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這篇文章主要講解了“一行Python代碼能干哪些事”,文中的講解內容簡單清晰,易于學習與理解,下面請大家跟著小編的思路慢慢深入,一起來研究和學習“一行Python代碼能干哪些事”吧!
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。
(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))))
感謝各位的閱讀,以上就是“一行Python代碼能干哪些事”的內容了,經過本文的學習后,相信大家對一行Python代碼能干哪些事這一問題有了更深刻的體會,具體使用情況還需要大家實踐驗證。這里是億速云,小編將為大家推送更多相關知識點的文章,歡迎關注!
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