8 lines of code forecast Chinese population

Now the question about China's population growth is hot, so we might as well predict, and by the way, learn practiced hand python.

Let us first look at the results of the 2010 census, which is as follows: http://www.docin.com/p-710316652.html

The age structure of the population in 2010 is as follows:

0-4 years: 69 million

5-9 years: 70 million

10-14 years: 83 million

15-19 years: 110 million

20-24 years: 125 million

25-29 years: 110 million

30-34 years: 94 million

35-39 years: 126 million

40-44 years: 116 million

45-49 years: 81 million

50-54 years: 80 million

55-59 years: 82 million

60-64 years: 78 million

65-69 years: 65 million

70-74 years: 44 million

Over 75 yrs: 10 million

To calculate population growth, let's simplify this model:

We assume that we all have children at the age of 25-29, with an average couple having 1.5 offspring, that is, 0.75 children per person. The code is as follows:

people=[ 6900.0,9100.0,10790.0,1430.0,12220.0,16380.0,15080.0,10530.0,10400.0,10660.0,10140.0,8450.0,5720.0,1300.0] I=2010 while sum (people) >1:    i=i+5 for in     [ 13,12,11,10,9,8,7,6,5,4,3,2,1]:        people[x]=people[x-1]        people[0]=people[6]/2*0.75    Print i,":", sum (people)

The results are as follows:

2015:133,185
2020:130487.5
2025:118527.5
2030:115943.75
2035:108062.5
2040:98856.875
2045:89460.3125
2050:73064.0625
2,055:59517.65625
2,060:48339.6875
2,065:47357.578125
2,070:36992.6171875
2,075:27399.0234375
2,080:22319.1210938
2,085:18127.3828125
2,090:17759.0917969
2,095:13872.2314453
2,100:10274.6337891
2,105:8369.67041016
2,110:6797.76855469
2,115:6659.65942383
2,120:5202.08679199
2,125:3852.9876709
2,130:3138.62640381
2,135:2549.16320801
2,140:2497.37228394
2,145:1950.782547
2,150:1444.87037659
2,155:1176.98490143
2,160:955.936203003
2,165:936.514606476
2,170:731.543455124
2,175:541.82639122
2,180:441.369338036
2,185:358.476076126
2,190:351.192977428
2,195:274.328795671
2,200:203.184896708
2,205:165.513501763
2,210:134.428528547
2,215:131.697366536
2,220:102.873298377
2,225:76.1943362653
2,230:62.0675631613
2,235:50.4106982052
2,240:49.3865124509
2,245:38.5774868913
2,250:28.5728760995
2,255:23.2753361855
2,260:18.904011827
2,265:18.5199421691
2,270:14.4665575842
2,275:10.7148285373
2,280:8.72825106955
2,285:7.08900443511
2,290:6.9449783134
2,295:5.42495909409
2,300:4.01806070149
2,305:3.27309415108
2,310:2.65837666317
2,315:2.60436686753
2,320:2.03435966028
2,325:1.50677276306
2,330:1.22741030666
2,335:0.996891248687

8 lines of code forecast Chinese population