{"id":1032700,"date":"2024-12-31T11:35:49","date_gmt":"2024-12-31T03:35:49","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1032700.html"},"modified":"2024-12-31T11:35:51","modified_gmt":"2024-12-31T03:35:51","slug":"python%e5%a6%82%e4%bd%95%e6%b1%82list%e4%b8%ad%e6%95%b0%e7%bb%84%e7%9a%84%e5%a4%a7%e5%b0%8f","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1032700.html","title":{"rendered":"python\u5982\u4f55\u6c42list\u4e2d\u6570\u7ec4\u7684\u5927\u5c0f"},"content":{"rendered":"

\"python\u5982\u4f55\u6c42list\u4e2d\u6570\u7ec4\u7684\u5927\u5c0f\"<\/p>\n

\u4f7f\u7528Python\u6c42\u4e00\u4e2a\u5217\u8868\u4e2d\u6570\u7ec4\u7684\u5927\u5c0f\u7684\u65b9\u6cd5\u6709\u591a\u79cd<\/strong>,\u4f8b\u5982\u53ef\u4ee5\u4f7f\u7528len()<\/code>\u51fd\u6570\u6765\u76f4\u63a5\u83b7\u5f97\u6570\u7ec4\u7684\u5927\u5c0f\u3001\u4f7f\u7528sys.getsizeof()<\/code>\u6765\u83b7\u5f97\u6570\u7ec4\u5728\u5185\u5b58\u4e2d\u7684\u5927\u5c0f\u7b49\u3002\u4e0b\u9762\u6211\u4eec\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u8fd9\u4e9b\u65b9\u6cd5\u5e76\u63d0\u4f9b\u76f8\u5e94\u7684\u4ee3\u7801\u793a\u4f8b\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u4f7f\u7528len()\u51fd\u6570<\/h3>\n<\/p>\n

len()<\/code>\u51fd\u6570\u662fPython\u5185\u7f6e\u51fd\u6570\u4e4b\u4e00\uff0c\u7528\u4e8e\u83b7\u53d6\u5bf9\u8c61(\u5982\u5217\u8868\u3001\u5b57\u7b26\u4e32\u3001\u5b57\u5178\u7b49)\u7684\u957f\u5ea6\uff0c\u5373\u5143\u7d20\u4e2a\u6570\u3002\u5728\u5904\u7406\u5217\u8868\u65f6\uff0clen()<\/code>\u51fd\u6570\u662f\u6700\u5e38\u7528\u7684\u65b9\u6cd5\u4e4b\u4e00\u3002\u4f7f\u7528len()<\/code>\u51fd\u6570\u53ef\u4ee5\u5feb\u901f\u83b7\u5f97\u5217\u8868\u7684\u5143\u7d20\u4e2a\u6570\uff0c\u8fd9\u5728\u5927\u591a\u6570\u60c5\u51b5\u4e0b\u5df2\u7ecf\u8db3\u591f\u4f7f\u7528<\/strong>\u3002<\/p>\n<\/p>\n

# \u793a\u4f8b\u4ee3\u7801<\/p>\n
my_list = [1, 2, 3, 4, 5]<\/p>\n
list_length = len(my_list)<\/p>\n
print(f"\u5217\u8868\u957f\u5ea6\u4e3a: {list_length}")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\uff0clen()<\/code>\u51fd\u6570\u8fd4\u56de\u5217\u8868 my_list<\/code> \u7684\u957f\u5ea6\uff0c\u8fd9\u91cc\u4e3a5\u3002\u8fd9\u4e2a\u65b9\u6cd5\u975e\u5e38\u7b80\u5355\u5b9e\u7528\uff0c\u9002\u7528\u4e8e\u5927\u591a\u6570\u9700\u8981\u83b7\u53d6\u5217\u8868\u957f\u5ea6\u7684\u60c5\u51b5\u3002<\/p>\n<\/p>\n
\u4e8c\u3001\u4f7f\u7528sys.getsizeof()\u51fd\u6570<\/h3>\n<\/p>\n
sys.getsizeof()<\/code>\u51fd\u6570\u53ef\u4ee5\u7528\u6765\u83b7\u53d6\u5bf9\u8c61\u7684\u5185\u5b58\u5360\u7528\u5927\u5c0f\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0csys.getsizeof()<\/code>\u8fd4\u56de\u7684\u662f\u5bf9\u8c61\u7684\u5185\u5b58\u5927\u5c0f\uff0c\u800c\u4e0d\u662f\u5217\u8868\u4e2d\u5143\u7d20\u7684\u4e2a\u6570\u3002\u8fd9\u5bf9\u4e8e\u60f3\u8981\u4e86\u89e3\u5217\u8868\u5728\u5185\u5b58\u4e2d\u5360\u7528\u591a\u5c11\u5b57\u8282\u7684\u60c5\u51b5\u975e\u5e38\u6709\u7528<\/strong>\u3002<\/p>\n<\/p>\n
import sys<\/p>\n
\u793a\u4f8b\u4ee3\u7801<\/strong><\/h2>\n
my_list = [1, 2, 3, 4, 5]<\/p>\n
list_size = sys.getsizeof(my_list)<\/p>\n
print(f"\u5217\u8868\u5360\u7528\u5185\u5b58\u5927\u5c0f\u4e3a: {list_size} \u5b57\u8282")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e0a\u8ff0\u4ee3\u7801\u4e2d\uff0csys.getsizeof()<\/code>\u51fd\u6570\u8fd4\u56de my_list<\/code> \u5728\u5185\u5b58\u4e2d\u7684\u5927\u5c0f\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u8fd9\u4e2a\u503c\u5305\u62ec\u4e86\u5bf9\u8c61\u7684\u5f00\u9500\uff0c\u4e0d\u4ec5\u4ec5\u662f\u5143\u7d20\u7684\u5927\u5c0f\u3002<\/p>\n<\/p>\n
\u4e09\u3001\u904d\u5386\u5217\u8868\u5e76\u8ba1\u7b97\u5143\u7d20\u4e2a\u6570<\/h3>\n<\/p>\n
\u9664\u4e86\u76f4\u63a5\u4f7f\u7528len()<\/code>\u51fd\u6570\u5916\uff0c\u6211\u4eec\u4e5f\u53ef\u4ee5\u901a\u8fc7\u904d\u5386\u5217\u8868\u6765\u624b\u52a8\u8ba1\u7b97\u5143\u7d20\u4e2a\u6570\u3002\u8fd9\u79cd\u65b9\u6cd5\u867d\u7136\u6ca1\u6709len()<\/code>\u51fd\u6570\u65b9\u4fbf\u5feb\u6377\uff0c\u4f46\u6709\u52a9\u4e8e\u52a0\u6df1\u5bf9\u5217\u8868\u7ed3\u6784\u7684\u7406\u89e3\u3002<\/p>\n<\/p>\n
# \u793a\u4f8b\u4ee3\u7801<\/p>\n
my_list = [1, 2, 3, 4, 5]<\/p>\n
count = 0<\/p>\n
for _ in my_list:<\/p>\n
    count += 1<\/p>\n
print(f"\u5217\u8868\u957f\u5ea6\u4e3a: {count}")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u901a\u8fc7\u904d\u5386\u5217\u8868\u5e76\u624b\u52a8\u8ba1\u6570\uff0c\u53ef\u4ee5\u6e05\u695a\u5730\u770b\u5230\u6bcf\u4e2a\u5143\u7d20\u662f\u5982\u4f55\u88ab\u8ba1\u7b97\u7684\u3002\u8fd9\u79cd\u65b9\u6cd5\u867d\u7136\u4e0d\u5982len()<\/code>\u51fd\u6570\u9ad8\u6548\uff0c\u4f46\u5728\u7406\u89e3\u5217\u8868\u7ed3\u6784\u65f6\u662f\u4e00\u4e2a\u5f88\u597d\u7684\u7ec3\u4e60\u3002<\/p>\n<\/p>\n
\u56db\u3001\u4f7f\u7528numpy\u5e93\u4e2d\u7684size\u5c5e\u6027<\/h3>\n<\/p>\n
\u5bf9\u4e8e\u5305\u542b\u6570\u503c\u7684\u5217\u8868\uff0c\u7279\u522b\u662f\u591a\u7ef4\u6570\u7ec4\uff0c\u4f7f\u7528numpy<\/code>\u5e93\u662f\u975e\u5e38\u65b9\u4fbf\u7684\u3002numpy<\/code>\u5e93\u4e2d\u7684size<\/code>\u5c5e\u6027\u53ef\u4ee5\u8f7b\u677e\u83b7\u53d6\u6570\u7ec4\u7684\u5143\u7d20\u603b\u6570\u3002<\/p>\n<\/p>\n
import numpy as np<\/p>\n
\u793a\u4f8b\u4ee3\u7801<\/strong><\/h2>\n
my_list = [1, 2, 3, 4, 5]<\/p>\n
np_array = np.array(my_list)<\/p>\n
array_size = np_array.size<\/p>\n
print(f"\u6570\u7ec4\u7684\u5143\u7d20\u603b\u6570\u4e3a: {array_size}")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u4e0a\u8ff0\u4f8b\u5b50\u4e2d\uff0cnumpy<\/code>\u5e93\u7684size<\/code>\u5c5e\u6027\u8fd4\u56de\u6570\u7ec4\u7684\u603b\u5143\u7d20\u6570\u3002\u8fd9\u5bf9\u4e8e\u5904\u7406\u591a\u7ef4\u6570\u7ec4\u7279\u522b\u6709\u7528\u3002<\/p>\n<\/p>\n
\u4e94\u3001\u603b\u7ed3<\/h3>\n<\/p>\n
\u4f7f\u7528len()<\/code>\u51fd\u6570\u83b7\u53d6\u5217\u8868\u957f\u5ea6\u6700\u4e3a\u5e38\u7528\u548c\u7b80\u4fbf<\/strong>\uff0c\u800csys.getsizeof()<\/code>\u51fd\u6570\u5219\u9002\u7528\u4e8e\u9700\u8981\u4e86\u89e3\u5bf9\u8c61\u5185\u5b58\u5360\u7528\u7684\u60c5\u51b5\u3002\u624b\u52a8\u904d\u5386\u5217\u8868\u867d\u7136\u4e0d\u5982\u524d\u4e24\u8005\u9ad8\u6548\uff0c\u4f46\u80fd\u5e2e\u52a9\u7406\u89e3\u5217\u8868\u7ed3\u6784\u3002\u5bf9\u4e8e\u591a\u7ef4\u6570\u7ec4\uff0cnumpy<\/code>\u5e93\u7684size<\/code>\u5c5e\u6027\u662f\u4e00\u4e2a\u5f3a\u6709\u529b\u7684\u5de5\u5177\u3002<\/p>\n<\/p>\n
\u901a\u8fc7\u4ee5\u4e0a\u51e0\u79cd\u65b9\u6cd5\uff0c\u6211\u4eec\u53ef\u4ee5\u6839\u636e\u4e0d\u540c\u9700\u6c42\uff0c\u9009\u62e9\u5408\u9002\u7684\u65b9\u5f0f\u6765\u6c42\u5217\u8868\u4e2d\u6570\u7ec4\u7684\u5927\u5c0f\u3002\u5e0c\u671b\u8fd9\u4e9b\u5185\u5bb9\u80fd\u591f\u5bf9\u60a8\u6709\u6240\u5e2e\u52a9\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
 \u5982\u4f55\u5728Python\u4e2d\u83b7\u53d6\u4e00\u4e2a\u5217\u8868\u7684\u957f\u5ea6\uff1f<\/strong>
\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u5185\u7f6e\u7684len()<\/code>\u51fd\u6570\u6765\u83b7\u53d6\u5217\u8868\u7684\u957f\u5ea6\u3002\u53ea\u9700\u5c06\u5217\u8868\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u7ed9len()<\/code>\uff0c\u5b83\u5c06\u8fd4\u56de\u5217\u8868\u4e2d\u5143\u7d20\u7684\u6570\u91cf\u3002\u4f8b\u5982\uff0clen(my_list)<\/code>\u5c06\u8fd4\u56demy_list<\/code>\u4e2d\u5143\u7d20\u7684\u603b\u6570\u3002<\/p>\n
\u5982\u4f55\u8ba1\u7b97\u5217\u8868\u4e2d\u6bcf\u4e2a\u5143\u7d20\u7684\u5927\u5c0f\uff1f<\/strong>
\u82e5\u60f3\u8ba1\u7b97\u5217\u8868\u4e2d\u6bcf\u4e2a\u5143\u7d20\u7684\u5927\u5c0f\uff0c\u53ef\u4ee5\u4f7f\u7528sys.getsizeof()<\/code>\u51fd\u6570\u3002\u9996\u5148\u9700\u5bfc\u5165sys<\/code>\u6a21\u5757\uff0c\u7136\u540e\u5bf9\u5217\u8868\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u5e94\u7528\u6b64\u51fd\u6570\u3002\u8fd9\u6837\u53ef\u4ee5\u83b7\u53d6\u6bcf\u4e2a\u5143\u7d20\u5360\u7528\u7684\u5b57\u8282\u6570\uff0c\u4f46\u8bf7\u6ce8\u610f\uff0c\u8fd9\u4e2a\u65b9\u6cd5\u8fd4\u56de\u7684\u662f\u5bf9\u8c61\u7684\u5185\u5b58\u5927\u5c0f\uff0c\u800c\u4e0d\u662f\u5177\u4f53\u7684\u5143\u7d20\u5185\u5bb9\u6216\u7ed3\u6784\u3002<\/p>\n
\u5982\u4f55\u7edf\u8ba1\u5217\u8868\u4e2d\u67d0\u4e2a\u7279\u5b9a\u5143\u7d20\u7684\u51fa\u73b0\u6b21\u6570\uff1f<\/strong>
\u8981\u7edf\u8ba1\u5217\u8868\u4e2d\u67d0\u4e2a\u7279\u5b9a\u5143\u7d20\u7684\u51fa\u73b0\u6b21\u6570\uff0c\u53ef\u4ee5\u4f7f\u7528\u5217\u8868\u7684count()<\/code>\u65b9\u6cd5\u3002\u4f8b\u5982\uff0cmy_list.count(element)<\/code>\u5c06\u8fd4\u56deelement<\/code>\u5728my_list<\/code>\u4e2d\u51fa\u73b0\u7684\u6b21\u6570\u3002\u8fd9\u5bf9\u4e8e\u5206\u6790\u6570\u636e\u6216\u5904\u7406\u91cd\u590d\u9879\u975e\u5e38\u6709\u7528\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u4f7f\u7528Python\u6c42\u4e00\u4e2a\u5217\u8868\u4e2d\u6570\u7ec4\u7684\u5927\u5c0f\u7684\u65b9\u6cd5\u6709\u591a\u79cd,\u4f8b\u5982\u53ef\u4ee5\u4f7f\u7528len()\u51fd\u6570\u6765\u76f4\u63a5\u83b7\u5f97\u6570\u7ec4\u7684\u5927\u5c0f\u3001\u4f7f\u7528sys […]","protected":false},"author":3,"featured_media":1032709,"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\/1032700"}],"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=1032700"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1032700\/revisions"}],"predecessor-version":[{"id":1032712,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1032700\/revisions\/1032712"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/1032709"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=1032700"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=1032700"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=1032700"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}