dict变量后的方括号是什么意思

Question

I just wanted to know what does the square bracket mean in check[] and what does this square bracket do, because all I know that {} are dictionaries and [] are lists.

n = int(input().strip())
check = {True: "Not Weird", False: "Weird"}

print(check[
    n%2==0 and (
        n in range(2,6) or 
        n > 20)
])

Answer 1

check is a dictionary and check[k] looks up the key k in this dictionary and returns the associated value.

This is a "clever" way of writing:

n = int(input().strip())

if n%2==0 and (n in range(2,6) or n > 20):
    print("Not Weird")
else:
    print("Weird")