Question

我正在尝试将一个txt文件添加到Python中的列表中，然后遍历列表查找数字并将它们全部添加到一起。

示例文字：

Alabama 4780
Alaska 710
Arizona 6392
Arkansas 2916
California 37254
Colorado 5029

预期产出：

['Alabama', '4780', 'Alaska', '710', 'Arizona', '6392', 'Arkansas', '2916', 'California', '37254', 'Colorado', '5029']

total population: 57621

我可以将它们添加到列表中，但无法找到所有数字的总和。理想情况下，我希望将其全部集中在一个功能中。

def totalpoplst(filename):
    lst = []
    with open(filename) as f:
        for line in f:
            lst += line.strip().split(' ')
        return print(lst)
    totalpop()

def totalpop(filename):
    total_pop = 0
    for i in lst:
        if  i.isdigit():
            total_pop = total_pop + i.isdigit()
    return print(total_pop)

def main():
    filename = input("Please enter the file's name: ")
    totalpoplst(filename)

main()

Answer 1

您需要将作为字符串提供的填充转换为数字。要执行此操作，请更改以下行：

total_pop = total_pop + i.isdigit()

阅读：

total_pop = total_pop + int(i)

Answer 2

最好将dict用于键值数据结构，而不是列表。

>>> population = {}
>>> total = 0
>>> with open('list.txt', 'r') as handle:
...     for line in handle:
...         state, sep, pop = line.partition(' ')
...         population[state] = int(pop)
...         total += population[state]
... 
>>> total
57081

Answer 3

f = open('your_file.txt')  
your_dict={}
total_pop = 0
for x in f:
    x=x.strip()
    s,p=x.split(' ')
    your_dict[s]=p
    total_pop +=int(p)
print your_dict
print total_pop

要使用的词典会更好

迭代列表以添加值

3 个答案: