python - 检查列表中的每种数据类型并对列表中的任何数字求和并打印它们

Question

我正在尝试检查列表中的每种数据类型，如果该列表混合了多种数据类型，则打印出该列表是混合数据类型并对列表中的所有数字求和。它应该适用于任何列表。有任何想法吗？这是我目前所拥有的。

a = ["cats",4,"n",2,"the",3,"house"]
total = 0
for i in a:
   if isinstance(i , int) and isinstance(i, str):
     total = total + i
     print "This list has a mix of data types"
     print total
   else:

Answer 1

a = ["cats",4,"n",2,"the",3,"house"]
if len(set([type(i) for i in a])) > 1:
    print("Mixed types")
total = sum([i for i in a if type(i)==int or type(i)==float])
print(total)

这导致:

Mixed types
9