = np.array(
# [1] * stats["win"] + [0.5] * stats["tie"] + [0] * stats["loss"]
# )
# only count win and loss
ratings = np.array([1] * stats["win"] + [0] * stats["loss"])
if randomized:
noise = np.random.uniform(-1e-5, 1e-5, len(ratings))
ratings += noise
vote += np.random.uniform(-1e-5, 1e-5)
p_upper += [(ratings <= vote).mean()]
p_lower += [(ratings >= vote).mean()]
M_upper = np.prod(1 / (2 * np.array(p_upper)))
M_lower = np.prod(1 / (2 * np.array(p_lower)))
# M_upper = np.prod((1 - c_param) / (c_param * np.array(p_upper) ** c_param))
# M_lower = np.prod((1 - c_param) / (c_param * np.array(p_lower) ** c_param))
if (M_upper > 1 / alpha) or (M_lower > 1 / alpha):
print(f"Identify bad user with {len(p_upper)} votes")
flag = True
break
if flag:
bad_user_list.append({"user_id": user, "votes": len(p_upper)})
print("Bad user length: ", len(bad_user_list))
print(bad_user_list)
bad_user_id_list = [x["user_id"] for x in bad_user_list]
# remove bad users
battles = battles[~battles["judge"].isin(bad_user_id_list)]
return battles
def fit_mle_elo(X, Y, models, indices=None, SCALE=400, INIT_RATING=1000):
from sklearn.linear_model import LogisticRegression
p = len(models.index)
lr = LogisticRegression(fit_intercept=False)
if indices:
lr.fit(X[indices], Y[indices])
else:
lr.fit(X, Y)
elo_scores = SCALE * lr.coef_[0] + INIT_RATING
# calibrate llama-13b to 800 if applicable
if "mixtral-8x7b-instruct-v0.1" in models.index:
elo_scores += 1114 - elo_scores[models["mixtral-8x7b-instruct-v0.1"]]
return (
pd.Series(elo_scores[:p], index=models.index).sort_values(ascending=False),
lr.coef_[0][p:],
)
def construct_style_matrices(
df,
BASE=10,
apply_ratio=[1, 1, 1, 1],
style_elements=STYLE_CONTROL_ELEMENTS_V1,
add_one=True,
):
models = pd.concat([df["model_a"], df["model_b"]]).unique()
models = pd.Series(np.arange(len(models)), index=models)
# duplicate battles
df = pd.concat([df, df], ignore_index=True)
p = len(models.index)
n = df.shape[0]
assert len(style_elements) % 2 == 0
k = int(len(style_elements) / 2)
X = np.zeros([n, p + k])
X[np.arange(n), models[df["model_a"]]] = +math.log(BASE)
X[np.arange(n), models[df["model_b"]]] = -math.log(BASE)
# creates turn each of the specified column in "conv_metadata" into a vector
style_vector = np.array(
[
df.conv_metadata.map(
lambda x: x[element]
if type(x[element]) is int
else sum(x[element].values())
).tolist()
for element in style_elements
]
)
style_diff = (style_vector[:k] - style_vector[k:]).astype(float)
style_sum = (style_vector[:k] + style_vector[k:]).astype(float)
if add_one:
style_sum = style_sum + np.ones(style_diff.shape)
apply_ratio = np.flatnonzero(apply_ratio)
style_diff[apply_ratio] /= style_sum[
apply_ratio
] # Apply ratio where necessary (length, etc)
style_mean = np.mean(style_diff, axis=1)
style_std = np.std(style_diff, axis=1)
X[:, -k:] = ((style_diff - style_mean[:, np.newaxis]) / style_std[:, np.newaxis]).T
# one A win => two A win
Y = np.zeros(n)
Y[df["winner"] == "model_a"] = 1.0
# one tie => one A win + one B win
# find tie + tie (both bad) index
tie_idx = (df["winner"] == "tie") | (df["winner"] == "tie (bothbad)")
tie_idx[len(tie_idx) // 2 :] = False
Y[tie_idx] = 1.0
return X, Y, models
def get_bootstrap_result_style_control(
X, Y, battles, models, func_compute_elo, num_round=1000
):
elos = []
coefs = []
assert X.shape[0] % 2 == 0 and X.shape[0] == Y.shape[0]
k = int(
X.shape[0] / 2
) # Since we duplicate the battles when constructing X and Y, we don't want to sample the duplicates
battles_tie_idx = (battles["winner"] == "tie") | (
battles["winner"] == "tie (bothbad)"
)
for _ in tqdm(range(num_round), desc="bootstrap"):
indices = np.random.choice(list(range(k)), size=(k), replace=True)
index2tie = np.zeros(k, dtype=bool)
index2tie[battles_tie_idx] = True
nontie_indices = indices[~index2tie[indices]]
tie_indices = np.concatenate(
[indices[index2tie[indices]], indices[index2tie[indices]] + k]
)
_X = np.concatenate([X[nontie_indices], X[nontie_indices], X[tie_indices]])
_Y = np.concatenate([Y[nontie_indices], Y[nontie_indices], Y[tie_indices]])
assert _X.shape == X.shape and _Y.shape == Y.shape
states = ~_X[:, : len(models)].any(axis=0)
elo, coef = func_compute_elo(_X, _Y, models=models[~states])
elos.append(elo)
coefs.append(coef)
df = pd.DataFrame(elos)
return df[df.median().sort_values(ascending=False).index], coefs
def filter_long_conv(row):
threshold = 768
for conversation_type in ["conversation_a", "conversation_b"]:
cur_conv = row[conversation_type]
num_tokens_all = sum([turn["num_tokens"] for turn in cur_conv])
if num_tokens_all >= threshold:
return True
return False
def report_elo_analysis_results(
battles_json,
rating_system="bt",
num_bootstrap=100,
exclude_models=[],
langs=[],
exclude_tie=False,
exclude_unknown_lang=False,
daily_vote_per_user=None,
run_outlier_detect=False,
scale=1,
filter_func=lambda x: True,
style_control=False,
):
battles = pd.DataFrame(battles_json)
tqdm.pandas(desc=f"Processing using {filter_func.__name__}")
filtered_indices = battles.progress_apply(filter_func, axis=1)
battles = battles[filtered_indices]
battles = battles.sort_values(ascending=True, by=["tstamp"])
if len(langs) > 0:
battles = battles[battles["language"].isin(langs)]
if exclude_unknown_lang:
battles = battles[~battles["language"].str.contains("unknown")]
# remove excluded models
battles = battles[
~(
battles["model_a"].isin(exclude_models)
| battles["model_b"].isin(exclude_models)
)
]
# Only use anonymous votes
battles = battles[battles["anony"]].reset_index(drop=True)
battles_no_ties = battles[~battles["winner"].str.contains("tie")]
if exclude_tie:
battles = battles_no_ties
if daily_vote_per_user is not None:
battles = limit_user_votes(battles, daily_vote_per_user)
if run_outlier_detect:
model_pair_stats = get_model_pair_stats(battles)
battles = outlier_detect(model_pair_stats, battles)
print(f"Number of battles: {len(battles)}")
# Online update
elo_rating_online = compute_elo(battles)
if rating_system == "bt":
if style_control:
X, Y, models = construct_style_matrices(battles)
bootstrap_df, boostrap_coef = get_bootstrap_result_style_control(
X, Y, battles, models, fit_mle_elo, num_round=num_bootstrap
)
elo_rating_final, coef_final = fit_mle_elo(X, Y, models)
else:
bootstrap_df = get_bootstrap_result(
battles, compute_elo_mle_with_tie, num_round=num_bootstrap
)
elo_rating_final = compute_elo_mle_with_tie(battles)
elif rating_system == "elo":
bootstrap_df = get_bootstrap_result(
battles, compute_elo, num_round=num_bootstrap
)
elo_rating_median = get_median_elo_from_bootstrap(bootstrap_df)
elo_rating_final = elo_rating_median
model_order = list(elo_rating_final.keys())
model_rating_q025 = bootstrap_df.quantile(0.025)
model_rating_q975 = bootstrap_df.quantile(0.975)
# compute ranking based on CI
ranking = {}
for i, model_a in enumerate(model_order):
ranking[model_a] = 1
for j, model_b in enumerate(model_order):
if i == j:
continue
if model_rating_q025[model_b] > model_rating_q975[model_a]:
ranking[model_a] += 1
# leaderboard_table_df: elo rating, variance, 95% interval, number of battles
leaderboard_table_df = pd.DataFrame(
{
"rating": elo_rating_final,
"variance": bootstrap_df.var(),
"rating_q975": bootstrap_df.quantile(0.975),
"rating_q025": bootstrap_df.quantile(0.025),
"num_battles": battles["model_a"]
.value_counts()
.add(battles["model_b"].value_counts(), fill_value=0),
"final_ranking": pd.Series(ranking),
}
)
model_order.sort(key=lambda k: -elo_rating_final[k])
limit_show_number = int(25 * scale)
model_order = model_order[:limit_show_number]
# Plots
leaderboard_table = visualize_leaderboard_table(elo_rating_final)
win_fraction_heatmap = visualize_pairwise_win_fraction(
battles_no_ties, model_order, scale=scale
)
battle_count_heatmap = visualize_battle_count(
battles_no_ties, model_order, scale=scale
)
average_win_rate_bar = visualize_average_win_rate(
battles_no_ties, limit_show_number, scale=scale
)
bootstrap_elo_rating = visualize_bootstrap_elo_rating(
bootstrap_df, elo_rating_final, limit_show_number, scale=scale
)
last_updated_tstamp = battles["tstamp"].max()
last_updated_datetime = datetime.datetime.fromtimestamp(
last_updated_tstamp, tz=timezone("US/Pacific")
).strftime("%Y-%m-%d %H:%M:%S %Z")
return {
"rating_system": rating_system,
"elo_rating_online": elo_rating_online,
"elo_rating_final": elo_rating_final,
"leaderboard_table": leaderboard_table,
"win_fraction_heatmap": win_fraction_heatmap,
"battle_count_heatmap": battle_count_heatmap,
"average_win_rate_bar": average_win_rate_bar,
"bootstrap_elo_rating": bootstrap_elo_rating,
"last_updated_datetime": last_updated_datetime,
"last_updated_tstamp": last_updated_tstamp,
"bootstrap_df": bootstrap_df,
"leaderboard_table_df": leaderboard_table_df,
"style_coefficients": {
"bootstrap": np.vstack(boostrap_coef),
"final": coef_final,
}
if rating_system == "bt" and style_control
else {},
}
def pretty_print_elo_rating(rating):
model_order = list(rating.keys())
model_order.sort(key=lambda k: -rating[k])
for i, model in enumerate(model_order):
print(f"{i+1:2d}, {model:25s}, {rating[model]:.0f}")
if __name__ == "__main__":
parser = argparse.ArgumentParser()
parser.add_argument("--clean-battle-file", type=str)
parser.add_argument("--max-num-files", type=int)
parser.add_argument("--num-bootstrap", type=int, default=100)
parser.add_argument(
"--rating-system", type=str, choices=["bt", "elo"], default="bt"
)
parser.add_argument("--exclude-models", type=str, nargs="+", default=[])
parser.add_argument("--exclude-tie", action="store_true", default=False)
parser.add_argument("--exclude-unknown-lang", action="store_true", default=False)
parser.add_argument("--exclude-url", action="store_true", default=False)
parser.add_argument("--langs", type=str, nargs="+", default=[])
parser.add_argument("--daily-vote-per-user", type=int, default=None)
parser.add_argument("--run-outlier-detect", action="store_true", default=False)
parser.add_argument("--category", nargs="+", default=["full"])
parser.add_argument("--scale", type=float, default=1)
parser.add_argument("--style-control", action="store_true")
args = parser.parse_args()
np.random.seed(42)
if args.clean_battle_file:
# Read data from a cleaned battle files
battles = pd.read_json(args.clean_battle_file)
else:
# Read data from all log files
log_files = get_log_files(args.max_num_files)
battles = clean_battle_data(log_files)
filter_func_map = {
"full": lambda x: True,
"long": filter_long_conv,
"chinese": lambda x: x["language"] == "Chinese",
"english": lambda x: x["language"] == "English",
}
assert all(
[cat in filter_func_map for cat in args.category]
), f"Invalid category: {args.category}"
results = {}
for cat in args.category:
filter_func = filter_func_map[cat]
results[cat] = report_elo_analysis_results(
battles,
rating_system=args.rating_system,
num_bootstrap=args.num_bootstrap,
exclude_models=args.exclude_models,
langs=args.langs,
exclude_tie=args.exclude_tie,
exclude_unknown_lang=args.exclude_unknown_lang,
daily_vote_per_user=args.daily_vote_per_user,
run_outlier_detect=args.run_outlier_detect,
scale=args.scale,
filter_func=filter_func,
style_control=args.style_control,
)
for cat in args.category:
print(f"# Results for {cat} conversations")
print("# Online Elo")
pretty_print_elo_rating(results[cat]["elo_rating_online"])
print("# Median")
pretty_print_elo_rating(results[cat]["elo_rating_final"])
print(f"last update : {results[cat]['last_updated_datetime']}")
last_updated_tstamp = results[cat]["last_updated_tstamp"]
cutoff_date = datetime.datetime.fromtimestamp(
last_updated_tstamp, tz=timezone("US/Pacific")
).strftime("%Y%m%d")
print(f"last update : {cutoff_date}")
with open(f"elo_results_{cutoff_date}.pkl", "wb") as fout:
pickle.dump(results, fout)