確認環境
$ python --version
Python 3.6.2 :: Anaconda custom (64-bit)調査
test.py
n = input().split()
print(n)
print(type(n))
print("---")
a = "a b c"
b = a.split()
print(b)
print(type(b))出力結果
$ python test.py
1 2 3
['1', '2', '3']
<class 'list'>
---
['a', 'b', 'c']
<class 'list'>