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# -*- coding:utf-8 -*-

def count_pm(*args):

alist = list([round(i*2-8,2) for i in args]) #计算三种颗粒浓度

result = []

for pm in alist:

pm_abs = abs(pm)

result.append(generate_iso_code(pm_abs))

print (result)

return result

def generate_iso_code(x):

pm_value = [0.01,0.02,0.04,0.08,0.16,0.32,0.64,1.3,2.5,5,10,20,40,80] #颗粒浓度

iso = list(range(1,25)) #iso级别，共24级

for i in range(len(pm_value)): #for循环得到某个浓度范围的iso4006级别

if pm_value[i] < x <= pm_value[i+1]:

iso_code = iso[i]

break

return iso_code

if __name__ == '__main__':

count_pm(7.95,5.85,3.98)

count_pm(7.918,5.949,5.456)

count_pm(6.916,3.956,3.956)