怎么提取字符串中的数字

Question

   '西瓜有5个，杏有20个，梨有4个，香蕉有3个，猕猴桃有6个，桃子有21个，火龙果有7个'                

怎么将其中的数字提取并求和。求大佬指点

Answer 1

#!/usr/bin/python
# -*- coding: UTF-8 -*-
"""
@author: Roc-xb
"""
import re

s = '西瓜有5个，杏有20个，梨有4个，香蕉有3个，猕猴桃有6个，桃子有21个，火龙果有7个'
sum = 0
res = re.findall("\d+", s)
for i in res:
    sum += int(i)
print(res)
print("sum=", sum)