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for n in range(2, 10):
    for x in range(2, n):
        if n % x == 0:
            print(f"{n} equals {x} * {n//x}")
            break
    else:
        print(f"{n} is a prime number")

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passÓï¾äÊÇPythonÖÐ×î¼òµ¥µÄÓï¾ä£¬Ëüʲô¶¼²»×ö¡£µ«ÔÚʵ¼Ê¿ª·¢ÖУ¬pass°çÑÝ×ÅÖØÒªµÄ½ÇÉ«¡£Ëü¿ÉÒÔÓÃ×÷º¯Êý¡¢Àà»òÌõ¼þÓï¾äµÄռλ·û£¬ÔÊÐí¿ª·¢ÕßÔÚ˼¿¼¸ß²ã´Î½á¹¹Ê±ÔÝÊ±Ìø¹ý¾ßÌåʵÏÖ¡£

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Python 3.10ÒýÈëµÄmatchÓï¾äÊǽüÄêÀ´×îÖØÒªµÄÓïÑÔÌØÐÔÖ®Ò»¡£ËüÌṩÁËÇ¿´óµÄģʽƥÅäÄÜÁ¦£¬Ô¶Ô¶³¬Ô½ÁË´«Í³switch-caseÓï¾äµÄ¹¦ÄÜ¡£

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def http_error(status):
    match status:
        case 400:
            return "Bad request"
        case 404:
            return "Not found"
        case 418:
            return "I'm a teapot"
        case _:
            return "Something's wrong with the internet"

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match point:
    case (0, 0):
        print("Origin")
    case (0, y):
        print(f"Y={y}")
    case (x, 0):
        print(f"X={x}")
    case (x, y):
        print(f"X={x}, Y={y}")
    case _:
        raise ValueError("Not a point")

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case 401 | 403 | 404:
    return "Not allowed"

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class Point:
    def __init__(self, x, y):
        self.x = x
        self.y = y

def where_is(point):
    match point:
        case Point(x=0, y=0):
            print("Origin")
        case Point(x=0, y=y):
            print(f"Y={y}")
        case Point(x=x, y=0):
            print(f"X={x}")
        case Point():
            print("Somewhere else")
        case _:
            print("Not a point")

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data = get_data()
if data:
    process(data)

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if data := get_data():
    process(data)

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while (chunk := file.read(1024)) != b'':
    process(chunk)

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squares = [x**2 for x in range(10)]

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squares_gen = (x**2 for x in range(10))

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with open('file.txt', 'r') as f:
    content = f.read()

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def my_decorator(func):
    def wrapper():
        print("Something is happening before the function is called.")
        func()
        print("Something is happening after the function is called.")
    return wrapper

@my_decorator
def say_hello():
    print("Hello!")

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async def fetch_data(url):
    async with aiohttp.ClientSession() as session:
        async with session.get(url) as response:
            return await response.text()

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try:
    result = risky_operation()
except ValueError as e:
    print(f"Value error: {e}")
except TypeError:
    print("Type error occurred")
else:
    print("Operation succeeded")
finally:
    cleanup_resources()

else×Ó¾äÔÚtry¿éûÓÐÒý·¢Ò쳣ʱִÐУ¬¶øfinally×Ó¾äÎÞÂÛÊÇ·ñ·¢ÉúÒì³£¶¼»áÖ´ÐУ¬ÊʺϽøÐÐ×ÊÔ´ÇåÀí¡£

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value = x if condition else y

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class Countdown:
    def __init__(self, start):
        self.current = start

    def __iter__(self):
        return self

    def __next__(self):
        if self.current <= 0:
            raise StopIteration
        else:
            self.current -= 1
            return self.current + 1

for number in Countdown(5):
    print(number)

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def fibonacci(limit):
    a, b = 0, 1
    while a < limit:
        yield a
        a, b = b, a + b

for num in fibonacci(1000):
    print(num)

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