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SnapGraph.py
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SnapGraph.py
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# -*- coding: utf-8 -*-
"""
@Time ： 2022/5/25 11:25
@Auth ： qianzekai
@stuId:1190202011
@File ：SnapGraph.py
@IDE ：PyCharm
"""
import random
import sqlite3
import snap
def getAttribute(origin_file):
min_num = float("inf")
max_num = float("-inf")
records_num = 0
with open(origin_file, "r", encoding="utf8") as f:
for line in f:
if records_num % 1000 == 0:
print("handel{}num".format(records_num))
records_num += 1
source, des = line.strip().split()
source = int(source)
des = int(des)
max_n = max(source, des)
min_n = min(source, des)
if max_n > max_num:
max_num = max_n
if min_n < min_num:
min_num = min_n
print("record{}，max{}，min{}".format(records_num, max_num, min_num))
def LoadTwitter(twitter_user_file, db_file):
conn = sqlite3.connect(db_file)
cursor = conn.cursor()
try:
conn.execute("CREATE TABLE Twitter_user (source, destination)")
conn.execute("create index Twitter_user_destination_index on Twitter_user(destination)")
conn.execute("create index Twitter_user_source_index on Twitter_user(source)")
conn.commit()
except:
conn.execute("DROP TABLE Twitter_user;")
conn.execute("CREATE TABLE Twitter_user (source, destination)")
conn.execute("create index Twitter_user_destination_index on Twitter_user(destination)")
conn.execute("create index Twitter_user_source_index on Twitter_user(source)")
conn.commit()
conn.execute('PRAGMA synchronous = OFF')
print("开始插入twitter数据...")
with open(twitter_user_file, "r", encoding="utf8") as f:
datas = []
for num, line in enumerate(f):
if num % 1000000 == 0:
print("Twitter数据已插入{}条".format(num))
s, d = line.strip().split()
datas.append((int(s), int(d)))
conn.executemany("INSERT INTO Twitter_user"
"(source, destination) VALUES(?,?)", datas)
datas.clear()
else:
s, d = line.strip().split()
datas.append((int(s), int(d)))
if len(datas) > 0:
conn.executemany("INSERT INTO Twitter_user"
"(source, destination) VALUES(?,?)", datas)
conn.commit()
f.close()
def LoadUserLike(user_like_file, db_file, k):
conn = sqlite3.connect(db_file)
cursor = conn.cursor()
sqlcreate = "CREATE TABLE userLike (source constraint userLike_pk primary key,"
for i in range(k - 1):
sqlcreate += "like" + str(i + 1) + ","
sqlcreate += "like" + str(k) + ")"
try:
conn.execute(sqlcreate)
conn.commit()
except:
conn.execute("DROP TABLE userLike;")
conn.execute(sqlcreate)
conn.commit()
conn.execute('PRAGMA synchronous = OFF')
print("开始插入Like数据...")
with open(user_like_file, "r", encoding="utf8") as f:
datas = []
for num, line in enumerate(f):
if num % 10000 == 0:
print("Like数据已插入{}条".format(num))
a = line.strip().split()
s = a[0];
# print(s);
data = []
data.append(int(s))
for i in range(k):
data.append(a[i + 1])
datas.append(data)
sqlinsert = "INSERT INTO userLike (source,"
for i in range(k - 1):
sqlinsert += "like" + str(i + 1) + ","
sqlinsert += "like" + str(k) + ")VALUES("
for i in range(k - 1):
sqlinsert += "?,"
sqlinsert += "?,?)"
conn.executemany(sqlinsert, datas)
datas.clear()
else:
data = []
a = line.strip().split()
s = a[0];
data.append(int(s))
for i in range(k):
data.append(a[i + 1])
datas.append(data)
if len(datas) > 0:
sqlinsert = "INSERT INTO userLike (source,"
for i in range(k - 1):
sqlinsert += "like" + str(i + 1) + ","
sqlinsert += "like" + str(k) + ")VALUES("
for i in range(k - 1):
sqlinsert += "?,"
sqlinsert += "?,?)"
conn.executemany(sqlinsert, datas)
conn.commit()
f.close()
def CreateUserLike(user_like_file, db_file, k):
conn = sqlite3.connect(db_file)
cursor = conn.cursor()
sqlcreate = "CREATE TABLE userLike (source constraint userLike_pk primary key,"
for i in range(k - 1):
sqlcreate += "like" + str(i + 1) + ","
sqlcreate += "like" + str(k) + ")"
try:
conn.execute(sqlcreate)
conn.commit()
except:
conn.execute("DROP TABLE userLike;")
conn.execute(sqlcreate)
conn.commit()
conn.execute('PRAGMA synchronous = OFF')
print("开始插入Like数据...")
with open(user_like_file, "r", encoding="utf8") as f:
datas = []
for num, line in enumerate(f):
if num % 10000 == 0:
print("Like数据已插入{}条".format(num))
s = line.strip().split()
# print(s);
data = []
data.append(int(s[0]))
for i in range(k):
data.append(random.uniform(.5, .6))
datas.append(data)
sqlinsert = "INSERT INTO userLike (source,"
for i in range(k - 1):
sqlinsert += "like" + str(i + 1) + ","
sqlinsert += "like" + str(k) + ")VALUES("
for i in range(k - 1):
sqlinsert += "?,"
sqlinsert += "?,?)"
conn.executemany(sqlinsert, datas)
datas.clear()
else:
data = []
s = line.strip().split()
data.append(int(s[0]))
for i in range(k):
data.append(random.uniform(.5, .6))
datas.append(data)
if len(datas) > 0:
sqlinsert = "INSERT INTO userLike (source,"
for i in range(k - 1):
sqlinsert += "like" + str(i + 1) + ","
sqlinsert += "like" + str(k) + ")VALUES("
for i in range(k - 1):
sqlinsert += "?,"
sqlinsert += "?,?)"
conn.executemany(sqlinsert, datas)
conn.commit()
f.close()
def getGraph(origin_file, save_file):
print("begin get graph...")
f = open(save_file, "w+", encoding="utf8")
graph = snap.LoadEdgeList(snap.PNGraph, origin_file, 0, 1) # 构建图
print("end get graph,get users......")
for node in graph.Nodes():
if node.GetInDeg() > 1000:
# for item in node.GetOutEdges():
# f.write(str(node.GetId()) + " " + str(item)+" "+str(node.GetInDeg()) + "\n")
for item in node.GetInEdges():
# print(str(node.GetId()))
f.write(str(item) + " " + str(node.GetId()) + " " + str(node.GetInDeg()) + "\n")
f.close()
print("end getGraph")
def creatLikeData(origin_file, db_file, k):
mu = 0
sigma = 0.05
like = [0] * 10
count = 0;
conn = sqlite3.connect(db_file)
print("begin get graph...")
graph = snap.LoadEdgeList(snap.PNGraph, origin_file, 0, 1) # 构建图
print("end get graph,get allusers'like......")
for node in graph.Nodes():
count += 1
print("Total user 77097 or 5000,has update" + str(count) + ", NowupdateId=" + str(
node.GetId()) + ",need update " + str(
node.GetInDeg()))
for item in node.GetInEdges():
p = "select * from userLike where " + str(node.GetId()) + "=""userLike.source"
# print(p)
pr = conn.execute(p)
q = "select * from userLike where " + str(item) + "=""userLike.source"
qr = conn.execute(q)
for result1 in pr:
for result2 in qr:
for i in range(k):
like[i] = ((result2[i + 1] + result1[i + 1] + random.gauss(mu, sigma)) / 2)
sqlupdate = "UPDATE userLike set "
for i in range(k - 1):
sqlupdate += "like" + str(i + 1) + "=" + str(like[i]) + ","
sqlupdate += "like" + str(k) + "=" + str(like[k - 1]) + " where source=" + str(item)
# print(sqlupdate)
conn.execute(sqlupdate)
conn.commit()
# f.write(str(item) + " " + str(node.GetId())+" "+str(node.GetInDeg()) + "\n")
print("end getGraph")
if __name__ == "__main__":
LoadTwitter("smalldata.txt", "small_data.db")
# getGraph("smalldata.txt", "popular_user.txt")
# LoadUserLike("user_like.txt", "twitter_data.db", 10);
CreateUserLike("smalluserlike.txt", "small_data.db", 5);
creatLikeData("smalldata.txt", "small_data.db", 5)