How to write the Fibonacci Sequence in Python

fibonacci.py

# a two ways: classic and with recoursive function


def fibonacci():
    '''classic implementation'''
    a, b = 0, 1
    while True:
        yield a
        a, b = b, a + b


def rfib(n):
   '''Recursive function to
   print Fibonacci sequence'''
   if n <= 1:
       return n
   else:
       return(rfib(n-1) + rfib(n-2))


if __name__ == "__main__":
    for i in range(10):     # get first 10 of fibonacci sequence
        print(rfib(i), end=',')
    
    print()
    j=10       
    for i in fibonacci():
        if j==0:
            break
        print(i, end=',')
        j-=1
    print()

# result: 
# 0,1,1,2,3,5,8,13,21,34,
# 0,1,1,2,3,5,8,13,21,34,