<\/span><\/h2>\n\n\n\n\u5217\u8868\u63a8\u5bfc\u5f0f\u662fPython\u91cc\u7684\u4e00\u80a1\u6e05\u6d41\uff0c\u5b83\u4ee5\u4e00\u79cd\u63a5\u8fd1\u81ea\u7136\u8bed\u8a00\u7684\u65b9\u5f0f\uff0c\u5c06\u5faa\u73af\u548c\u6761\u4ef6\u5224\u65ad\u878d\u4e3a\u4e00\u4f53\u3002\u60f3\u8c61\u4f60\u8981\u4ece\u4e00\u4e2a\u6570\u5b57\u5217\u8868\u4e2d\u9009\u51fa\u6240\u6709\u5076\u6570\uff0c\u4f20\u7edf\u65b9\u5f0f\u53ef\u80fd\u9700\u8981\u5faa\u73af\u52a0\u6761\u4ef6\uff0c\u4f46Python\u8bf4\uff1a\u201c\u4e0d\uff0c\u8ba9\u6211\u6765\u7b80\u5316\u8fd9\u4e00\u5207\u3002\u201d\ud83d\udc47<\/p>\n\n\n\n
numbers = [1, 2, 3, 4, 5, 6]
even_numbers = [num for num in numbers if num % 2 == 0]<\/code><\/pre>\n\n\n\n\u8fd9\u884c\u4ee3\u7801\u7684\u610f\u601d\u662f\uff1a\u201c\u5bf9\u4e8enumbers<\/code>\u4e2d\u7684\u6bcf\u4e2anum<\/code>\uff0c\u5982\u679c\u5b83\u662f\u5076\u6570\uff08\u5373num % 2 == 0<\/code>\uff09\uff0c\u5c31\u628a\u5b83\u52a0\u5230\u65b0\u7684\u5217\u8868\u91cc\u3002\u201d\u7b80\u5355\u3001\u76f4\u63a5\uff0c\u4e00\u884c\u4ee3\u7801\u641e\u5b9a\uff01<\/p>\n\n\n\n<\/span>2. \u751f\u6210\u5668\u8868\u8fbe\u5f0f\uff1a\u5185\u5b58\u53cb\u597d\u5927\u4f7f<\/strong><\/span><\/h2>\n\n\n\n\u5f53\u5904\u7406\u5927\u6570\u636e\u65f6\uff0c\u4e00\u6b21\u6027\u52a0\u8f7d\u6240\u6709\u6570\u636e\u53ef\u80fd\u4f1a\u8ba9\u4f60\u7684\u7a0b\u5e8f\u5598\u4e0d\u8fc7\u6c14\u6765\u3002\u8fd9\u65f6\uff0c\u751f\u6210\u5668\u8868\u8fbe\u5f0f\u767b\u573a\u4e86\uff0c\u5b83\u50cf\u4e00\u4e2a\u6309\u9700\u4f9b\u5e94\u7684\u5de5\u5382\uff0c\u53ea\u5728\u4f60\u9700\u8981\u65f6\u624d\u751f\u4ea7\u6570\u636e\u3002<\/p>\n\n\n\n
big_data = range(1, 1000001) # \u5047\u8bbe\u8fd9\u662f\u4e2a\u5927\u6570\u636e\u96c6<\/em>
memory_savvy = (num for num in big_data if num % 1000 == 0)<\/code><\/pre>\n\n\n\n\u8fd9\u91cc\uff0c\u6211\u4eec\u521b\u5efa\u4e86\u4e00\u4e2a\u751f\u6210\u5668\uff0c\u5b83\u4f1a\u61d2\u6d0b\u6d0b\u5730\u7b49\u5f85\uff0c\u76f4\u5230\u4f60\u8bf7\u6c42\u4e0b\u4e00\u4e2a\u6570\u5b57\uff08\u6bd4\u5982\u901a\u8fc7next(memory_savvy)<\/code>\uff09\u3002\u8fd9\u6837\uff0c\u5373\u4f7f\u6570\u636e\u518d\u591a\uff0c\u5185\u5b58\u4e5f\u5403\u5f97\u6d88\uff01<\/p>\n\n\n\n<\/span>3. enumerate\uff1a\u7f16\u53f7\u795e\u5668<\/strong><\/span><\/h2>\n\n\n\n\u904d\u5386\u7684\u540c\u65f6\u60f3\u8981\u77e5\u9053\u5143\u7d20\u7684\u7d22\u5f15\uff1fPython\u7684enumerate<\/code>\u51fd\u6570\u5c31\u50cf\u7ed9\u6bcf\u4e2a\u5143\u7d20\u8d34\u4e0a\u4e86\u6807\u7b7e\uff0c\u65e2\u5b9e\u7528\u53c8\u65b9\u4fbf\u3002<\/p>\n\n\n\nfruits = ['apple', 'banana', 'cherry']
for index, fruit in enumerate(fruits):
print(f\"\u6c34\u679c#{index}: {fruit}\")<\/code><\/pre>\n\n\n\n\u8fd9\u6bb5\u4ee3\u7801\u6267\u884c\u65f6\uff0c\u4f1a\u4f9d\u6b21\u6253\u5370\u51fa\uff1a\u201c\u6c34\u679c#0: apple\u201d\uff0c\u201c\u6c34\u679c#1: banana\u201d\uff0c\u201c\u6c34\u679c#2: cherry\u201d\u3002\u8fd9\u6837\uff0c\u904d\u5386\u548c\u7d22\u5f15\u67e5\u8be2\u4e00\u6b65\u5230\u4f4d\uff0c\u6548\u7387\u6ee1\u5206\uff01<\/p>\n\n\n\n
<\/span>4. zip\uff1a\u5e76\u884c\u6f2b\u6b65<\/strong><\/span><\/h2>\n\n\n\n\u5f53\u4f60\u6709\u591a\u4e2a\u5217\u8868\uff0c\u60f3\u8981\u540c\u65f6\u904d\u5386\u5b83\u4eec\u7684\u5bf9\u5e94\u5143\u7d20\u65f6\uff0czip<\/code>\u51fd\u6570\u5c31\u662f\u4f60\u7684\u6700\u4f73\u62cd\u6863\u3002\u5b83\u80fd\u8ba9\u4f60\u7684\u591a\u4e2a\u5217\u8868\u624b\u62c9\u624b\uff0c\u540c\u6b65\u524d\u8fdb\u3002<\/p>\n\n\n\nnames = [\"Alice\", \"Bob\", \"Charlie\"]
ages = [24, 30, 19]
for name, age in zip(names, ages):
print(f\"{name} is {age} years old.\")<\/code><\/pre>\n\n\n\n\u6267\u884c\u540e\uff0c\u4f60\u4f1a\u770b\u5230\uff1a\u201cAlice is 24 years old.\u201d\uff0c\u201cBob is 30 years old.\u201d\uff0c\u201cCharlie is 19 years old.\u201d\u3002\u8fd9\u79cd\u5e76\u884c\u5904\u7406\uff0c\u975e\u5e38\u9002\u5408\u5904\u7406\u4e00\u5bf9\u591a\u7684\u6570\u636e\u7ed3\u6784\u3002<\/p>\n\n\n\n
<\/span>5. itertools\uff1a\u9ad8\u7ea7\u904d\u5386\u5de5\u5177\u7bb1<\/strong><\/span><\/h2>\n\n\n\nPython\u7684itertools<\/code>\u6a21\u5757\u662f\u4e00\u5957\u975e\u5e38\u5f3a\u5927\u7684\u8fed\u4ee3\u5668\u5de5\u5382\uff0c\u5b83\u80fd\u8ba9\u4f60\u7684\u904d\u5386\u6280\u5de7\u4e0a\u5347\u5230\u4e00\u4e2a\u65b0\u7684\u5c42\u6b21\u3002\u6bd4\u5982\uff0ccycle<\/code>\u53ef\u4ee5\u65e0\u9650\u5faa\u73af\u4e00\u4e2a\u5e8f\u5217\uff0cproduct<\/code>\u80fd\u8ba1\u7b97\u7b1b\u5361\u5c14\u79ef\uff0c\u800cchain<\/code>\u5219\u53ef\u4ee5\u8fde\u63a5\u591a\u4e2a\u8fed\u4ee3\u5668\u3002<\/p>\n\n\n\n\u6765\u4e2a\u5c0f\u4f8b\u5b50\uff0c\u4f7f\u7528itertools.product<\/code>\u6765\u751f\u6210\u6240\u6709\u53ef\u80fd\u7684\u9ab0\u5b50\u7ec4\u5408\uff1a<\/p>\n\n\n\nfrom itertools import product
dice_faces = [1, 2, 3, 4, 5, 6]
rolls = list(product(dice_faces, repeat=2)) # \u63b7\u4e24\u6b21\u9ab0\u5b50\u7684\u6240\u6709\u7ec4\u5408<\/em>
print(rolls)<\/code><\/pre>\n\n\n\n\u8fd9\u6bb5\u4ee3\u7801\u4f1a\u5217\u51fa\u6240\u6709\u53ef\u80fd\u7684\u63b7\u9ab0\u5b50\u7ed3\u679c\uff0c\u6bd4\u5982(1, 1), (1, 2), ... (6, 5), (6, 6)<\/code>\uff0c\u975e\u5e38\u9002\u5408\u89e3\u51b3\u7ec4\u5408\u95ee\u9898\u3002<\/p>\n\n\n\n
\n\n\n\n\u5230\u8fd9\u91cc\uff0c\u6211\u4eec\u5df2\u7ecf\u89e3\u9501\u4e86\u7528Python\u8fdb\u884c\u9ad8\u6548\u904d\u5386\u7684\u4e94\u79cd\u9ad8\u7ea7\u6280\u5de7\u3002<\/p>\n\n\n\n
\n\n\n\n<\/span>\u8fdb\u9636\u6280\u5de7<\/strong><\/span><\/h2>\n\n\n\n<\/span>6. \u5217\u8868\u7684map()\u4e0efilter()\uff1a\u51fd\u6570\u5f0f\u7f16\u7a0b\u7684\u8f7b\u89e6<\/strong><\/span><\/h2>\n\n\n\n\u5728Python\u4e2d\uff0c\u867d\u7136for<\/code>\u5faa\u73af\u51e0\u4e4e\u65e0\u5904\u4e0d\u5728\uff0c\u4f46\u5229\u7528map()<\/code>\u548cfilter()<\/code>\u51fd\u6570\uff0c\u6211\u4eec\u53ef\u4ee5\u7528\u51fd\u6570\u5f0f\u7f16\u7a0b\u7684\u98ce\u683c\u6765\u5904\u7406\u6570\u636e\uff0c\u8fd9\u5728\u5904\u7406\u7279\u5b9a\u903b\u8f91\u65f6\u663e\u5f97\u683c\u5916\u4f18\u96c5\u3002<\/p>\n\n\n\nmap()<\/strong> – \u5e94\u7528\u51fd\u6570\u5230\u5e8f\u5217\u7684\u6bcf\u4e2a\u5143\u7d20\uff1a<\/p>\n\n\n\nnumbers = [1, 2, 3, 4]
squared = map(lambda x: x**2, numbers)
print(list(squared)) # \u8f93\u51fa\uff1a[1, 4, 9, 16]<\/em><\/code><\/pre>\n\n\n\n\u8fd9\u91cc\uff0clambda x: x**2<\/code>\u662f\u4e00\u4e2a\u533f\u540d\u51fd\u6570\uff0c\u5bf9\u6bcf\u4e2a\u6570\u5b57\u8fdb\u884c\u5e73\u65b9\u8fd0\u7b97\uff0cmap()<\/code>\u5e94\u7528\u8fd9\u4e2a\u51fd\u6570\u5230numbers<\/code>\u7684\u6bcf\u4e2a\u5143\u7d20\u4e0a\u3002<\/p>\n\n\n\nfilter()<\/strong> – \u6839\u636e\u6761\u4ef6\u7b5b\u9009\u5e8f\u5217\uff1a<\/p>\n\n\n\neven_numbers = filter(lambda x: x % 2 == 0, numbers)
print(list(even_numbers)) # \u8f93\u51fa\uff1a[2, 4]<\/em><\/code><\/pre>\n\n\n\n\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cfilter()<\/code>\u6839\u636e\u6761\u4ef6\uff08\u662f\u5426\u4e3a\u5076\u6570\uff09\u7b5b\u9009\u51fanumbers<\/code>\u4e2d\u7684\u5143\u7d20\u3002<\/p>\n\n\n\n