Fibonacci Sequence: Getting integer input and prints nth fibonacci number as an output

fibonacci.py

#Fibonacci Sequence Study
#This program will find out 2 things: 
#1)Whether the given number is in fibonacci sequence, 
#2)If it is in the Fibonacci sequence, then shows the nth

n = int(input('Please enter an integer:'))
def fibo(n):

    if n in [1,2]:
        return 1
    elif n ==0:
        return 0
    else:
        return fibo(n-1) + fibo(n-2)


print(fibo(n))