generator.py

#!/usr/bin/env python

from functools import partial

def main():
    """
    Main function
    """
    A = list(range(10))

    n = 3
    foo = lambda x, y: x**2 + y
    bar = partial(foo, 1)

    for x in [A[n]] + [y for i, y in enumerate(A) if i != n]:
        print(x)
    print('---')
    for x in sorted(A, key=lambda y: y != n):
        print(x)
    print('---')


    
    for x in (A[(n+i) % len(A)] for i in range(len(A))):
        print(x)
    print('---')
    for i, x in enumerate(A):
        print(i, x)
    for i, x in zip(range(len(A)), A):
        print(i, x)
if __name__ == '__main__':
    main()