擅长:python、mysql、java
<p>你需要把你的代码改成这个</p>
<pre><code>populationFile = open("population.txt", 'r')
temp = None
# create an empty list
populationList = []
for line in populationFile:
# split into different words by the space ' ' character
temp = line.split() # temp = ['Canada', '37000000'] or ['China', '13860000000']
# if spaces exist on either the right or left of any the elements in the temp list
# remove them
temp = [item.strip() for item in temp[:]]
# append temp to the population list
populationList.append(temp)
print(populationList)
populationFile.close()
</code></pre>