linux - permutation with two sets in itertools using python -

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i having trouble in rewriting length python code in more pythonic way. here have tried, contains example how want final code like

#!/usr/bin/env python  import time import itertools import os  freq = [2400000,2000000,1600000,1200000,800000]  freq_set = [         [ in itertools.combinations(freq,1)],         [ in itertools.combinations(freq,2)],         [ in itertools.combinations(freq,3)],         [ in itertools.combinations(freq,4)]         ]  cores = [[0,4],[1,5],[2,6],[3,7]]  sets = [[0,4],[0,4,1,5],[0,4,1,5,2,6],[0,4,1,5,2,6,3,7]]  # 5 10 10 5 ; 1 3 5 7 freq_set_val in range(0, len(freq_set)):         if freq_set_val == 0:                 change = "echo "+ freq_set[freq_set_val][0] +"> /sys/devices/system/cpu/cpu"+ sets[freq_set_val][0] + "/cpufreq/scaling_setspeed"                 change = "echo "+ freq_set[freq_set_val][0] +"> /sys/devices/system/cpu/cpu"+ sets[freq_set_val][1] + "/cpufreq/scaling_setspeed"                 print "do something"                 change = "echo "+ freq_set[freq_set_val][1] +"> /sys/devices/system/cpu/cpu"+ sets[freq_set_val][0] + "/cpufreq/scaling_setspeed"                 change = "echo "+ freq_set[freq_set_val][1] +"> /sys/devices/system/cpu/cpu"+ sets[freq_set_val][1] + "/cpufreq/scaling_setspeed"                 print "do something"                 change = "echo "+ freq_set[freq_set_val][2] +"> /sys/devices/system/cpu/cpu"+ sets[freq_set_val][0] + "/cpufreq/scaling_setspeed"                 change = "echo "+ freq_set[freq_set_val][2] +"> /sys/devices/system/cpu/cpu"+ sets[freq_set_val][1] + "/cpufreq/scaling_setspeed"                 print "do something"                 change = "echo "+ freq_set[freq_set_val][3] +"> /sys/devices/system/cpu/cpu"+ sets[freq_set_val][0] + "/cpufreq/scaling_setspeed"                 change = "echo "+ freq_set[freq_set_val][3] +"> /sys/devices/system/cpu/cpu"+ sets[freq_set_val][1] + "/cpufreq/scaling_setspeed"                 print "do something"                 change = "echo "+ freq_set[freq_set_val][4] +"> /sys/devices/system/cpu/cpu"+ sets[freq_set_val][0] + "/cpufreq/scaling_setspeed"                 change = "echo "+ freq_set[freq_set_val][4] +"> /sys/devices/system/cpu/cpu"+ sets[freq_set_val][1] + "/cpufreq/scaling_setspeed"                 print "do something"         if freq_set_val == 1:                 change = "echo "+ freq_set[freq_set_val][0] +"> /sys/devices/system/cpu/cpu"+ sets[freq_set_val][0] + "/cpufreq/scaling_setspeed"                 change = "echo "+ freq_set[freq_set_val][0] +"> /sys/devices/system/cpu/cpu"+ sets[freq_set_val][1] + "/cpufreq/scaling_setspeed"                 change = "echo "+ freq_set[freq_set_val][1] +"> /sys/devices/system/cpu/cpu"+ sets[freq_set_val][2] + "/cpufreq/scaling_setspeed"                 change = "echo "+ freq_set[freq_set_val][1] +"> /sys/devices/system/cpu/cpu"+ sets[freq_set_val][3] + "/cpufreq/scaling_setspeed"                 print "do something"                 change = "echo "+ freq_set[freq_set_val][1] +"> /sys/devices/system/cpu/cpu"+ sets[freq_set_val][0] + "/cpufreq/scaling_setspeed"                 change = "echo "+ freq_set[freq_set_val][1] +"> /sys/devices/system/cpu/cpu"+ sets[freq_set_val][1] + "/cpufreq/scaling_setspeed"                 change = "echo "+ freq_set[freq_set_val][2] +"> /sys/devices/system/cpu/cpu"+ sets[freq_set_val][2] + "/cpufreq/scaling_setspeed"                 change = "echo "+ freq_set[freq_set_val][2] +"> /sys/devices/system/cpu/cpu"+ sets[freq_set_val][3] + "/cpufreq/scaling_setspeed"                 print "do something"                 change = "echo "+ freq_set[freq_set_val][2] +"> /sys/devices/system/cpu/cpu"+ sets[freq_set_val][0] + "/cpufreq/scaling_setspeed"                 change = "echo "+ freq_set[freq_set_val][2] +"> /sys/devices/system/cpu/cpu"+ sets[freq_set_val][1] + "/cpufreq/scaling_setspeed"                 change = "echo "+ freq_set[freq_set_val][3] +"> /sys/devices/system/cpu/cpu"+ sets[freq_set_val][2] + "/cpufreq/scaling_setspeed"                 change = "echo "+ freq_set[freq_set_val][3] +"> /sys/devices/system/cpu/cpu"+ sets[freq_set_val][3] + "/cpufreq/scaling_setspeed"                 print "do something"                  print "so onn"         if freq_set_val == 2:                  change = "echo "+ freq_set[freq_set_val][0] +"> /sys/devices/system/cpu/cpu"+ sets[freq_set_val][0] + "/cpufreq/scaling_setspeed"                 change = "echo "+ freq_set[freq_set_val][0] +"> /sys/devices/system/cpu/cpu"+ sets[freq_set_val][1] + "/cpufreq/scaling_setspeed"                 change = "echo "+ freq_set[freq_set_val][1] +"> /sys/devices/system/cpu/cpu"+ sets[freq_set_val][2] + "/cpufreq/scaling_setspeed"                 change = "echo "+ freq_set[freq_set_val][1] +"> /sys/devices/system/cpu/cpu"+ sets[freq_set_val][3] + "/cpufreq/scaling_setspeed"                 change = "echo "+ freq_set[freq_set_val][2] +"> /sys/devices/system/cpu/cpu"+ sets[freq_set_val][4] + "/cpufreq/scaling_setspeed"                 change = "echo "+ freq_set[freq_set_val][2] +"> /sys/devices/system/cpu/cpu"+ sets[freq_set_val][5] + "/cpufreq/scaling_setspeed"                 print "do something"

essentially want keep flipping set of cores particular frequency level. after every change statement. write os.system(change)

could please me out here? tried implementing same using shell. problem not having itertools package. please feel free change title of question did not know how phrase it.

this how looks now. prettier version better :) did not know how enhance it

for freq_set_val in range(0, len(freq_set)):         if freq_set_val == 0:                 freq in range(0, len(freq_set[freq_set_val])):                         val in range(0, len(freq_set[freq_set_val][freq])):                                 change = "echo "+ str(freq_set[freq_set_val][freq][val]) +"> /sys/devices/system/cpu/cpu"+ str(sets[freq_set_val][0]) + "/cpufreq/scaling_setspeed"                                 change = "echo "+ str(freq_set[freq_set_val][freq][val]) +"> /sys/devices/system/cpu/cpu"+ str(sets[freq_set_val][1]) + "/cpufreq/scaling_setspeed"                                 print "do something"         if freq_set_val == 1:                 freq in range(0, len(freq_set[freq_set_val])):                         change = "echo "+ str(freq_set[freq_set_val][freq][0]) +"> /sys/devices/system/cpu/cpu"+ str(sets[freq_set_val][0]) + "/cpufreq/scaling_setspeed"                         change = "echo "+ str(freq_set[freq_set_val][freq][0]) +"> /sys/devices/system/cpu/cpu"+ str(sets[freq_set_val][1]) + "/cpufreq/scaling_setspeed"                         change = "echo "+ str(freq_set[freq_set_val][freq][1]) +"> /sys/devices/system/cpu/cpu"+ str(sets[freq_set_val][2]) + "/cpufreq/scaling_setspeed"                         change = "echo "+ str(freq_set[freq_set_val][freq][1]) +"> /sys/devices/system/cpu/cpu"+ str(sets[freq_set_val][3]) + "/cpufreq/scaling_setspeed"                         print "do something"          if freq_set_val == 2:                 freq in range(0, len(freq_set[freq_set_val])):                         change = "echo "+ str(freq_set[freq_set_val][freq][0]) +"> /sys/devices/system/cpu/cpu"+ str(sets[freq_set_val][0]) + "/cpufreq/scaling_setspeed"                         change = "echo "+ str(freq_set[freq_set_val][freq][0]) +"> /sys/devices/system/cpu/cpu"+ str(sets[freq_set_val][1]) + "/cpufreq/scaling_setspeed"                         change = "echo "+ str(freq_set[freq_set_val][freq][1]) +"> /sys/devices/system/cpu/cpu"+ str(sets[freq_set_val][2]) + "/cpufreq/scaling_setspeed"                         change = "echo "+ str(freq_set[freq_set_val][freq][1]) +"> /sys/devices/system/cpu/cpu"+ str(sets[freq_set_val][3]) + "/cpufreq/scaling_setspeed"                         change = "echo "+ str(freq_set[freq_set_val][freq][2]) +"> /sys/devices/system/cpu/cpu"+ str(sets[freq_set_val][4]) + "/cpufreq/scaling_setspeed"                         change = "echo "+ str(freq_set[freq_set_val][freq][2]) +"> /sys/devices/system/cpu/cpu"+ str(sets[freq_set_val][5]) + "/cpufreq/scaling_setspeed"                         print "do something"          if freq_set_val == 3:                 freq in range(0, len(freq_set[freq_set_val])):                         change = "echo "+ str(freq_set[freq_set_val][freq][0]) +"> /sys/devices/system/cpu/cpu"+ str(sets[freq_set_val][0]) + "/cpufreq/scaling_setspeed"                         change = "echo "+ str(freq_set[freq_set_val][freq][0]) +"> /sys/devices/system/cpu/cpu"+ str(sets[freq_set_val][1]) + "/cpufreq/scaling_setspeed"                         change = "echo "+ str(freq_set[freq_set_val][freq][1]) +"> /sys/devices/system/cpu/cpu"+ str(sets[freq_set_val][2]) + "/cpufreq/scaling_setspeed"                         change = "echo "+ str(freq_set[freq_set_val][freq][1]) +"> /sys/devices/system/cpu/cpu"+ str(sets[freq_set_val][3]) + "/cpufreq/scaling_setspeed"                         change = "echo "+ str(freq_set[freq_set_val][freq][2]) +"> /sys/devices/system/cpu/cpu"+ str(sets[freq_set_val][4]) + "/cpufreq/scaling_setspeed"                         change = "echo "+ str(freq_set[freq_set_val][freq][2]) +"> /sys/devices/system/cpu/cpu"+ str(sets[freq_set_val][5]) + "/cpufreq/scaling_setspeed"                         change = "echo "+ str(freq_set[freq_set_val][freq][3]) +"> /sys/devices/system/cpu/cpu"+ str(sets[freq_set_val][6]) + "/cpufreq/scaling_setspeed"                         change = "echo "+ str(freq_set[freq_set_val][freq][3]) +"> /sys/devices/system/cpu/cpu"+ str(sets[freq_set_val][7]) + "/cpufreq/scaling_setspeed"                         print "do something"

is looking for?

def change_freq(freq_set, freq_set_val, freq, i1, i2):     change = "echo "+ str(freq_set[freq_set_val][freq][i1]) +"> /sys/devices/system/cpu/cpu"+ str(sets[freq_set_val][i2]) + "/cpufreq/scaling_setspeed"     # os.system(change)  freq_set_val in range(0, len(freq_set)):     freq in range(0, len(freq_set[freq_set_val])):                in range(0, (freq_set_val+1)*2):              change_freq(freq_set, freq_set_val, freq, i/2, i)          if freq_set_val == 0:             print "dosomething"         if freq_set_val == 1:             print "dosomething"         if freq_set_val == 2:             print "dosomething"         if freq_set_val == 3:             print "dosomething"

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