Dota API, Get match history by sequence number

GetMatchHistoryBySequenceNum.py

import requests, json, pickle, time, datetime, sqlite3 as lite, sys

steamKeyFileName = 'steamwebapikey.txt'
matchesFileName = 'matches.pkl'

# get steam api key
try:
    steamKeyFile = open(steamKeyFileName, 'rb')
    steamKey = pickle.load(steamKeyFile)
    steamKeyFile.close()
except:
    print "Steam API Key:",
    steamKey = raw_input()
    steamKeyFile = open(steamKeyFileName, 'wb')
    pickle.dump(steamKey, steamKeyFile)
    steamKeyFile.close()

# connect to API
client = requests.session()
address = r'https://api.steampowered.com/IDOTA2Match_570/GetMatchHistoryBySequenceNum/v0001/'

# initialise database for local storage
con = lite.connect('matches.db')
with con:    
    cur = con.cursor()
#    cur.execute("DROP TABLE IF EXISTS Matches")
#    cur.execute("CREATE TABLE Matches(match_id INT PRIMARY KEY, match_seq_num INT, start_time INT, duration INT, game_mode INT, lobby_type INT, leagueid INT, human_players INT, player0_hero_id INT, player1_hero_id INT, player2_hero_id INT, player3_hero_id INT, player4_hero_id INT, player5_hero_id INT, player6_hero_id INT, player7_hero_id INT, player8_hero_id INT, player9_hero_id INT, radiant_win INT)")

startId = 501088752
numPages = 1000
fails = 0
for i in range(numPages):
    parameters = {'key': steamKey, 'start_at_match_seq_num': startId}    
    r = client.get(address, params=parameters)
    page = json.loads(r.content)['result']['matches']
    for match in page:
        try:
            matchData = [ match['match_id'], match['match_seq_num'], match['start_time'], match['duration'], match['game_mode'], match['lobby_type'], match['leagueid'], match['human_players'] ] 
            playerData = [-1]*10
            for p in range(10):
                if match['players'][p]['player_slot'] < 128: 
                    teamOffset = 0 
                else:
                    teamOffset = 5
                    match['players'][p]['player_slot'] -= 128
                playerData[match['players'][p]['player_slot']+teamOffset] = match['players'][p]['hero_id']
            matchData.extend(playerData)
            matchData.append(match['radiant_win'])
            print(datetime.datetime.fromtimestamp(match['start_time']).strftime('%Y-%m-%d %H:%M:%S')), matchData
            cur.execute("INSERT INTO Matches VALUES(?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)", matchData)
            con.commit()
        except:
            print "Failed to add match."
            fails += 1
    startId = page[-1]['match_seq_num'] + 1
    print 'End of page', i+1
    time.sleep(1)
con.close()
if fails > 0: print "Encountered " + str(fails) + " matches that could not be added."