Queue System Simulation

queue_system.py

import random

a_mean = 10.0
a_sd = 1.5
s_mean = 9.5
s_sd = 1.0
lim = 15
NR1 = [0] * lim
NR2 = [0] * lim
IAT = [0] * lim
ST = [0] * lim
SB = [0] * lim
SE = [0] * lim
WT = [0] * lim
IT = [0] * lim


def getCommulatives(nums):
    comm = [0] * len(nums)
    com_prob = 0.0
    for idx, num in enumerate(nums):
        com_prob += num
        comm[idx] = round(com_prob, 3)
    return comm


for i in range(0, lim):
    num1 = random.random() * random.randint(-1, 3)
    NR1[i] = round(num1, 2)
    IAT[i] = round(a_mean + a_sd * num1, 3)

    num2 = random.random() * random.randint(-1, 3)
    NR2[i] = round(num2, 2)
    ST[i] = round(s_mean + s_sd * num2, 2)

CAT = getCommulatives(IAT)

for idx, cat in enumerate(CAT):
    SB[idx] = max(cat, SE[idx - 1] or 0)
    SE[idx] = round(SB[idx] + ST[idx], 3)
    wt = (SE[idx-1] or 0) - cat
    WT[idx] = round(wt, 3) if wt > 0 else 0
    it = cat - (SE[idx-1] or 0)
    IT[idx] = round(it, 3) if it > 0 else 0


print('i'.rjust(4) + 'r\''.rjust(8) + 'IAT'.rjust(10) + 'CAT'.rjust(10) 
    + 'r"'.rjust(10) + 'ST'.rjust(10) + 'SB'.rjust(10) + 'SE'.rjust(10)  
    + 'WT'.rjust(10) + 'IT'.rjust(10))
print('-' * 92)
for i in range(0, lim):
    print(str(i+1).rjust(4) + str(NR1[i]).rjust(8) + str(IAT[i]).rjust(10) 
        + str(CAT[i]).rjust(10) + str(NR2[i]).rjust(10) + str(ST[i]).rjust(10) 
        + str(SB[i]).rjust(10) + str(SE[i]).rjust(10) + str(WT[i]).rjust(10) 
        + str(IT[i]).rjust(10))