Question

我要做的是选择一个像“['史密斯'，'13'，'19'，'8'，'12']这样的清单，而我正试图把它从中取出来将它们全部加起来计算平均值。任何人都知道如何做到这一点？

Answer 1

您可以执行以下操作：

# go through each member of your list and call the 
# builtin string method `isdigit` check out the documentation
digits = [int(s) for s in your_list if s.isdigit()]
# use the built in `sum` function and the builtin `len` function
sum(digits) / len(digits)

Answer 2

使用try。

sum = 0
number_of_ints = 0
for items in ['Smith', '13', '19', '8', '12']:
    try:
        sum += int(items)
        number_of_ints+=1
    except:
        pass
print sum/number_of_ints

基本上，这会将其添加到sum。如果失败，它会继续。

Answer 3

试试这个：

myList = ['Smith', '13', '19', '8', '12']
count = 0
total = 0

for i in myList:
    if i.isdigit():
        count += 1
        total += int(i)

average = total / count

解析包含Str和Ints的列表

3 个答案: