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 ÕýÔÚÔĶÁ×îаæµÄ¡¶A byte of Python¡·¡£·¢ÏÖPython3.0ÔÚijЩµØ·½»¹ÊÇÓÐЩ¸Ä±äµÄ¡£×¼±¸ÂýÂýµÄÌå»á£¬ÓëÀϰ汾µÄ¡¶A byte of Python¡·×ö¶Ô±È£¬×îºóÔÙÈ¥²éÔĹٷ½ÍøÕ¾µÄÎĵµ¡£
1.
Èç¹ûÄãÏÂÔØµÄÊÇ×îаæµÄPython£¬¾Í»á·¢ÏÖËùÓÐÊéÖеÄHello WorldÀý×Ó½«²»ÔÙÕýÈ·¡£
Old:
print "Hello World!" #´òÓ¡×Ö·û´®
New:
print("Hello World!")
½«×Ö·û´®·Åµ½À¨ºÅÖÐprint³öÀ´£¬ÕâÖÖд·¨¶ÔÓÚÎÒÕâÖÖѧϰJava³öÉíµÄÈËÀ´Ëµ£¬ºÜÊÇÇ×Çа¡£º£©
2.
Old:
guess = int(raw_input('Enter an integer : ')) #¶ÁÈ¡¼üÅÌÊäÈëµÄ·½·¨
New:
guess = int(input('Enter an integer : '))
·½·¨Ãû±äµÃ¸ü¼ÓÈÝÒ׼ǣ¡
3.
¼ÓÈëÁËÒ»¸öеÄnonlocal statement£¬·Ç¾Ö²¿±äÁ¿£¬ËüµÄ·¶Î§½éÓÚglobalºÍlocalÖ®¼ä£¬Ö÷ÒªÓÃÓÚº¯ÊýǶÌ×£¬Ó÷¨ÈçÏ£º
#!/usr/bin/python
# Filename: func_nonlocal.py
def func_outer():
    x = 2
    print('x is', x)
    def func_inner():
        nonlocal x
        x = 5
    func_inner()
    print('Changed local x to', x)
func_outer()
4.
VarArgs parameters£¬²»ÖªµÀÕâ¸ö·­Òë³Éʲô±È½ÏÍ×µ±£¿ÏÈ¿´Àý×Ó£º
#!/usr/bin/python
# Filename: total.py
def total(initial=5, *numbers, **keywords):
    count = initial
    for number in numbers:
        count += number
    for key in keywords:
        count += keywords[key]
    return count
print(total(10, 1, 2, 3, vegetables=50, fruits=100))
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µ±ÔÚ²ÎÊýÇ°ÃæÊ¹ÓÃ**±êʶµÄʱºò£¬ËùÓеĹؼü²ÎÊý£¨vegetables=50, fruits=100£©×÷Ϊһ¸ödictionary´«µÝ¡£
5.
¹ØÓÚPackagesµÄ»°Ì⣬ÎÒû¿´¶®¡£¡£¡£ÄÄλ´óϺ°ïæ½²½âÏ£¿
6.
ÔÚÊý¾Ý½á¹¹ÖУ¬¶àÁËÒ»ÖÖÀàÐÍ:set
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