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promoteTweets.py
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promoteTweets.py
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#!/usr/bin/python
# tweets promotion baseline algorithm
# let us assume each user's retweet action is modeled by Gamma
# and in the situation of lacking data, we for now assume users and homogeneous.
# A simplified verions of patented MBT algorithm
# Copyright (c) 2013 All Right Reserved, Voxsup Inc.
import sys
import os
import string
import json
import numpy as np
import math
import random
# 1: promote, -1: not to promote, 0: it doesn't know what to do.
#@@@@@@ TO USERS@@@@@@@@
#
# $ python ./promoteTweets.py
# only need to modify SAMPLE, DATA,MCMCsteps,RESULTS
#
#
# assume all tweets from the same account and therefore their reach is assumeds to be equal.
# sample data contains multiple tweets. each tweet can have different number of datapoints.
"""
@@@@@@ sample output. the tweet with highest score is the best to promote. so sort the tweets in descending order
result prints the convergence in Gamma parameter space.
ONly the final values matter.
{'tweet3': 1, 'tweet2': 1, 'tweet1': 3, 'tweet4': 1}
{'tweet3': 11, 'tweet2': 11, 'tweet1': 33, 'tweet4': 11}
{'tweet3': 21, 'tweet2': 21, 'tweet1': 63, 'tweet4': 21}
{'tweet3': 31, 'tweet2': 23, 'tweet1': 81, 'tweet4': 31}
{'tweet3': 41, 'tweet2': 13, 'tweet1': 73, 'tweet4': 41}
{'tweet3': 51, 'tweet2': 3, 'tweet1': 63, 'tweet4': 51}
{'tweet3': 61, 'tweet2': -7, 'tweet1': 53, 'tweet4': 61}
{'tweet3': 71, 'tweet2': -17, 'tweet1': 43, 'tweet4': 71}
{'tweet3': 81, 'tweet2': -27, 'tweet1': 33, 'tweet4': 81}
{'tweet3': 91, 'tweet2': -37, 'tweet1': 23, 'tweet4': 91}
{'tweet3': 101, 'tweet2': -47, 'tweet1': -1, 'tweet4': 101}
{'tweet3': 111, 'tweet2': -57, 'tweet1': -31, 'tweet4': 111}
{'tweet3': 107, 'tweet2': -67, 'tweet1': -61, 'tweet4': 121}
{'tweet3': 97, 'tweet2': -77, 'tweet1': -91, 'tweet4': 131}
{'tweet3': 87, 'tweet2': -87, 'tweet1': -121, 'tweet4': 141}
{'tweet3': 77, 'tweet2': -97, 'tweet1': -151, 'tweet4': 151}
{'tweet3': 67, 'tweet2': -107, 'tweet1': -181, 'tweet4': 161}
{'tweet3': 57, 'tweet2': -117, 'tweet1': -211, 'tweet4': 171}
{'tweet3': 47, 'tweet2': -127, 'tweet1': -241, 'tweet4': 181}
{'tweet3': 37, 'tweet2': -137, 'tweet1': -271, 'tweet4': 191}
{'tweet3': 27, 'tweet2': -147, 'tweet1': -301, 'tweet4': 201}
{'tweet3': 17, 'tweet2': -157, 'tweet1': -331, 'tweet4': 211}
{'tweet3': 7, 'tweet2': -167, 'tweet1': -361, 'tweet4': 221}
{'tweet3': -3, 'tweet2': -177, 'tweet1': -391, 'tweet4': 231}
{'tweet3': -13, 'tweet2': -187, 'tweet1': -421, 'tweet4': 241}
{'tweet3': -23, 'tweet2': -197, 'tweet1': -451, 'tweet4': 251}
{'tweet3': -33, 'tweet2': -207, 'tweet1': -481, 'tweet4': 261}
{'tweet3': -43, 'tweet2': -217, 'tweet1': -511, 'tweet4': 271}
{'tweet3': -53, 'tweet2': -227, 'tweet1': -541, 'tweet4': 281}
{'tweet3': -63, 'tweet2': -237, 'tweet1': -571, 'tweet4': 291}
{'tweet3': -73, 'tweet2': -247, 'tweet1': -601, 'tweet4': 301}
{'tweet3': -83, 'tweet2': -257, 'tweet1': -631, 'tweet4': 311}
{'tweet3': -93, 'tweet2': -267, 'tweet1': -661, 'tweet4': 321}
{'tweet3': -103, 'tweet2': -277, 'tweet1': -691, 'tweet4': 331}
{'tweet3': -113, 'tweet2': -287, 'tweet1': -721, 'tweet4': 341}
{'tweet3': -123, 'tweet2': -297, 'tweet1': -751, 'tweet4': 341}
{'tweet3': -133, 'tweet2': -307, 'tweet1': -781, 'tweet4': 331}
{'tweet3': -143, 'tweet2': -317, 'tweet1': -811, 'tweet4': 321}
{'tweet3': -153, 'tweet2': -327, 'tweet1': -841, 'tweet4': 311}
{'tweet3': -163, 'tweet2': -337, 'tweet1': -871, 'tweet4': 301}
{'tweet3': -173, 'tweet2': -347, 'tweet1': -901, 'tweet4': 291}
{'tweet3': -183, 'tweet2': -357, 'tweet1': -931, 'tweet4': 281}
{'tweet3': -193, 'tweet2': -367, 'tweet1': -961, 'tweet4': 271}
{'tweet3': -203, 'tweet2': -377, 'tweet1': -991, 'tweet4': 261}
{'tweet3': -213, 'tweet2': -387, 'tweet1': -1021, 'tweet4': 251}
{'tweet3': -223, 'tweet2': -397, 'tweet1': -1051, 'tweet4': 241}
{'tweet3': -233, 'tweet2': -407, 'tweet1': -1081, 'tweet4': 231}
{'tweet3': -243, 'tweet2': -417, 'tweet1': -1111, 'tweet4': 221}
{'tweet3': -253, 'tweet2': -427, 'tweet1': -1141, 'tweet4': 211}
{'tweet3': -263, 'tweet2': -437, 'tweet1': -1171, 'tweet4': 201}
"""
SAMPLE= 1000 # REACH should be larger and any value_dimension values.
MCMCsteps = 500
DATA={'339824552404217856': [
# original input
{'vd1': 1, 'cd1': 520539},
{'vd1': 100, 'cd1': 521439},
{'vd1': 1, 'cd1': 522339},
{'vd1': 10000, 'cd1': 523239},
{'vd1': 1, 'cd1': 591639},
# dilute in time by minute
{'vd1': 1, 'cd1': 520539/60.0},
{'vd1': 100, 'cd1': 521439/60.0},
{'vd1': 1, 'cd1': 522339/60.0},
{'vd1': 10000, 'cd1': 523239/60.0},
{'vd1': 1, 'cd1': 591639/60.0},
# dilute in time by hour
{'vd1': 1, 'cd1': 520539/60.0/60.0},
{'vd1': 100, 'cd1': 521439/60.0/60.0},
{'vd1': 1, 'cd1': 522339/60.0/60.0},
{'vd1': 10000, 'cd1': 523239/60.0/60.0},
{'vd1': 1, 'cd1': 591639/60.0/60.0}
],
'341995162706259968': [
#original input
{'vd1': 0, 'cd1': 3025},
{'vd1': 0, 'cd1': 3925},
{'vd1': 0, 'cd1': 4825},
{'vd1': 0, 'cd1': 5725},
{'vd1': 0, 'cd1': 74125},
#dilute by minute
{'vd1': 0, 'cd1': 3025/60.0},
{'vd1': 0, 'cd1': 3925/60.0},
{'vd1': 0, 'cd1': 4825/60.0},
{'vd1': 0, 'cd1': 5725/60.0},
{'vd1': 0, 'cd1': 74125/60.0},
# dilute by hour
{'vd1': 0, 'cd1': 3025/60.0/60.0},
{'vd1': 0, 'cd1': 3925/60.0/60.0},
{'vd1': 0, 'cd1': 4825/60.0/60.0},
{'vd1': 0, 'cd1': 5725/60.0/60.0},
{'vd1': 0, 'cd1': 74125/60.0/60.0}
]
}
METRIC = {"cost_dimension_1":"time_elapsed_since_creation","value_dimension_1":"num_of_retweets"} # FYI
INIT_GAMMA={"shape":2.,"scale":2.} # initial Gamma distribution
RESULTS = {"339824552404217856":0,
"341995162706259968":0
}
# for tweet1: x1,...,x12 <= 10, 10< x13,...,x42<=20,
# 20 < x43,....x10000 < 200000
# all xi's are iid Gamma. The goal is to estimate Gamma's parameters
def drawGammaTest( shape, scale ):
s = np.random.gamma(shape, scale, SAMPLE)
for t in DATA.keys():
for row in DATA[t]:
cut_off = row['cd1']
# count the samples, whose response time is below cut off
res = sum([1 if val < cut_off else 0 for val in s ])
if res < row['vd1'] or SAMPLE < row['vd1']:
RESULTS[t] += 1 # being greater than means meets or exceeds expectation
else:
RESULTS[t] -= 1
### RESULTS = {"tweet1":1,"tweet2":1,.....}
#return sum(RESULTS) #
def MCMCitr( steps ):
for i in xrange(steps):
if (INIT_GAMMA['shape'] > 0 and INIT_GAMMA['scale'] > 0 ):
drawGammaTest(INIT_GAMMA['shape'],INIT_GAMMA['scale'])
INIT_GAMMA['shape'] += random.random() - 0.44
INIT_GAMMA['scale'] += random.random() - 0.44
if i%10 == 0:
print RESULTS
MCMCitr(MCMCsteps)