擅长:python、mysql、java
<pre><code>dataList = []
read = open("USPopulation.txt", 'r')
population = read.readline().rstrip('\n')
year = 1950
i = 0
while population != "":
year += i
#An empty list needs to be append to add items
#fix begin
dataList.append([])
#fix end
dataList[i].append(year)
dataList[i].append(population)
i += 1
population = read.readline().rstrip('\n')
</code></pre>