首先你要了解一下Python之禪，一行代碼輸出“The Zen of Python”：

python -c "import this"

"""

The Zen of Python, by Tim Peters

Beautiful is better than ugly.

Explicit is better than implicit.

Simple is better than complex.

Complex is better than complicated.

Flat is better than nested.

Sparse is better than dense.

Readability counts.

Special cases aren't special enough to break the rules.

Although practicality beats purity.

Errors should never pass silently.

Unless explicitly silenced.

In the face of ambiguity, refuse the temptation to guess.

There should be one-- and preferably only one --obvious way to do it.

Although that way may not be obvious at first unless you're Dutch.

Now is better than never.

Although never is often better than *right* now.

If the implementation is hard to explain, it's a bad idea.

If the implementation is easy to explain, it may be a good idea.

Namespaces are one honking great idea -- let's do more of those!

"""

從“The Zen of Python”也能看出，Python倡導Beautiful、Explicit、Simple等原則，當然我們接下來要介紹的一行Python能實現哪些好玩的功能，可能和Explicit原則相違背。

如果你有其他這方面的小例子，也歡迎評論，我會加到文章中，文章也許會長期更新。

(1)一行代碼啟動一個Web服務

python -m SimpleHTTPServer 8080 # python2

python3 -m http.server 8080 # python3

(2)一行代碼實現變量值互換

a, b = 1, 2; a, b = b, a

(3)一行代碼解決FizzBuzz問題:

FizzBuzz問題：打印數字1到100, 3的倍數打印“Fizz”, 5的倍數打印“Buzz”, 既是3又是5的倍數的打印“FizzBuzz”

for x in range(1, 101): print("fizz"[x % 3 * 4:]+"buzz"[x % 5 * 4:] or x)

(4)一行代碼輸出特定字符”Love”拼成的心形

print('\n'.join([''.join([('Love'[(x-y) % len('Love')] if ((x*0.05)**2+(y*0.1)**2-1)**3-(x*0.05)**2*(y*0.1)**3 <= 0 else ' ') for x in range(-30, 30)]) for y in range(30, -30, -1)]))

(5)一行代碼輸出Mandelbrot圖像

Mandelbrot圖像：圖像中的每個位置都對應于公式N=x+y*i中的一個復數

print('\n'.join([''.join(['*'if abs((lambda a: lambda z, c, n: a(a, z, c, n))(lambda s, z, c, n: z if n == 0 else s(s, z*z+c, c, n-1))(0, 0.02*x+0.05j*y, 40)) < 2 else ' ' for x in range(-80, 20)]) for y in range(-20, 20)]))

(6)一行代碼打印九九乘法表

print('\n'.join([' '.join(['%s*%s=%-2s' % (y, x, x*y) for y in range(1, x+1)]) for x in range(1, 10)]))

(7)一行代碼計算出1-100之間的素數(兩個版本)

print(' '.join([str(item) for item in filter(lambda x: not [x % i for i in range(2, x) if x % i == 0], range(2, 101))]))

print(' '.join([str(item) for item in filter(lambda x: all(map(lambda p: x % p != 0, range(2, x))), range(2, 101))]))

(8)一行代碼輸出斐波那契數列

print([x[0] for x in [(a[i][0], a.append([a[i][1], a[i][0]+a[i][1]])) for a in ([[1, 1]], ) for i in range(30)]])

(9)一行代碼實現快排算法

qsort = lambda arr: len(arr) > 1 and qsort(list(filter(lambda x: x <= arr[0], arr[1:]))) + arr[0:1] + qsort(list(filter(lambda x: x > arr[0], arr[1:]))) or arr

(10)一行代碼解決八皇后問題

[__import__('sys').stdout.write('\n'.join('.' * i + 'Q' + '.' * (8-i-1) for i in vec) + "\n========\n") for vec in __import__('itertools').permutations(range(8)) if 8 == len(set(vec[i]+i for i in range(8))) == len(set(vec[i]-i for i in range(8)))]

(11)一行代碼實現數組的flatten功能: 將多維數組轉化為一維

flatten = lambda x: [y for l in x for y in flatten(l)] if isinstance(x, list) else [x]

(12)一行代碼實現list, 有點類似與上個功能的反功能

array = lambda x: [x[i:i+3] for i in range(0, len(x), 3)]

(13)一行代碼實現求解2的1000次方的各位數之和

print(sum(map(int, str(2**1000))))

總結

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