else.py

# coding=UTF-8

# for...else...
def printPrime1(n):
    for i in xrange(2, n):
        found = False
        for j in xrange(2, i):
            if i % j == 0:
                found = True
                break
        if not found:
            print(i)

def printPrime2(n):
    for i in xrange(2, n):
        for j in xrange(2, i):
            if i % j == 0:
                break
        else:
            print(i)

# while...else...

# try...else...
def save1(db):
    error_occured = False
    try:
        db.execute('...')
    except DBError:
        error_occured = True
        db.roolback()
    if not error_occured:
        db.commit()

def saver2(db):
    try:
        db.execute('...')
    except DBError:
        db.roolback()
    else:
        db.commit()