{"id":1024042,"date":"2024-12-30T14:10:14","date_gmt":"2024-12-30T06:10:14","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1024042.html"},"modified":"2024-12-30T14:10:16","modified_gmt":"2024-12-30T06:10:16","slug":"%e5%a6%82%e4%bd%95%e8%a1%a8%e7%a4%bapython%e5%88%97%e8%a1%a8%e4%b8%aa%e6%95%b0-2","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1024042.html","title":{"rendered":"\u5982\u4f55\u8868\u793apython\u5217\u8868\u4e2a\u6570"},"content":{"rendered":"

\"\u5982\u4f55\u8868\u793apython\u5217\u8868\u4e2a\u6570\"<\/p>\n

\u5982\u4f55\u8868\u793apython\u5217\u8868\u4e2a\u6570\uff0c\u53ef\u4ee5\u4f7f\u7528\u5185\u7f6e\u51fd\u6570len()\u3001\u904d\u5386\u5217\u8868\u8ba1\u6570\u3001\u4f7f\u7528\u5217\u8868\u63a8\u5bfc\u5f0f<\/strong><\/p>\n<\/p>\n

\u5728Python\u4e2d\uff0c\u8868\u793a\u5217\u8868\u7684\u4e2a\u6570\u4e3b\u8981\u6709\u51e0\u79cd\u65b9\u6cd5\u3002\u6700\u5e38\u89c1\u4e14\u6700\u7b80\u5355\u7684\u65b9\u6cd5\u662f\u4f7f\u7528\u5185\u7f6e\u51fd\u6570len()<\/code>\uff0c\u5b83\u80fd\u591f\u5feb\u901f\u8fd4\u56de\u5217\u8868\u7684\u957f\u5ea6\u3002\u6b64\u5916\uff0c\u8fd8\u53ef\u4ee5\u901a\u8fc7\u904d\u5386\u5217\u8868\u8ba1\u6570\u6216\u4f7f\u7528\u5217\u8868\u63a8\u5bfc\u5f0f\u6765\u5b9e\u73b0\u3002\u63a5\u4e0b\u6765\uff0c\u6211\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u6bcf\u4e00\u79cd\u65b9\u6cd5\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u4f7f\u7528\u5185\u7f6e\u51fd\u6570len()<\/h3>\n<\/p>\n

\u4f7f\u7528len()<\/code>\u51fd\u6570\u662f\u83b7\u53d6\u5217\u8868\u957f\u5ea6\u7684\u6700\u7b80\u5355\u3001\u6700\u76f4\u63a5\u7684\u65b9\u6cd5\u3002\u5b83\u7684\u4f7f\u7528\u65b9\u6cd5\u975e\u5e38\u7b80\u5355\uff0c\u53ea\u9700\u8981\u5c06\u5217\u8868\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u7ed9len()<\/code>\u51fd\u6570\uff0c\u5373\u53ef\u8fd4\u56de\u5217\u8868\u7684\u957f\u5ea6\u3002<\/p>\n<\/p>\n

my_list = [1, 2, 3, 4, 5]<\/p>\n
list_length = len(my_list)<\/p>\n
print(f"\u5217\u8868\u7684\u957f\u5ea6\u4e3a\uff1a{list_length}")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0clen(my_list)<\/code>\u4f1a\u8fd4\u56de\u5217\u8868my_list<\/code>\u7684\u957f\u5ea6\uff0c\u5e76\u5c06\u7ed3\u679c\u5b58\u50a8\u5728\u53d8\u91cflist_length<\/code>\u4e2d\u3002\u7136\u540e\uff0c\u4f7f\u7528print<\/code>\u51fd\u6570\u8f93\u51fa\u5217\u8868\u7684\u957f\u5ea6\u3002<\/p>\n<\/p>\n
\u4e8c\u3001\u904d\u5386\u5217\u8868\u8ba1\u6570<\/h3>\n<\/p>\n
\u904d\u5386\u5217\u8868\u8ba1\u6570\u662f\u53e6\u4e00\u79cd\u83b7\u53d6\u5217\u8868\u957f\u5ea6\u7684\u65b9\u6cd5\u3002\u901a\u8fc7\u904d\u5386\u5217\u8868\u4e2d\u7684\u6bcf\u4e00\u4e2a\u5143\u7d20\uff0c\u5e76\u5728\u6bcf\u6b21\u904d\u5386\u65f6\u589e\u52a0\u8ba1\u6570\u5668\u7684\u503c\uff0c\u6700\u7ec8\u8ba1\u6570\u5668\u7684\u503c\u5c31\u662f\u5217\u8868\u7684\u957f\u5ea6\u3002\u8fd9\u79cd\u65b9\u6cd5\u7684\u4f18\u70b9\u662f\u80fd\u591f\u517c\u5bb9\u4e0d\u652f\u6301len()<\/code>\u51fd\u6570\u7684\u73af\u5883\u3002<\/p>\n<\/p>\n
my_list = [1, 2, 3, 4, 5]<\/p>\n
count = 0<\/p>\n
for element in my_list:<\/p>\n
    count += 1<\/p>\n
print(f"\u5217\u8868\u7684\u957f\u5ea6\u4e3a\uff1a{count}")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cfor<\/code>\u5faa\u73af\u904d\u5386\u5217\u8868my_list<\/code>\u4e2d\u7684\u6bcf\u4e00\u4e2a\u5143\u7d20\uff0c\u6bcf\u904d\u5386\u4e00\u6b21\uff0c\u8ba1\u6570\u5668count<\/code>\u7684\u503c\u5c31\u589e\u52a01\u3002\u6700\u7ec8\uff0ccount<\/code>\u7684\u503c\u5c31\u662f\u5217\u8868\u7684\u957f\u5ea6\u3002<\/p>\n<\/p>\n
\u4e09\u3001\u4f7f\u7528\u5217\u8868\u63a8\u5bfc\u5f0f<\/h3>\n<\/p>\n
\u5217\u8868\u63a8\u5bfc\u5f0f\u662f\u4e00\u79cd\u7b80\u6d01\u7684Python\u8bed\u6cd5\uff0c\u7528\u4e8e\u521b\u5efa\u65b0\u7684\u5217\u8868\u6216\u6267\u884c\u67d0\u79cd\u64cd\u4f5c\u3002\u5728\u83b7\u53d6\u5217\u8868\u957f\u5ea6\u65f6\uff0c\u53ef\u4ee5\u7ed3\u5408sum()<\/code>\u51fd\u6570\u548c\u5217\u8868\u63a8\u5bfc\u5f0f\u6765\u5b9e\u73b0\u3002\u5177\u4f53\u505a\u6cd5\u662f\u4f7f\u7528sum(1 for _ in my_list)<\/code>\u6765\u8ba1\u7b97\u5217\u8868\u7684\u957f\u5ea6\u3002<\/p>\n<\/p>\n
my_list = [1, 2, 3, 4, 5]<\/p>\n
list_length = sum(1 for _ in my_list)<\/p>\n
print(f"\u5217\u8868\u7684\u957f\u5ea6\u4e3a\uff1a{list_length}")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0csum(1 for _ in my_list)<\/code>\u901a\u8fc7\u5217\u8868\u63a8\u5bfc\u5f0f\u904d\u5386my_list<\/code>\u4e2d\u7684\u6bcf\u4e00\u4e2a\u5143\u7d20\uff0c\u5e76\u5728\u6bcf\u6b21\u904d\u5386\u65f6\u751f\u6210\u4e00\u4e2a\u503c\u4e3a1\u7684\u5217\u8868\u3002\u6700\u540e\uff0csum()<\/code>\u51fd\u6570\u5c06\u8fd9\u4e9b1\u52a0\u8d77\u6765\uff0c\u5f97\u5230\u5217\u8868\u7684\u957f\u5ea6\u3002<\/p>\n<\/p>\n
\u56db\u3001\u4f7f\u7528\u9012\u5f52<\/h3>\n<\/p>\n
\u9012\u5f52\u662f\u4e00\u79cd\u51fd\u6570\u8c03\u7528\u81ea\u8eab\u7684\u65b9\u6cd5\uff0c\u4e5f\u53ef\u4ee5\u7528\u4e8e\u8ba1\u7b97\u5217\u8868\u7684\u957f\u5ea6\u3002\u9012\u5f52\u65b9\u6cd5\u7684\u57fa\u672c\u601d\u8def\u662f\u5c06\u5217\u8868\u5206\u89e3\u4e3a\u7b2c\u4e00\u4e2a\u5143\u7d20\u548c\u5269\u4f59\u7684\u90e8\u5206\uff0c\u8ba1\u7b97\u5269\u4f59\u90e8\u5206\u7684\u957f\u5ea6\uff0c\u5e76\u52a0\u4e0a1\u3002<\/p>\n<\/p>\n
def recursive_len(lst):<\/p>\n
    if not lst:<\/p>\n
        return 0<\/p>\n
    return 1 + recursive_len(lst[1:])<\/p>\n
my_list = [1, 2, 3, 4, 5]<\/p>\n
list_length = recursive_len(my_list)<\/p>\n
print(f"\u5217\u8868\u7684\u957f\u5ea6\u4e3a\uff1a{list_length}")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0crecursive_len<\/code>\u51fd\u6570\u901a\u8fc7\u9012\u5f52\u8c03\u7528\u81ea\u8eab\u6765\u8ba1\u7b97\u5217\u8868\u7684\u957f\u5ea6\u3002\u5982\u679c\u5217\u8868\u4e3a\u7a7a\uff0c\u5219\u8fd4\u56de0\uff1b\u5426\u5219\uff0c\u8fd4\u56de1\u52a0\u4e0a\u5269\u4f59\u90e8\u5206\u7684\u957f\u5ea6\u3002<\/p>\n<\/p>\n
\u4e94\u3001\u4f7f\u7528map\u51fd\u6570<\/h3>\n<\/p>\n
map()<\/code>\u51fd\u6570\u662fPython\u5185\u7f6e\u7684\u9ad8\u9636\u51fd\u6570\uff0c\u5b83\u53ef\u4ee5\u5bf9\u53ef\u8fed\u4ee3\u5bf9\u8c61\u4e2d\u7684\u6240\u6709\u5143\u7d20\u5e94\u7528\u6307\u5b9a\u7684\u51fd\u6570\u3002\u7ed3\u5408sum()<\/code>\u51fd\u6570\uff0cmap()<\/code>\u51fd\u6570\u4e5f\u53ef\u4ee5\u7528\u4e8e\u8ba1\u7b97\u5217\u8868\u7684\u957f\u5ea6\u3002<\/p>\n<\/p>\n
my_list = [1, 2, 3, 4, 5]<\/p>\n
list_length = sum(map(lambda x: 1, my_list))<\/p>\n
print(f"\u5217\u8868\u7684\u957f\u5ea6\u4e3a\uff1a{list_length}")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cmap(lambda x: 1, my_list)<\/code>\u4e3a\u5217\u8868my_list<\/code>\u4e2d\u7684\u6bcf\u4e00\u4e2a\u5143\u7d20\u5e94\u7528\u533f\u540d\u51fd\u6570lambda x: 1<\/code>\uff0c\u751f\u6210\u4e00\u4e2a\u503c\u4e3a1\u7684\u5217\u8868\u3002\u6700\u540e\uff0csum()<\/code>\u51fd\u6570\u5c06\u8fd9\u4e9b1\u52a0\u8d77\u6765\uff0c\u5f97\u5230\u5217\u8868\u7684\u957f\u5ea6\u3002<\/p>\n<\/p>\n
\u516d\u3001\u4f7f\u7528reduce\u51fd\u6570<\/h3>\n<\/p>\n
reduce()<\/code>\u51fd\u6570\u662ffunctools<\/code>\u6a21\u5757\u4e2d\u7684\u4e00\u4e2a\u9ad8\u9636\u51fd\u6570\uff0c\u7528\u4e8e\u5bf9\u53ef\u8fed\u4ee3\u5bf9\u8c61\u4e2d\u7684\u6240\u6709\u5143\u7d20\u8fdb\u884c\u7d2f\u79ef\u64cd\u4f5c\u3002\u7ed3\u5408operator.add<\/code>\u51fd\u6570\uff0creduce()<\/code>\u51fd\u6570\u4e5f\u53ef\u4ee5\u7528\u4e8e\u8ba1\u7b97\u5217\u8868\u7684\u957f\u5ea6\u3002<\/p>\n<\/p>\n
from functools import reduce<\/p>\n
import operator<\/p>\n
my_list = [1, 2, 3, 4, 5]<\/p>\n
list_length = reduce(operator.add, map(lambda x: 1, my_list))<\/p>\n
print(f"\u5217\u8868\u7684\u957f\u5ea6\u4e3a\uff1a{list_length}")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cmap(lambda x: 1, my_list)<\/code>\u4e3a\u5217\u8868my_list<\/code>\u4e2d\u7684\u6bcf\u4e00\u4e2a\u5143\u7d20\u5e94\u7528\u533f\u540d\u51fd\u6570lambda x: 1<\/code>\uff0c\u751f\u6210\u4e00\u4e2a\u503c\u4e3a1\u7684\u5217\u8868\u3002\u7136\u540e\uff0creduce(operator.add, ...)<\/code>\u51fd\u6570\u5c06\u8fd9\u4e9b1\u52a0\u8d77\u6765\uff0c\u5f97\u5230\u5217\u8868\u7684\u957f\u5ea6\u3002<\/p>\n<\/p>\n
\u4e03\u3001\u4f7f\u7528enumerate\u51fd\u6570<\/h3>\n<\/p>\n
enumerate()<\/code>\u51fd\u6570\u662fPython\u5185\u7f6e\u7684\u51fd\u6570\uff0c\u7528\u4e8e\u5c06\u53ef\u8fed\u4ee3\u5bf9\u8c61\u4e2d\u7684\u6bcf\u4e00\u4e2a\u5143\u7d20\u548c\u5176\u5bf9\u5e94\u7684\u7d22\u5f15\u503c\u4e00\u8d77\u8fd4\u56de\u3002\u901a\u8fc7\u904d\u5386enumerate()<\/code>\u51fd\u6570\u7684\u7ed3\u679c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5217\u8868\u7684\u957f\u5ea6\u3002<\/p>\n<\/p>\n
my_list = [1, 2, 3, 4, 5]<\/p>\n
count = 0<\/p>\n
for index, element in enumerate(my_list):<\/p>\n
    count = index + 1<\/p>\n
print(f"\u5217\u8868\u7684\u957f\u5ea6\u4e3a\uff1a{count}")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cenumerate(my_list)<\/code>\u8fd4\u56de\u4e00\u4e2a\u5305\u542b\u7d22\u5f15\u503c\u548c\u5143\u7d20\u7684\u8fed\u4ee3\u5668\u3002\u901a\u8fc7\u904d\u5386\u8fd9\u4e2a\u8fed\u4ee3\u5668\uff0c\u5e76\u5c06\u8ba1\u6570\u5668count<\/code>\u7684\u503c\u8bbe\u7f6e\u4e3a\u5f53\u524d\u7d22\u5f15\u503c\u52a01\uff0c\u6700\u7ec8count<\/code>\u7684\u503c\u5c31\u662f\u5217\u8868\u7684\u957f\u5ea6\u3002<\/p>\n<\/p>\n
\u516b\u3001\u4f7f\u7528numpy\u5e93<\/h3>\n<\/p>\n
numpy<\/code>\u662f\u4e00\u4e2a\u5f3a\u5927\u7684\u79d1\u5b66\u8ba1\u7b97\u5e93\uff0c\u63d0\u4f9b\u4e86\u8bb8\u591a\u5904\u7406\u6570\u7ec4\u548c\u77e9\u9635\u7684\u51fd\u6570\u3002\u4f7f\u7528numpy<\/code>\u5e93\u7684size<\/code>\u5c5e\u6027\uff0c\u53ef\u4ee5\u65b9\u4fbf\u5730\u83b7\u53d6\u5217\u8868\u7684\u957f\u5ea6\u3002<\/p>\n<\/p>\n
import numpy as np<\/p>\n
my_list = [1, 2, 3, 4, 5]<\/p>\n
array = np.array(my_list)<\/p>\n
list_length = array.size<\/p>\n
print(f"\u5217\u8868\u7684\u957f\u5ea6\u4e3a\uff1a{list_length}")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cnp.array(my_list)<\/code>\u5c06\u5217\u8868my_list<\/code>\u8f6c\u6362\u4e3anumpy<\/code>\u6570\u7ec4\uff0carray.size<\/code>\u8fd4\u56de\u6570\u7ec4\u7684\u5927\u5c0f\uff0c\u5373\u5217\u8868\u7684\u957f\u5ea6\u3002<\/p>\n<\/p>\n
\u4e5d\u3001\u4f7f\u7528pandas\u5e93<\/h3>\n<\/p>\n
pandas<\/code>\u662f\u4e00\u4e2a\u5f3a\u5927\u7684\u6570\u636e\u5206\u6790\u5e93\uff0c\u63d0\u4f9b\u4e86\u8bb8\u591a\u5904\u7406\u6570\u636e\u6846\u548c\u5e8f\u5217\u7684\u51fd\u6570\u3002\u4f7f\u7528pandas<\/code>\u5e93\u7684shape<\/code>\u5c5e\u6027\uff0c\u53ef\u4ee5\u65b9\u4fbf\u5730\u83b7\u53d6\u5217\u8868\u7684\u957f\u5ea6\u3002<\/p>\n<\/p>\n
import pandas as pd<\/p>\n
my_list = [1, 2, 3, 4, 5]<\/p>\n
series = pd.Series(my_list)<\/p>\n
list_length = series.shape[0]<\/p>\n
print(f"\u5217\u8868\u7684\u957f\u5ea6\u4e3a\uff1a{list_length}")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cpd.Series(my_list)<\/code>\u5c06\u5217\u8868my_list<\/code>\u8f6c\u6362\u4e3apandas<\/code>\u5e8f\u5217\uff0cseries.shape[0]<\/code>\u8fd4\u56de\u5e8f\u5217\u7684\u5927\u5c0f\uff0c\u5373\u5217\u8868\u7684\u957f\u5ea6\u3002<\/p>\n<\/p>\n
\u5341\u3001\u4f7f\u7528collections.Counter<\/h3>\n<\/p>\n
collections<\/code>\u6a21\u5757\u63d0\u4f9b\u4e86\u8bb8\u591a\u6709\u7528\u7684\u6570\u636e\u7ed3\u6784\uff0c\u5176\u4e2dCounter<\/code>\u662f\u4e00\u4e2a\u7528\u4e8e\u8ba1\u6570\u7684\u5bb9\u5668\u3002\u901a\u8fc7\u5c06\u5217\u8868\u4f20\u9012\u7ed9Counter<\/code>\uff0c\u53ef\u4ee5\u83b7\u53d6\u5217\u8868\u4e2d\u7684\u5143\u7d20\u53ca\u5176\u8ba1\u6570\u3002<\/p>\n<\/p>\n
from collections import Counter<\/p>\n
my_list = [1, 2, 3, 4, 5]<\/p>\n
counter = Counter(my_list)<\/p>\n
list_length = sum(counter.values())<\/p>\n
print(f"\u5217\u8868\u7684\u957f\u5ea6\u4e3a\uff1a{list_length}")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cCounter(my_list)<\/code>\u8fd4\u56de\u4e00\u4e2a\u5305\u542b\u5217\u8868my_list<\/code>\u4e2d\u6bcf\u4e2a\u5143\u7d20\u53ca\u5176\u8ba1\u6570\u7684Counter<\/code>\u5bf9\u8c61\u3002sum(counter.values())<\/code>\u5c06\u6240\u6709\u5143\u7d20\u7684\u8ba1\u6570\u52a0\u8d77\u6765\uff0c\u5f97\u5230\u5217\u8868\u7684\u957f\u5ea6\u3002<\/p>\n<\/p>\n
\u7ed3\u8bba<\/h3>\n<\/p>\n
\u901a\u8fc7\u4ee5\u4e0a\u51e0\u79cd\u65b9\u6cd5\uff0c\u6211\u4eec\u53ef\u4ee5\u5728Python\u4e2d\u8f7b\u677e\u83b7\u53d6\u5217\u8868\u7684\u957f\u5ea6\u3002\u6700\u5e38\u7528\u4e14\u6700\u7b80\u5355\u7684\u65b9\u6cd5\u662f\u4f7f\u7528\u5185\u7f6e\u51fd\u6570len()<\/code>\uff0c\u5b83\u80fd\u591f\u5feb\u901f\u8fd4\u56de\u5217\u8868\u7684\u957f\u5ea6\u3002\u6b64\u5916\uff0c\u8fd8\u53ef\u4ee5\u901a\u8fc7\u904d\u5386\u5217\u8868\u8ba1\u6570\u3001\u5217\u8868\u63a8\u5bfc\u5f0f\u3001\u9012\u5f52\u3001map<\/code>\u51fd\u6570\u3001reduce<\/code>\u51fd\u6570\u3001enumerate<\/code>\u51fd\u6570\u3001numpy<\/code>\u5e93\u3001pandas<\/code>\u5e93\u548ccollections.Counter<\/code>\u6765\u5b9e\u73b0\u3002\u6839\u636e\u5177\u4f53\u7684\u9700\u6c42\u548c\u73af\u5883\uff0c\u53ef\u4ee5\u9009\u62e9\u9002\u5408\u7684\u65b9\u6cd5\u6765\u83b7\u53d6\u5217\u8868\u7684\u957f\u5ea6\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
 \u5982\u4f55\u5728Python\u4e2d\u83b7\u53d6\u5217\u8868\u7684\u957f\u5ea6\uff1f<\/strong>
\u8981\u83b7\u53d6Python\u5217\u8868\u4e2d\u7684\u5143\u7d20\u4e2a\u6570\uff0c\u53ef\u4ee5\u4f7f\u7528\u5185\u7f6e\u7684len()<\/code>\u51fd\u6570\u3002\u8fd9\u4e2a\u51fd\u6570\u63a5\u53d7\u4e00\u4e2a\u5217\u8868\u4f5c\u4e3a\u53c2\u6570\uff0c\u5e76\u8fd4\u56de\u8be5\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
Python\u5217\u8868\u7684\u957f\u5ea6\u662f\u5426\u4f1a\u968f\u7740\u5143\u7d20\u7684\u6dfb\u52a0\u6216\u5220\u9664\u800c\u81ea\u52a8\u66f4\u65b0\uff1f<\/strong>
\u662f\u7684\uff0cPython\u5217\u8868\u7684\u957f\u5ea6\u662f\u52a8\u6001\u7684\u3002\u5f53\u4f60\u5411\u5217\u8868\u4e2d\u6dfb\u52a0\u5143\u7d20\u65f6\uff0c\u5217\u8868\u7684\u957f\u5ea6\u4f1a\u589e\u52a0\uff1b\u5f53\u4f60\u5220\u9664\u5143\u7d20\u65f6\uff0c\u5217\u8868\u7684\u957f\u5ea6\u4f1a\u51cf\u5c11\u3002\u4f7f\u7528len()<\/code>\u51fd\u6570\u968f\u65f6\u53ef\u4ee5\u83b7\u53d6\u5f53\u524d\u7684\u5217\u8868\u957f\u5ea6\u3002<\/p>\n
\u5982\u4f55\u5224\u65ad\u4e00\u4e2aPython\u5217\u8868\u662f\u5426\u4e3a\u7a7a\uff1f<\/strong>
\u8981\u68c0\u67e5\u4e00\u4e2a\u5217\u8868\u662f\u5426\u4e3a\u7a7a\uff0c\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528if not my_list:<\/code>\u8bed\u53e5\u3002\u5982\u679c\u5217\u8868\u4e3a\u7a7a\uff0c\u6761\u4ef6\u4e3a\u771f\uff1b\u5982\u679c\u5217\u8868\u4e2d\u6709\u5143\u7d20\uff0c\u5219\u6761\u4ef6\u4e3a\u5047\u3002\u8fd9\u6837\u53ef\u4ee5\u65b9\u4fbf\u5730\u5224\u65ad\u5217\u8868\u7684\u72b6\u6001\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5982\u4f55\u8868\u793apython\u5217\u8868\u4e2a\u6570\uff0c\u53ef\u4ee5\u4f7f\u7528\u5185\u7f6e\u51fd\u6570len()\u3001\u904d\u5386\u5217\u8868\u8ba1\u6570\u3001\u4f7f\u7528\u5217\u8868\u63a8\u5bfc\u5f0f \u5728Python\u4e2d\uff0c\u8868\u793a […]","protected":false},"author":3,"featured_media":1024047,"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\/1024042"}],"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=1024042"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1024042\/revisions"}],"predecessor-version":[{"id":1024048,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1024042\/revisions\/1024048"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/1024047"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=1024042"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=1024042"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=1024042"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}