{"id":1177976,"date":"2025-01-15T18:04:43","date_gmt":"2025-01-15T10:04:43","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1177976.html"},"modified":"2025-01-15T18:04:46","modified_gmt":"2025-01-15T10:04:46","slug":"python%e5%a6%82%e4%bd%95%e5%86%99%e5%88%97%e8%a1%a8%e8%bf%ad%e4%bb%a3","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1177976.html","title":{"rendered":"python\u5982\u4f55\u5199\u5217\u8868\u8fed\u4ee3"},"content":{"rendered":"

\"python\u5982\u4f55\u5199\u5217\u8868\u8fed\u4ee3\"<\/p>\n

Python\u5199\u5217\u8868\u8fed\u4ee3\u6709\u591a\u79cd\u65b9\u6cd5\uff0c\u5305\u62ec\u4f7f\u7528for\u5faa\u73af\u3001\u5217\u8868\u63a8\u5bfc\u5f0f\u3001map\u51fd\u6570\u3001filter\u51fd\u6570\u7b49\u3002<\/strong>\u5728\u8fd9\u4e9b\u65b9\u6cd5\u4e2d\uff0c\u5217\u8868\u63a8\u5bfc\u5f0f\u662f\u6700\u7b80\u6d01\u548c\u9ad8\u6548\u7684\uff0cfor\u5faa\u73af\u5219\u662f\u6700\u901a\u7528\u548c\u6613\u8bfb\u7684\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u5177\u4f53\u793a\u4f8b\u6765\u8be6\u7ec6\u63cf\u8ff0\u5982\u4f55\u4f7f\u7528\u8fd9\u4e9b\u65b9\u6cd5\u8fdb\u884c\u5217\u8868\u8fed\u4ee3\u3002<\/p>\n<\/p>\n

\u4e00\u3001FOR\u5faa\u73af\u8fed\u4ee3\u5217\u8868<\/h3>\n<\/p>\n

\u4f7f\u7528for<\/code>\u5faa\u73af\u662fPython\u4e2d\u6700\u5e38\u89c1\u7684\u5217\u8868\u8fed\u4ee3\u65b9\u6cd5\u3002\u5b83\u7684\u4f18\u70b9\u662f\u76f4\u89c2\u3001\u6613\u8bfb\uff0c\u9002\u5408\u5904\u7406\u590d\u6742\u7684\u8fed\u4ee3\u903b\u8f91\u3002<\/p>\n<\/p>\n

\u57fa\u672c\u7528\u6cd5<\/h4>\n<\/p>\n

# \u521b\u5efa\u4e00\u4e2a\u7b80\u5355\u7684\u5217\u8868<\/p>\n
numbers = [1, 2, 3, 4, 5]<\/p>\n
\u4f7f\u7528for\u5faa\u73af\u8fed\u4ee3\u5217\u8868<\/strong><\/h2>\n
for number in numbers:<\/p>\n
    print(number)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u901a\u8fc7for<\/code>\u5faa\u73af\u9010\u4e00\u8bbf\u95ee\u5217\u8868\u4e2d\u7684\u6bcf\u4e00\u4e2a\u5143\u7d20\uff0c\u5e76\u5c06\u5176\u6253\u5370\u51fa\u6765\u3002\u8fd9\u4e2a\u65b9\u6cd5\u975e\u5e38\u76f4\u89c2\uff0c\u9002\u5408\u521d\u5b66\u8005\u4f7f\u7528\u3002<\/p>\n<\/p>\n
\u590d\u6742\u8fed\u4ee3<\/h4>\n<\/p>\n
\u5f53\u6211\u4eec\u9700\u8981\u5728\u8fed\u4ee3\u8fc7\u7a0b\u4e2d\u8fdb\u884c\u4e00\u4e9b\u590d\u6742\u7684\u903b\u8f91\u64cd\u4f5c\u65f6\uff0cfor<\/code>\u5faa\u73af\u4f9d\u7136\u662f\u4e00\u4e2a\u5f88\u597d\u7684\u9009\u62e9\u3002<\/p>\n<\/p>\n
# \u521b\u5efa\u4e00\u4e2a\u7b80\u5355\u7684\u5217\u8868<\/p>\n
numbers = [1, 2, 3, 4, 5]<\/p>\n
\u4f7f\u7528for\u5faa\u73af\u8fed\u4ee3\u5217\u8868\u5e76\u8fdb\u884c\u590d\u6742\u64cd\u4f5c<\/strong><\/h2>\n
for number in numbers:<\/p>\n
    if number % 2 == 0:<\/p>\n
        print(f"{number} is even")<\/p>\n
    else:<\/p>\n
        print(f"{number} is odd")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u5728\u8fed\u4ee3\u8fc7\u7a0b\u4e2d\u6dfb\u52a0\u4e86\u6761\u4ef6\u5224\u65ad\uff0c\u5206\u522b\u8f93\u51fa\u5076\u6570\u548c\u5947\u6570\u7684\u4fe1\u606f\u3002for<\/code>\u5faa\u73af\u7684\u7075\u6d3b\u6027\u4f7f\u5f97\u5b83\u53ef\u4ee5\u5904\u7406\u5404\u79cd\u590d\u6742\u7684\u8fed\u4ee3\u9700\u6c42\u3002<\/p>\n<\/p>\n
\u4e8c\u3001\u5217\u8868\u63a8\u5bfc\u5f0f\u8fed\u4ee3<\/h3>\n<\/p>\n
\u5217\u8868\u63a8\u5bfc\u5f0f\uff08List Comprehension\uff09\u662fPython\u4e2d\u7279\u6709\u7684\u8bed\u6cd5\u7cd6\uff0c\u5b83\u8ba9\u6211\u4eec\u53ef\u4ee5\u7528\u4e00\u79cd\u7b80\u6d01\u7684\u65b9\u5f0f\u6765\u521b\u5efa\u548c\u64cd\u4f5c\u5217\u8868\u3002\u5176\u8bed\u6cd5\u7b80\u6d01\u4e14\u8fd0\u884c\u6548\u7387\u9ad8\uff0c\u9002\u5408\u5728\u7b80\u5355\u8fed\u4ee3\u64cd\u4f5c\u4e2d\u4f7f\u7528\u3002<\/p>\n<\/p>\n
\u57fa\u672c\u7528\u6cd5<\/h4>\n<\/p>\n
# \u521b\u5efa\u4e00\u4e2a\u7b80\u5355\u7684\u5217\u8868<\/p>\n
numbers = [1, 2, 3, 4, 5]<\/p>\n
\u4f7f\u7528\u5217\u8868\u63a8\u5bfc\u5f0f\u8fed\u4ee3\u5217\u8868\u5e76\u751f\u6210\u65b0\u7684\u5217\u8868<\/strong><\/h2>\n
squared_numbers = [number  2 for number in numbers]<\/p>\n
print(squared_numbers)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528\u5217\u8868\u63a8\u5bfc\u5f0f\u751f\u6210\u4e86\u4e00\u4e2a\u65b0\u7684\u5217\u8868\uff0c\u5176\u4e2d\u6bcf\u4e2a\u5143\u7d20\u90fd\u662f\u539f\u5217\u8868\u4e2d\u5bf9\u5e94\u5143\u7d20\u7684\u5e73\u65b9\u3002\u5217\u8868\u63a8\u5bfc\u5f0f\u8ba9\u4ee3\u7801\u66f4\u52a0\u7b80\u6d01\u3001\u6613\u8bfb\u3002<\/p>\n<\/p>\n
\u5e26\u6761\u4ef6\u7684\u5217\u8868\u63a8\u5bfc\u5f0f<\/h4>\n<\/p>\n
\u5217\u8868\u63a8\u5bfc\u5f0f\u4e5f\u53ef\u4ee5\u5305\u542b\u6761\u4ef6\u5224\u65ad\uff0c\u4ece\u800c\u5b9e\u73b0\u66f4\u52a0\u590d\u6742\u7684\u5217\u8868\u751f\u6210\u903b\u8f91\u3002<\/p>\n<\/p>\n
# \u521b\u5efa\u4e00\u4e2a\u7b80\u5355\u7684\u5217\u8868<\/p>\n
numbers = [1, 2, 3, 4, 5]<\/p>\n
\u4f7f\u7528\u5e26\u6761\u4ef6\u7684\u5217\u8868\u63a8\u5bfc\u5f0f\u8fed\u4ee3\u5217\u8868\u5e76\u751f\u6210\u65b0\u7684\u5217\u8868<\/strong><\/h2>\n
even_squared_numbers = [number  2 for number in numbers if number % 2 == 0]<\/p>\n
print(even_squared_numbers)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528\u5217\u8868\u63a8\u5bfc\u5f0f\u751f\u6210\u4e86\u4e00\u4e2a\u65b0\u7684\u5217\u8868\uff0c\u5176\u4e2d\u53ea\u5305\u542b\u539f\u5217\u8868\u4e2d\u7684\u5076\u6570\u5143\u7d20\u7684\u5e73\u65b9\u3002\u8fd9\u6837\u7684\u8bed\u6cd5\u4e0d\u4ec5\u7b80\u6d01\uff0c\u800c\u4e14\u975e\u5e38\u5f3a\u5927\u3002<\/p>\n<\/p>\n
\u4e09\u3001MAP\u51fd\u6570\u8fed\u4ee3\u5217\u8868<\/h3>\n<\/p>\n
map<\/code>\u51fd\u6570\u662fPython\u5185\u7f6e\u7684\u9ad8\u9636\u51fd\u6570\u4e4b\u4e00\uff0c\u5b83\u53ef\u4ee5\u5c06\u4e00\u4e2a\u51fd\u6570\u5e94\u7528\u5230\u4e00\u4e2a\u6216\u591a\u4e2a\u5217\u8868\uff08\u6216\u5176\u4ed6\u53ef\u8fed\u4ee3\u5bf9\u8c61\uff09\u7684\u6bcf\u4e2a\u5143\u7d20\u4e0a\uff0c\u5e76\u8fd4\u56de\u4e00\u4e2a\u8fed\u4ee3\u5668\u3002<\/p>\n<\/p>\n
\u57fa\u672c\u7528\u6cd5<\/h4>\n<\/p>\n
# \u521b\u5efa\u4e00\u4e2a\u7b80\u5355\u7684\u5217\u8868<\/p>\n
numbers = [1, 2, 3, 4, 5]<\/p>\n
\u4f7f\u7528map\u51fd\u6570\u8fed\u4ee3\u5217\u8868\u5e76\u751f\u6210\u65b0\u7684\u5217\u8868<\/strong><\/h2>\n
squared_numbers = list(map(lambda x: x  2, numbers))<\/p>\n
print(squared_numbers)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528map<\/code>\u51fd\u6570\u548clambda<\/code>\u8868\u8fbe\u5f0f\u751f\u6210\u4e86\u4e00\u4e2a\u65b0\u7684\u5217\u8868\uff0c\u5176\u4e2d\u6bcf\u4e2a\u5143\u7d20\u90fd\u662f\u539f\u5217\u8868\u4e2d\u5bf9\u5e94\u5143\u7d20\u7684\u5e73\u65b9\u3002map<\/code>\u51fd\u6570\u9002\u5408\u7528\u4e8e\u9700\u8981\u5c06\u76f8\u540c\u64cd\u4f5c\u5e94\u7528\u5230\u5217\u8868\u4e2d\u6bcf\u4e2a\u5143\u7d20\u7684\u573a\u666f\u3002<\/p>\n<\/p>\n
\u7ed3\u5408\u591a\u4e2a\u5217\u8868<\/h4>\n<\/p>\n
map<\/code>\u51fd\u6570\u8fd8\u53ef\u4ee5\u7ed3\u5408\u591a\u4e2a\u5217\u8868\u8fdb\u884c\u8fed\u4ee3\u64cd\u4f5c\u3002<\/p>\n<\/p>\n
# \u521b\u5efa\u4e24\u4e2a\u7b80\u5355\u7684\u5217\u8868<\/p>\n
list1 = [1, 2, 3, 4, 5]<\/p>\n
list2 = [10, 20, 30, 40, 50]<\/p>\n
\u4f7f\u7528map\u51fd\u6570\u8fed\u4ee3\u591a\u4e2a\u5217\u8868\u5e76\u751f\u6210\u65b0\u7684\u5217\u8868<\/strong><\/h2>\n
summed_list = list(map(lambda x, y: x + y, list1, list2))<\/p>\n
print(summed_list)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528map<\/code>\u51fd\u6570\u548clambda<\/code>\u8868\u8fbe\u5f0f\u751f\u6210\u4e86\u4e00\u4e2a\u65b0\u7684\u5217\u8868\uff0c\u5176\u4e2d\u6bcf\u4e2a\u5143\u7d20\u662f\u4e24\u4e2a\u539f\u5217\u8868\u4e2d\u5bf9\u5e94\u5143\u7d20\u7684\u548c\u3002map<\/code>\u51fd\u6570\u7684\u8fd9\u79cd\u7279\u6027\u4f7f\u5f97\u5b83\u5728\u5904\u7406\u591a\u4e2a\u5217\u8868\u7684\u573a\u666f\u4e2d\u975e\u5e38\u6709\u7528\u3002<\/p>\n<\/p>\n
\u56db\u3001FILTER\u51fd\u6570\u8fed\u4ee3\u5217\u8868<\/h3>\n<\/p>\n
filter<\/code>\u51fd\u6570\u662fPython\u5185\u7f6e\u7684\u53e6\u4e00\u4e2a\u9ad8\u9636\u51fd\u6570\uff0c\u5b83\u53ef\u4ee5\u6839\u636e\u4e00\u4e2a\u51fd\u6570\u7684\u8fd4\u56de\u503c\u5bf9\u5217\u8868\u4e2d\u7684\u5143\u7d20\u8fdb\u884c\u7b5b\u9009\uff0c\u5e76\u8fd4\u56de\u4e00\u4e2a\u8fed\u4ee3\u5668\u3002<\/p>\n<\/p>\n
\u57fa\u672c\u7528\u6cd5<\/h4>\n<\/p>\n
# \u521b\u5efa\u4e00\u4e2a\u7b80\u5355\u7684\u5217\u8868<\/p>\n
numbers = [1, 2, 3, 4, 5]<\/p>\n
\u4f7f\u7528filter\u51fd\u6570\u8fed\u4ee3\u5217\u8868\u5e76\u751f\u6210\u65b0\u7684\u5217\u8868<\/strong><\/h2>\n
even_numbers = list(filter(lambda x: x % 2 == 0, numbers))<\/p>\n
print(even_numbers)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528filter<\/code>\u51fd\u6570\u548clambda<\/code>\u8868\u8fbe\u5f0f\u751f\u6210\u4e86\u4e00\u4e2a\u65b0\u7684\u5217\u8868\uff0c\u5176\u4e2d\u53ea\u5305\u542b\u539f\u5217\u8868\u4e2d\u7684\u5076\u6570\u5143\u7d20\u3002filter<\/code>\u51fd\u6570\u975e\u5e38\u9002\u5408\u7528\u4e8e\u9700\u8981\u5bf9\u5217\u8868\u8fdb\u884c\u7b5b\u9009\u7684\u573a\u666f\u3002<\/p>\n<\/p>\n
\u7ed3\u5408\u590d\u6742\u6761\u4ef6<\/h4>\n<\/p>\n
filter<\/code>\u51fd\u6570\u8fd8\u53ef\u4ee5\u7ed3\u5408\u590d\u6742\u7684\u6761\u4ef6\u8fdb\u884c\u7b5b\u9009\u64cd\u4f5c\u3002<\/p>\n<\/p>\n
# \u521b\u5efa\u4e00\u4e2a\u7b80\u5355\u7684\u5217\u8868<\/p>\n
numbers = [1, 2, 3, 4, 5]<\/p>\n
\u4f7f\u7528filter\u51fd\u6570\u8fed\u4ee3\u5217\u8868\u5e76\u751f\u6210\u65b0\u7684\u5217\u8868<\/strong><\/h2>\n
filtered_numbers = list(filter(lambda x: x % 2 == 0 and x > 2, numbers))<\/p>\n
print(filtered_numbers)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528filter<\/code>\u51fd\u6570\u548clambda<\/code>\u8868\u8fbe\u5f0f\u751f\u6210\u4e86\u4e00\u4e2a\u65b0\u7684\u5217\u8868\uff0c\u5176\u4e2d\u53ea\u5305\u542b\u539f\u5217\u8868\u4e2d\u5927\u4e8e2\u7684\u5076\u6570\u5143\u7d20\u3002filter<\/code>\u51fd\u6570\u7684\u8fd9\u79cd\u7279\u6027\u4f7f\u5f97\u5b83\u5728\u5904\u7406\u590d\u6742\u7b5b\u9009\u6761\u4ef6\u7684\u573a\u666f\u4e2d\u975e\u5e38\u6709\u7528\u3002<\/p>\n<\/p>\n
\u4e94\u3001\u679a\u4e3e\u51fd\u6570\u8fed\u4ee3\u5217\u8868<\/h3>\n<\/p>\n
enumerate<\/code>\u51fd\u6570\u662fPython\u5185\u7f6e\u7684\u4e00\u4e2a\u51fd\u6570\uff0c\u5b83\u53ef\u4ee5\u540c\u65f6\u8fed\u4ee3\u5217\u8868\u7684\u5143\u7d20\u53ca\u5176\u7d22\u5f15\u3002<\/p>\n<\/p>\n
\u57fa\u672c\u7528\u6cd5<\/h4>\n<\/p>\n
# \u521b\u5efa\u4e00\u4e2a\u7b80\u5355\u7684\u5217\u8868<\/p>\n
numbers = [1, 2, 3, 4, 5]<\/p>\n
\u4f7f\u7528enumerate\u51fd\u6570\u8fed\u4ee3\u5217\u8868<\/strong><\/h2>\n
for index, number in enumerate(numbers):<\/p>\n
    print(f"Index: {index}, Number: {number}")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528enumerate<\/code>\u51fd\u6570\u540c\u65f6\u8fed\u4ee3\u4e86\u5217\u8868\u7684\u5143\u7d20\u53ca\u5176\u7d22\u5f15\uff0c\u5e76\u5c06\u5176\u6253\u5370\u51fa\u6765\u3002enumerate<\/code>\u51fd\u6570\u975e\u5e38\u9002\u5408\u7528\u4e8e\u9700\u8981\u540c\u65f6\u8bbf\u95ee\u5143\u7d20\u548c\u7d22\u5f15\u7684\u573a\u666f\u3002<\/p>\n<\/p>\n
\u516d\u3001ZIP\u51fd\u6570\u8fed\u4ee3\u591a\u4e2a\u5217\u8868<\/h3>\n<\/p>\n
zip<\/code>\u51fd\u6570\u662fPython\u5185\u7f6e\u7684\u4e00\u4e2a\u51fd\u6570\uff0c\u5b83\u53ef\u4ee5\u5c06\u591a\u4e2a\u5217\u8868\u6253\u5305\u6210\u4e00\u4e2a\u8fed\u4ee3\u5668\uff0c\u4ece\u800c\u5b9e\u73b0\u540c\u65f6\u8fed\u4ee3\u591a\u4e2a\u5217\u8868\u3002<\/p>\n<\/p>\n
\u57fa\u672c\u7528\u6cd5<\/h4>\n<\/p>\n
# \u521b\u5efa\u4e24\u4e2a\u7b80\u5355\u7684\u5217\u8868<\/p>\n
list1 = [1, 2, 3, 4, 5]<\/p>\n
list2 = [10, 20, 30, 40, 50]<\/p>\n
\u4f7f\u7528zip\u51fd\u6570\u8fed\u4ee3\u591a\u4e2a\u5217\u8868<\/strong><\/h2>\n
for num1, num2 in zip(list1, list2):<\/p>\n
    print(f"Num1: {num1}, Num2: {num2}")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528zip<\/code>\u51fd\u6570\u5c06\u4e24\u4e2a\u5217\u8868\u6253\u5305\u6210\u4e00\u4e2a\u8fed\u4ee3\u5668\uff0c\u5e76\u540c\u65f6\u8fed\u4ee3\u4e86\u8fd9\u4e24\u4e2a\u5217\u8868\u7684\u5143\u7d20\u3002zip<\/code>\u51fd\u6570\u975e\u5e38\u9002\u5408\u7528\u4e8e\u9700\u8981\u540c\u65f6\u8fed\u4ee3\u591a\u4e2a\u5217\u8868\u7684\u573a\u666f\u3002<\/p>\n<\/p>\n
\u4e03\u3001\u8fed\u4ee3\u5de5\u5177\u6a21\u5757\u4e2d\u7684\u8fed\u4ee3\u5668<\/h3>\n<\/p>\n
Python\u7684itertools<\/code>\u6a21\u5757\u63d0\u4f9b\u4e86\u4e00\u7ec4\u7528\u4e8e\u9ad8\u6548\u5904\u7406\u8fed\u4ee3\u64cd\u4f5c\u7684\u5de5\u5177\u3002\u8fd9\u4e2a\u6a21\u5757\u4e2d\u7684\u8fed\u4ee3\u5668\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u5b9e\u73b0\u5404\u79cd\u590d\u6742\u7684\u8fed\u4ee3\u903b\u8f91\u3002<\/p>\n<\/p>\n
\u57fa\u672c\u7528\u6cd5<\/h4>\n<\/p>\n
import itertools<\/p>\n
\u521b\u5efa\u4e00\u4e2a\u7b80\u5355\u7684\u5217\u8868<\/strong><\/h2>\n
numbers = [1, 2, 3, 4, 5]<\/p>\n
\u4f7f\u7528itertools.cycle\u51fd\u6570\u521b\u5efa\u4e00\u4e2a\u65e0\u9650\u5faa\u73af\u8fed\u4ee3\u5668<\/strong><\/h2>\n
cycle_iterator = itertools.cycle(numbers)<\/p>\n
\u6253\u5370\u5faa\u73af\u8fed\u4ee3\u5668\u4e2d\u7684\u524d10\u4e2a\u5143\u7d20<\/strong><\/h2>\n
for _ in range(10):<\/p>\n
    print(next(cycle_iterator))<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528itertools.cycle<\/code>\u51fd\u6570\u521b\u5efa\u4e86\u4e00\u4e2a\u65e0\u9650\u5faa\u73af\u7684\u8fed\u4ee3\u5668\uff0c\u5e76\u6253\u5370\u4e86\u5faa\u73af\u8fed\u4ee3\u5668\u4e2d\u7684\u524d10\u4e2a\u5143\u7d20\u3002itertools<\/code>\u6a21\u5757\u63d0\u4f9b\u7684\u8fed\u4ee3\u5668\u975e\u5e38\u9002\u5408\u7528\u4e8e\u9700\u8981\u9ad8\u6548\u5904\u7406\u590d\u6742\u8fed\u4ee3\u903b\u8f91\u7684\u573a\u666f\u3002<\/p>\n<\/p>\n
\u9ad8\u7ea7\u7528\u6cd5<\/h4>\n<\/p>\n
itertools<\/code>\u6a21\u5757\u8fd8\u63d0\u4f9b\u4e86\u8bb8\u591a\u5176\u4ed6\u6709\u7528\u7684\u8fed\u4ee3\u5668\uff0c\u4f8b\u5982itertools.chAI<\/a>n<\/code>\u3001itertools.islice<\/code>\u7b49\u3002<\/p>\n<\/p>\n
import itertools<\/p>\n
\u521b\u5efa\u4e24\u4e2a\u7b80\u5355\u7684\u5217\u8868<\/strong><\/h2>\n
list1 = [1, 2, 3, 4, 5]<\/p>\n
list2 = [10, 20, 30, 40, 50]<\/p>\n
\u4f7f\u7528itertools.chain\u51fd\u6570\u5c06\u591a\u4e2a\u5217\u8868\u4e32\u8054\u6210\u4e00\u4e2a\u8fed\u4ee3\u5668<\/strong><\/h2>\n
chained_iterator = itertools.chain(list1, list2)<\/p>\n
\u6253\u5370\u4e32\u8054\u8fed\u4ee3\u5668\u4e2d\u7684\u6240\u6709\u5143\u7d20<\/strong><\/h2>\n
for number in chained_iterator:<\/p>\n
    print(number)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528itertools.chain<\/code>\u51fd\u6570\u5c06\u4e24\u4e2a\u5217\u8868\u4e32\u8054\u6210\u4e00\u4e2a\u8fed\u4ee3\u5668\uff0c\u5e76\u6253\u5370\u4e86\u4e32\u8054\u8fed\u4ee3\u5668\u4e2d\u7684\u6240\u6709\u5143\u7d20\u3002itertools<\/code>\u6a21\u5757\u63d0\u4f9b\u7684\u8fed\u4ee3\u5668\u975e\u5e38\u9002\u5408\u7528\u4e8e\u9700\u8981\u9ad8\u6548\u5904\u7406\u590d\u6742\u8fed\u4ee3\u903b\u8f91\u7684\u573a\u666f\u3002<\/p>\n<\/p>\n
\u516b\u3001\u751f\u6210\u5668\u8fed\u4ee3<\/h3>\n<\/p>\n
\u751f\u6210\u5668\u662fPython\u4e2d\u7684\u4e00\u79cd\u7279\u6b8a\u51fd\u6570\uff0c\u5b83\u53ef\u4ee5\u5728\u6267\u884c\u8fc7\u7a0b\u4e2d\u4ea7\u751f\u4e00\u4e2a\u503c\u5e8f\u5217\uff0c\u5e76\u4e14\u6bcf\u6b21\u8c03\u7528\u65f6\u8fd4\u56de\u4e00\u4e2a\u503c\u3002\u751f\u6210\u5668\u53ef\u4ee5\u901a\u8fc7yield<\/code>\u5173\u952e\u5b57\u6765\u5b9e\u73b0\u3002<\/p>\n<\/p>\n
\u57fa\u672c\u7528\u6cd5<\/h4>\n<\/p>\n
# \u5b9a\u4e49\u4e00\u4e2a\u751f\u6210\u5668\u51fd\u6570<\/p>\n
def simple_generator():<\/p>\n
    yield 1<\/p>\n
    yield 2<\/p>\n
    yield 3<\/p>\n
\u4f7f\u7528\u751f\u6210\u5668\u51fd\u6570\u521b\u5efa\u4e00\u4e2a\u751f\u6210\u5668\u5bf9\u8c61<\/strong><\/h2>\n
gen = simple_generator()<\/p>\n
\u8fed\u4ee3\u751f\u6210\u5668\u5bf9\u8c61<\/strong><\/h2>\n
for value in gen:<\/p>\n
    print(value)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u5b9a\u4e49\u4e86\u4e00\u4e2a\u7b80\u5355\u7684\u751f\u6210\u5668\u51fd\u6570\uff0c\u5e76\u4f7f\u7528\u5b83\u521b\u5efa\u4e86\u4e00\u4e2a\u751f\u6210\u5668\u5bf9\u8c61\u3002\u751f\u6210\u5668\u51fd\u6570\u53ef\u4ee5\u5728\u6267\u884c\u8fc7\u7a0b\u4e2d\u4ea7\u751f\u591a\u4e2a\u503c\uff0c\u5e76\u4e14\u6bcf\u6b21\u8c03\u7528\u65f6\u8fd4\u56de\u4e00\u4e2a\u503c\u3002\u751f\u6210\u5668\u975e\u5e38\u9002\u5408\u7528\u4e8e\u9700\u8981\u60f0\u6027\u6c42\u503c\u7684\u573a\u666f\u3002<\/p>\n<\/p>\n
\u590d\u6742\u751f\u6210\u5668<\/h4>\n<\/p>\n
\u751f\u6210\u5668\u8fd8\u53ef\u4ee5\u7528\u4e8e\u5b9e\u73b0\u590d\u6742\u7684\u8fed\u4ee3\u903b\u8f91\u3002<\/p>\n<\/p>\n
# \u5b9a\u4e49\u4e00\u4e2a\u751f\u6210\u5668\u51fd\u6570<\/p>\n
def fibonacci_generator(n):<\/p>\n
    a, b = 0, 1<\/p>\n
    for _ in range(n):<\/p>\n
        yield a<\/p>\n
        a, b = b, a + b<\/p>\n
\u4f7f\u7528\u751f\u6210\u5668\u51fd\u6570\u521b\u5efa\u4e00\u4e2a\u751f\u6210\u5668\u5bf9\u8c61<\/strong><\/h2>\n
fib_gen = fibonacci_generator(10)<\/p>\n
\u8fed\u4ee3\u751f\u6210\u5668\u5bf9\u8c61<\/strong><\/h2>\n
for value in fib_gen:<\/p>\n
    print(value)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u5b9a\u4e49\u4e86\u4e00\u4e2a\u751f\u6210\u5668\u51fd\u6570\u6765\u751f\u6210\u6590\u6ce2\u90a3\u5951\u6570\u5217\uff0c\u5e76\u4f7f\u7528\u5b83\u521b\u5efa\u4e86\u4e00\u4e2a\u751f\u6210\u5668\u5bf9\u8c61\u3002\u751f\u6210\u5668\u51fd\u6570\u53ef\u4ee5\u5b9e\u73b0\u5404\u79cd\u590d\u6742\u7684\u8fed\u4ee3\u903b\u8f91\uff0c\u975e\u5e38\u9002\u5408\u7528\u4e8e\u9700\u8981\u9ad8\u6548\u5904\u7406\u590d\u6742\u8fed\u4ee3\u903b\u8f91\u7684\u573a\u666f\u3002<\/p>\n<\/p>\n
\u4e5d\u3001\u5d4c\u5957\u5217\u8868\u8fed\u4ee3<\/h3>\n<\/p>\n
\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u53ef\u80fd\u9700\u8981\u8fed\u4ee3\u5d4c\u5957\u5217\u8868\uff08\u5373\u5217\u8868\u4e2d\u7684\u5143\u7d20\u4e5f\u662f\u5217\u8868\uff09\u3002\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u5d4c\u5957\u7684for<\/code>\u5faa\u73af\u6216\u8005\u9012\u5f52\u51fd\u6570\u6765\u5b9e\u73b0\u3002<\/p>\n<\/p>\n
\u4f7f\u7528\u5d4c\u5957\u7684FOR\u5faa\u73af<\/h4>\n<\/p>\n
# \u521b\u5efa\u4e00\u4e2a\u5d4c\u5957\u5217\u8868<\/p>\n
nested_list = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]<\/p>\n
\u4f7f\u7528\u5d4c\u5957\u7684for\u5faa\u73af\u8fed\u4ee3\u5d4c\u5957\u5217\u8868<\/strong><\/h2>\n
for sublist in nested_list:<\/p>\n
    for item in sublist:<\/p>\n
        print(item)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528\u5d4c\u5957\u7684for<\/code>\u5faa\u73af\u8fed\u4ee3\u4e86\u5d4c\u5957\u5217\u8868\u4e2d\u7684\u6bcf\u4e00\u4e2a\u5143\u7d20\u3002\u5d4c\u5957\u7684for<\/code>\u5faa\u73af\u975e\u5e38\u9002\u5408\u7528\u4e8e\u5904\u7406\u7ed3\u6784\u7b80\u5355\u7684\u5d4c\u5957\u5217\u8868\u3002<\/p>\n<\/p>\n
\u4f7f\u7528\u9012\u5f52\u51fd\u6570<\/h4>\n<\/p>\n
\u5bf9\u4e8e\u7ed3\u6784\u590d\u6742\u7684\u5d4c\u5957\u5217\u8868\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u9012\u5f52\u51fd\u6570\u6765\u5b9e\u73b0\u8fed\u4ee3\u3002<\/p>\n<\/p>\n
# \u5b9a\u4e49\u4e00\u4e2a\u9012\u5f52\u51fd\u6570\u6765\u8fed\u4ee3\u5d4c\u5957\u5217\u8868<\/p>\n
def iterate_nested_list(nested_list):<\/p>\n
    for item in nested_list:<\/p>\n
        if isinstance(item, list):<\/p>\n
            iterate_nested_list(item)<\/p>\n
        else:<\/p>\n
            print(item)<\/p>\n
\u521b\u5efa\u4e00\u4e2a\u590d\u6742\u7684\u5d4c\u5957\u5217\u8868<\/strong><\/h2>\n
complex_nested_list = [1, [2, [3, 4], 5], 6, [7, 8, [9, 10]]]<\/p>\n
\u4f7f\u7528\u9012\u5f52\u51fd\u6570\u8fed\u4ee3\u5d4c\u5957\u5217\u8868<\/strong><\/h2>\n
iterate_nested_list(complex_nested_list)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u5b9a\u4e49\u4e86\u4e00\u4e2a\u9012\u5f52\u51fd\u6570\u6765\u8fed\u4ee3\u5d4c\u5957\u5217\u8868\u4e2d\u7684\u6bcf\u4e00\u4e2a\u5143\u7d20\u3002\u9012\u5f52\u51fd\u6570\u975e\u5e38\u9002\u5408\u7528\u4e8e\u5904\u7406\u7ed3\u6784\u590d\u6742\u7684\u5d4c\u5957\u5217\u8868\u3002<\/p>\n<\/p>\n
\u5341\u3001\u603b\u7ed3<\/h3>\n<\/p>\n
\u5728Python\u4e2d\uff0c\u6709\u591a\u79cd\u65b9\u6cd5\u53ef\u4ee5\u7528\u4e8e\u5217\u8868\u8fed\u4ee3\uff0c\u5305\u62ecfor<\/code>\u5faa\u73af\u3001\u5217\u8868\u63a8\u5bfc\u5f0f\u3001map<\/code>\u51fd\u6570\u3001filter<\/code>\u51fd\u6570\u3001enumerate<\/code>\u51fd\u6570\u3001zip<\/code>\u51fd\u6570\u3001itertools<\/code>\u6a21\u5757\u4e2d\u7684\u8fed\u4ee3\u5668\u3001\u751f\u6210\u5668\u4ee5\u53ca\u5904\u7406\u5d4c\u5957\u5217\u8868\u7684\u5d4c\u5957\u5faa\u73af\u548c\u9012\u5f52\u51fd\u6570\u3002\u4e0d\u540c\u7684\u65b9\u6cd5\u9002\u7528\u4e8e\u4e0d\u540c\u7684\u573a\u666f\uff0c\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\u53ef\u4ee5\u8ba9\u6211\u4eec\u7684\u4ee3\u7801\u66f4\u52a0\u7b80\u6d01\u3001\u9ad8\u6548\u548c\u6613\u8bfb\u3002<\/p>\n<\/p>\n
\u9009\u62e9\u65b9\u6cd5\u65f6\u5e94\u8003\u8651\u4ee5\u4e0b\u56e0\u7d20\uff1a<\/strong><\/p>\n<\/p>\n
    \n
  • \u4ee3\u7801\u7b80\u6d01\u6027\uff1a<\/strong> \u5217\u8868\u63a8\u5bfc\u5f0f\u548c\u751f\u6210\u5668\u8868\u8fbe\u5f0f\u901a\u5e38\u80fd\u4f7f\u4ee3\u7801\u66f4\u52a0\u7b80\u6d01\u3002<\/li>\n
  • \u4ee3\u7801\u53ef\u8bfb\u6027\uff1a<\/strong> for<\/code>\u5faa\u73af\u548cenumerate<\/code>\u51fd\u6570\u7684\u53ef\u8bfb\u6027\u8f83\u9ad8\uff0c\u9002\u5408\u590d\u6742\u7684\u8fed\u4ee3\u903b\u8f91\u3002<\/li>\n
  • \u6027\u80fd\uff1a<\/strong> map<\/code>\u548cfilter<\/code>\u51fd\u6570\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\u6bd4\u5217\u8868\u63a8\u5bfc\u5f0f\u66f4\u9ad8\u6548\u3002<\/li>\n
  • \u590d\u6742\u6027\uff1a<\/strong> \u5bf9\u4e8e\u590d\u6742\u7684\u5d4c\u5957\u7ed3\u6784\uff0c\u9012\u5f52\u51fd\u6570\u66f4\u6613\u4e8e\u5904\u7406\u3002<\/li>\n<\/ul>\n
    \u901a\u8fc7\u638c\u63e1\u8fd9\u4e9b\u65b9\u6cd5\uff0c\u6211\u4eec\u53ef\u4ee5\u66f4\u52a0\u7075\u6d3b\u5730\u5904\u7406\u5404\u79cd\u5217\u8868\u8fed\u4ee3\u9700\u6c42\uff0c\u63d0\u9ad8\u4ee3\u7801\u7684\u8d28\u91cf\u548c\u6548\u7387\u3002<\/p>\n<\/p>\n
    \u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
     \u5982\u4f55\u5728Python\u4e2d\u4f7f\u7528for\u5faa\u73af\u8fed\u4ee3\u5217\u8868\uff1f<\/strong>
    \u5728Python\u4e2d\uff0c\u4f7f\u7528for\u5faa\u73af\u662f\u8fed\u4ee3\u5217\u8868\u6700\u5e38\u89c1\u7684\u65b9\u5f0f\u3002\u901a\u8fc7for\u5faa\u73af\uff0c\u53ef\u4ee5\u4f9d\u6b21\u8bbf\u95ee\u5217\u8868\u4e2d\u7684\u6bcf\u4e00\u4e2a\u5143\u7d20\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
    my_list = [1, 2, 3, 4, 5]\nfor item in my_list:\n    print(item)\n<\/code><\/pre>\n
    \u8fd9\u79cd\u65b9\u6cd5\u7b80\u5355\u6613\u61c2\uff0c\u9002\u5408\u521d\u5b66\u8005\u4f7f\u7528\u3002<\/p>\n
    Python\u4e2d\u6709\u54ea\u4e9b\u65b9\u6cd5\u53ef\u4ee5\u8fed\u4ee3\u5217\u8868\u7684\u5143\u7d20\uff1f<\/strong>
    \u9664\u4e86for\u5faa\u73af\u4e4b\u5916\uff0c\u8fd8\u53ef\u4ee5\u4f7f\u7528while\u5faa\u73af\u3001\u5217\u8868\u63a8\u5bfc\u5f0f\u548c\u5185\u7f6e\u7684map\u51fd\u6570\u7b49\u65b9\u6cd5\u8fdb\u884c\u5217\u8868\u8fed\u4ee3\u3002while\u5faa\u73af\u9700\u8981\u624b\u52a8\u7ba1\u7406\u7d22\u5f15\uff0c\u800c\u5217\u8868\u63a8\u5bfc\u5f0f\u53ef\u4ee5\u5728\u4e00\u884c\u4ee3\u7801\u4e2d\u751f\u6210\u65b0\u5217\u8868\u3002\u4f7f\u7528map\u51fd\u6570\u53ef\u4ee5\u5c06\u4e00\u4e2a\u51fd\u6570\u5e94\u7528\u4e8e\u5217\u8868\u4e2d\u7684\u6bcf\u4e00\u4e2a\u5143\u7d20\uff0c\u8fd4\u56de\u4e00\u4e2a\u8fed\u4ee3\u5668\u3002\u4f8b\u5982\uff1a<\/p>\n
    squared = list(map(lambda x: x**2, my_list))\n<\/code><\/pre>\n
    \u8fd9\u4e9b\u65b9\u6cd5\u5404\u6709\u7279\u70b9\uff0c\u4f7f\u7528\u65f6\u53ef\u4ee5\u6839\u636e\u5177\u4f53\u9700\u6c42\u9009\u62e9\u3002<\/p>\n
    \u5982\u4f55\u5728\u8fed\u4ee3\u5217\u8868\u65f6\u83b7\u53d6\u5143\u7d20\u7684\u7d22\u5f15\uff1f<\/strong>
    \u5728Python\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528enumerate\u51fd\u6570\u6765\u540c\u65f6\u83b7\u53d6\u5217\u8868\u5143\u7d20\u53ca\u5176\u7d22\u5f15\u3002enumerate\u4f1a\u8fd4\u56de\u4e00\u4e2a\u5305\u542b\u7d22\u5f15\u548c\u5143\u7d20\u7684\u5143\u7ec4\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
    for index, value in enumerate(my_list):\n    print(f'Index: {index}, Value: {value}')\n<\/code><\/pre>\n
    \u8fd9\u79cd\u65b9\u6cd5\u975e\u5e38\u65b9\u4fbf\uff0c\u5c24\u5176\u662f\u5728\u9700\u8981\u540c\u65f6\u5904\u7406\u5143\u7d20\u548c\u7d22\u5f15\u7684\u60c5\u51b5\u4e0b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"Python\u5199\u5217\u8868\u8fed\u4ee3\u6709\u591a\u79cd\u65b9\u6cd5\uff0c\u5305\u62ec\u4f7f\u7528for\u5faa\u73af\u3001\u5217\u8868\u63a8\u5bfc\u5f0f\u3001map\u51fd\u6570\u3001filter\u51fd\u6570\u7b49\u3002\u5728\u8fd9\u4e9b\u65b9\u6cd5\u4e2d […]","protected":false},"author":3,"featured_media":1177983,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1177976"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=1177976"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1177976\/revisions"}],"predecessor-version":[{"id":1177985,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1177976\/revisions\/1177985"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/1177983"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=1177976"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=1177976"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=1177976"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}