Python 如何在包含数字和字符串的列表中添加数字

假设我有一个如下列表：

ExampleList = [2,4,7,4,2,"randomword",23,42,2,1,4,-53,"newrandomword",32,5,2,3]

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我如何只添加数字

您可以使用以下生成器表达式，它将在列表中添加所有

int

：

l = [2,4,7,4,2,"randomword",23,42,2,1,4,-53,"newrandomword",32,5,2,3]

sum(i for i in l if isinstance(i,int))
# 80

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您还可以使用函数

filter（）

：

---

这将处理所有数字：）

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通过编程，您可以总结如下：

l = [2,4,7,4,2,"randomword",23,42,2,1,4,-53,"newrandomword",32,5,2,3]
s=0
for i in l:
    try:
        s+=int(i)
    except ValueError:
        print('not a rumber')

print('sum of number is:',s)  

>>> import numbers
>>> x
[2, 4, 7, 4, 2, 'randomword', 23, 42, 2, 1, 4, -53, 'newrandomword', 32, 5, 2, 3, 1.02]
>>> sum(y for y in x if isinstance(y, numbers.Number))
81.02

l = [2,4,7,4,2,"randomword",23,42,2,1,4,-53,"newrandomword",32,5,2,3]
s=0
for i in l:
    try:
        s+=int(i)
    except ValueError:
        print('not a rumber')

print('sum of number is:',s)