{"id":1156072,"date":"2025-01-13T18:11:37","date_gmt":"2025-01-13T10:11:37","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1156072.html"},"modified":"2025-01-13T18:11:40","modified_gmt":"2025-01-13T10:11:40","slug":"%e5%ad%97%e5%85%b8%e5%a6%82%e4%bd%95%e5%ad%98%e5%82%a8%e5%80%bcpython","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/1156072.html","title":{"rendered":"\u5b57\u5178\u5982\u4f55\u5b58\u50a8\u503cpython"},"content":{"rendered":"

\"\u5b57\u5178\u5982\u4f55\u5b58\u50a8\u503cpython\"<\/p>\n

\u5b57\u5178\u5728Python\u4e2d\u901a\u8fc7\u952e\u503c\u5bf9\u5b58\u50a8\u503c\u3001\u53ef\u4ee5\u5b58\u50a8\u4efb\u610f\u7c7b\u578b\u7684\u503c\u3001\u652f\u6301\u52a8\u6001\u8c03\u6574\u5927\u5c0f\u3001\u4f7f\u7528\u54c8\u5e0c\u8868\u6765\u5b9e\u73b0\u5feb\u901f\u67e5\u627e\u3002<\/strong> <\/p>\n<\/p>\n

\u8be6\u7ec6\u6765\u8bf4\uff0cPython\u4e2d\u7684\u5b57\u5178\u662f\u4e00\u79cd\u6570\u636e\u7ed3\u6784\uff0c\u7528\u4e8e\u5b58\u50a8\u952e\u503c\u5bf9\u3002\u6bcf\u4e2a\u952e\u5fc5\u987b\u662f\u552f\u4e00\u7684\uff0c\u5e76\u4e14\u662f\u4e0d\u53ef\u53d8\u7684\u7c7b\u578b\uff0c\u5982\u5b57\u7b26\u4e32\u3001\u6574\u6570\u6216\u5143\u7ec4\u3002\u5b57\u5178\u7684\u503c\u53ef\u4ee5\u662f\u4efb\u610f\u7c7b\u578b\u7684\uff0c\u5305\u62ec\u5176\u4ed6\u5b57\u5178\u3002Python\u5b57\u5178\u4f7f\u7528\u54c8\u5e0c\u8868\u6765\u5b9e\u73b0\u952e\u503c\u5bf9\u7684\u5b58\u50a8\u548c\u5feb\u901f\u67e5\u627e\uff0c\u8fd9\u4f7f\u5f97\u5b57\u5178\u7684\u67e5\u627e\u3001\u63d2\u5165\u548c\u5220\u9664\u64cd\u4f5c\u90fd\u5177\u6709\u5e73\u5747O(1)\u7684\u65f6\u95f4\u590d\u6742\u5ea6\u3002\u5b57\u5178\u7684\u5927\u5c0f\u53ef\u4ee5\u52a8\u6001\u8c03\u6574\uff0c\u4ee5\u9002\u5e94\u5b58\u50a8\u7684\u952e\u503c\u5bf9\u7684\u6570\u91cf\u53d8\u5316\u3002<\/p>\n<\/p>\n

\u63a5\u4e0b\u6765\uff0c\u6211\u5c06\u8be6\u7ec6\u4ecb\u7ecdPython\u5b57\u5178\u7684\u5404\u4e2a\u65b9\u9762\uff0c\u5305\u62ec\u521b\u5efa\u5b57\u5178\u3001\u6dfb\u52a0\u548c\u5220\u9664\u5143\u7d20\u3001\u67e5\u627e\u5143\u7d20\u3001\u904d\u5386\u5b57\u5178\u4ee5\u53ca\u4e00\u4e9b\u9ad8\u7ea7\u7528\u6cd5\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u5b57\u5178\u7684\u57fa\u672c\u64cd\u4f5c<\/h2>\n<\/p>\n

1\u3001\u521b\u5efa\u5b57\u5178<\/h3>\n<\/p>\n

\u5b57\u5178\u53ef\u4ee5\u901a\u8fc7\u591a\u79cd\u65b9\u5f0f\u521b\u5efa\u3002\u6700\u5e38\u89c1\u7684\u65b9\u6cd5\u662f\u4f7f\u7528\u82b1\u62ec\u53f7 {}<\/code> \u6765\u5305\u56f4\u952e\u503c\u5bf9\uff1a<\/p>\n<\/p>\n

# \u521b\u5efa\u4e00\u4e2a\u7a7a\u5b57\u5178<\/p>\n
my_dict = {}<\/p>\n
\u521b\u5efa\u4e00\u4e2a\u5305\u542b\u952e\u503c\u5bf9\u7684\u5b57\u5178<\/strong><\/h2>\n
my_dict = {<\/p>\n
    "name": "Alice",<\/p>\n
    "age": 25,<\/p>\n
    "city": "New York"<\/p>\n
}<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e5f\u53ef\u4ee5\u4f7f\u7528 dict()<\/code> \u51fd\u6570\u6765\u521b\u5efa\u5b57\u5178\uff1a<\/p>\n<\/p>\n
# \u4f7f\u7528 dict() \u51fd\u6570\u521b\u5efa\u5b57\u5178<\/p>\n
my_dict = dict(name="Alice", age=25, city="New York")<\/p>\n
<\/code><\/pre>\n<\/p>\n
2\u3001\u6dfb\u52a0\u548c\u5220\u9664\u5143\u7d20<\/h3>\n<\/p>\n
\u5411\u5b57\u5178\u6dfb\u52a0\u5143\u7d20\u975e\u5e38\u7b80\u5355\uff0c\u53ea\u9700\u5c06\u952e\u503c\u5bf9\u8d4b\u503c\u7ed9\u5b57\u5178\u5373\u53ef\uff1a<\/p>\n<\/p>\n
# \u6dfb\u52a0\u65b0\u7684\u952e\u503c\u5bf9<\/p>\n
my_dict["emAI<\/a>l"] = "alice@example.com"<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5220\u9664\u5143\u7d20\u53ef\u4ee5\u4f7f\u7528 del<\/code> \u5173\u952e\u5b57\u6216 pop()<\/code> \u65b9\u6cd5\uff1a<\/p>\n<\/p>\n
# \u4f7f\u7528 del \u5173\u952e\u5b57\u5220\u9664\u5143\u7d20<\/p>\n
del my_dict["age"]<\/p>\n
\u4f7f\u7528 pop() \u65b9\u6cd5\u5220\u9664\u5143\u7d20\uff0c\u5e76\u8fd4\u56de\u88ab\u5220\u9664\u7684\u503c<\/strong><\/h2>\n
email = my_dict.pop("email")<\/p>\n
<\/code><\/pre>\n<\/p>\n
3\u3001\u67e5\u627e\u5143\u7d20<\/h3>\n<\/p>\n
\u67e5\u627e\u5143\u7d20\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528\u952e\u6765\u8bbf\u95ee\u5bf9\u5e94\u7684\u503c\uff1a<\/p>\n<\/p>\n
# \u67e5\u627e\u952e\u5bf9\u5e94\u7684\u503c<\/p>\n
name = my_dict["name"]<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e3a\u4e86\u907f\u514d\u952e\u4e0d\u5b58\u5728\u65f6\u629b\u51fa\u5f02\u5e38\uff0c\u53ef\u4ee5\u4f7f\u7528 get()<\/code> \u65b9\u6cd5\uff1a<\/p>\n<\/p>\n
# \u4f7f\u7528 get() \u65b9\u6cd5\u67e5\u627e\u952e\u5bf9\u5e94\u7684\u503c<\/p>\n
name = my_dict.get("name", "Unknown")<\/p>\n
<\/code><\/pre>\n<\/p>\n
4\u3001\u904d\u5386\u5b57\u5178<\/h3>\n<\/p>\n
\u5b57\u5178\u7684\u904d\u5386\u53ef\u4ee5\u901a\u8fc7 for<\/code> \u5faa\u73af\u6765\u5b9e\u73b0\u3002\u53ef\u4ee5\u904d\u5386\u5b57\u5178\u7684\u952e\u3001\u503c\u6216\u952e\u503c\u5bf9\uff1a<\/p>\n<\/p>\n
# \u904d\u5386\u952e<\/p>\n
for key in my_dict:<\/p>\n
    print(key)<\/p>\n
\u904d\u5386\u503c<\/strong><\/h2>\n
for value in my_dict.values():<\/p>\n
    print(value)<\/p>\n
\u904d\u5386\u952e\u503c\u5bf9<\/strong><\/h2>\n
for key, value in my_dict.items():<\/p>\n
    print(key, value)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e8c\u3001\u5b57\u5178\u7684\u9ad8\u7ea7\u7528\u6cd5<\/h2>\n<\/p>\n
1\u3001\u5b57\u5178\u63a8\u5bfc\u5f0f<\/h3>\n<\/p>\n
\u5b57\u5178\u63a8\u5bfc\u5f0f\u662f\u4e00\u79cd\u5feb\u901f\u521b\u5efa\u5b57\u5178\u7684\u65b9\u6cd5\uff0c\u5b83\u7c7b\u4f3c\u4e8e\u5217\u8868\u63a8\u5bfc\u5f0f\uff1a<\/p>\n<\/p>\n
# \u4f7f\u7528\u5b57\u5178\u63a8\u5bfc\u5f0f\u521b\u5efa\u5b57\u5178<\/p>\n
squares = {x: x*x for x in range(6)}<\/p>\n
<\/code><\/pre>\n<\/p>\n
2\u3001\u5b57\u5178\u5408\u5e76<\/h3>\n<\/p>\n
\u5728Python 3.9\u53ca\u4ee5\u4e0a\u7248\u672c\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528 |<\/code> \u8fd0\u7b97\u7b26\u6765\u5408\u5e76\u5b57\u5178\uff1a<\/p>\n<\/p>\n
dict1 = {"a": 1, "b": 2}<\/p>\n
dict2 = {"b": 3, "c": 4}<\/p>\n
\u4f7f\u7528 | \u8fd0\u7b97\u7b26\u5408\u5e76\u5b57\u5178<\/strong><\/h2>\n
merged_dict = dict1 | dict2<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5bf9\u4e8e\u8f83\u4f4e\u7248\u672c\u7684Python\uff0c\u53ef\u4ee5\u4f7f\u7528 update()<\/code> \u65b9\u6cd5\uff1a<\/p>\n<\/p>\n
dict1.update(dict2)<\/p>\n
<\/code><\/pre>\n<\/p>\n
3\u3001\u5b57\u5178\u7684\u6392\u5e8f<\/h3>\n<\/p>\n
\u5b57\u5178\u672c\u8eab\u662f\u65e0\u5e8f\u7684\uff0c\u4f46\u53ef\u4ee5\u6839\u636e\u952e\u6216\u503c\u5bf9\u5b57\u5178\u8fdb\u884c\u6392\u5e8f\u3002\u53ef\u4ee5\u4f7f\u7528 sorted()<\/code> \u51fd\u6570\u5bf9\u5b57\u5178\u7684\u952e\u6216\u503c\u8fdb\u884c\u6392\u5e8f\uff1a<\/p>\n<\/p>\n
# \u6839\u636e\u952e\u6392\u5e8f<\/p>\n
sorted_by_key = dict(sorted(my_dict.items(), key=lambda item: item[0]))<\/p>\n
\u6839\u636e\u503c\u6392\u5e8f<\/strong><\/h2>\n
sorted_by_value = dict(sorted(my_dict.items(), key=lambda item: item[1]))<\/p>\n
<\/code><\/pre>\n<\/p>\n
4\u3001\u5b57\u5178\u7684\u9ed8\u8ba4\u503c<\/h3>\n<\/p>\n
defaultdict<\/code> \u662f collections<\/code> \u6a21\u5757\u4e2d\u7684\u4e00\u4e2a\u7c7b\uff0c\u5b83\u5141\u8bb8\u4e3a\u5b57\u5178\u4e2d\u7684\u6bcf\u4e2a\u952e\u63d0\u4f9b\u9ed8\u8ba4\u503c\uff1a<\/p>\n<\/p>\n
from collections import defaultdict<\/p>\n
\u521b\u5efa\u4e00\u4e2a defaultdict\uff0c\u9ed8\u8ba4\u503c\u4e3a 0<\/strong><\/h2>\n
dd = defaultdict(int)<\/p>\n
\u8bbf\u95ee\u4e0d\u5b58\u5728\u7684\u952e\uff0c\u8fd4\u56de\u9ed8\u8ba4\u503c 0<\/strong><\/h2>\n
print(dd["missing_key"])  # \u8f93\u51fa 0<\/p>\n
<\/code><\/pre>\n<\/p>\n
5\u3001\u5b57\u5178\u7684\u5d4c\u5957<\/h3>\n<\/p>\n
\u5b57\u5178\u53ef\u4ee5\u5d4c\u5957\uff0c\u5373\u5b57\u5178\u7684\u503c\u4e5f\u53ef\u4ee5\u662f\u53e6\u4e00\u4e2a\u5b57\u5178\uff1a<\/p>\n<\/p>\n
nested_dict = {<\/p>\n
    "person": {<\/p>\n
        "name": "Alice",<\/p>\n
        "age": 25<\/p>\n
    },<\/p>\n
    "address": {<\/p>\n
        "city": "New York",<\/p>\n
        "zip": "10001"<\/p>\n
    }<\/p>\n
}<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8bbf\u95ee\u5d4c\u5957\u5b57\u5178\u7684\u5143\u7d20\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528\u591a\u7ea7\u952e\uff1a<\/p>\n<\/p>\n
city = nested_dict["address"]["city"]<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e09\u3001\u5b57\u5178\u7684\u6027\u80fd\u4f18\u5316<\/h2>\n<\/p>\n
1\u3001\u54c8\u5e0c\u8868\u7684\u5de5\u4f5c\u539f\u7406<\/h3>\n<\/p>\n
\u5b57\u5178\u4f7f\u7528\u54c8\u5e0c\u8868\u6765\u5b58\u50a8\u952e\u503c\u5bf9\u3002\u54c8\u5e0c\u8868\u7684\u57fa\u672c\u601d\u60f3\u662f\u5c06\u952e\u901a\u8fc7\u54c8\u5e0c\u51fd\u6570\u8f6c\u6362\u4e3a\u4e00\u4e2a\u54c8\u5e0c\u503c\uff0c\u7136\u540e\u5c06\u54c8\u5e0c\u503c\u6620\u5c04\u5230\u4e00\u4e2a\u6570\u7ec4\u7684\u4f4d\u7f6e\u3002\u8fd9\u79cd\u65b9\u5f0f\u4f7f\u5f97\u67e5\u627e\u3001\u63d2\u5165\u548c\u5220\u9664\u64cd\u4f5c\u7684\u5e73\u5747\u65f6\u95f4\u590d\u6742\u5ea6\u4e3aO(1)\u3002<\/p>\n<\/p>\n
2\u3001\u907f\u514d\u54c8\u5e0c\u51b2\u7a81<\/h3>\n<\/p>\n
\u54c8\u5e0c\u51b2\u7a81\u662f\u6307\u4e24\u4e2a\u4e0d\u540c\u7684\u952e\u7ecf\u8fc7\u54c8\u5e0c\u51fd\u6570\u8ba1\u7b97\u540e\u5f97\u5230\u76f8\u540c\u7684\u54c8\u5e0c\u503c\u3002\u4e3a\u4e86\u907f\u514d\u54c8\u5e0c\u51b2\u7a81\uff0c\u53ef\u4ee5\u9009\u62e9\u4e00\u4e2a\u597d\u7684\u54c8\u5e0c\u51fd\u6570\uff0c\u5e76\u4e14\u5728\u53d1\u751f\u51b2\u7a81\u65f6\u4f7f\u7528\u94fe\u5730\u5740\u6cd5\u6216\u5f00\u653e\u5730\u5740\u6cd5\u7b49\u51b2\u7a81\u89e3\u51b3\u7b56\u7565\u3002<\/p>\n<\/p>\n
3\u3001\u52a8\u6001\u8c03\u6574\u5927\u5c0f<\/h3>\n<\/p>\n
Python\u5b57\u5178\u4f1a\u52a8\u6001\u8c03\u6574\u5927\u5c0f\u4ee5\u9002\u5e94\u5b58\u50a8\u7684\u952e\u503c\u5bf9\u7684\u6570\u91cf\u53d8\u5316\u3002\u5f53\u5b57\u5178\u7684\u8d1f\u8f7d\u56e0\u5b50\uff08\u5df2\u4f7f\u7528\u7684\u54c8\u5e0c\u8868\u69fd\u4f4d\u6570\u4e0e\u603b\u69fd\u4f4d\u6570\u7684\u6bd4\u503c\uff09\u8fbe\u5230\u4e00\u5b9a\u9608\u503c\u65f6\uff0c\u5b57\u5178\u4f1a\u81ea\u52a8\u6269\u5c55\u54c8\u5e0c\u8868\u7684\u5927\u5c0f\uff0c\u4ee5\u51cf\u5c11\u54c8\u5e0c\u51b2\u7a81\uff0c\u63d0\u9ad8\u67e5\u627e\u6548\u7387\u3002<\/p>\n<\/p>\n
\u56db\u3001\u5b57\u5178\u7684\u5e38\u89c1\u5e94\u7528\u573a\u666f<\/h2>\n<\/p>\n
1\u3001\u8ba1\u6570\u5668<\/h3>\n<\/p>\n
\u5b57\u5178\u53ef\u4ee5\u7528\u4e8e\u5b9e\u73b0\u8ba1\u6570\u5668\uff0c\u7edf\u8ba1\u5143\u7d20\u51fa\u73b0\u7684\u6b21\u6570\uff1a<\/p>\n<\/p>\n
from collections import Counter<\/p>\n
\u4f7f\u7528 Counter \u7edf\u8ba1\u5b57\u7b26\u51fa\u73b0\u7684\u6b21\u6570<\/strong><\/h2>\n
counter = Counter("hello world")<\/p>\n
<\/code><\/pre>\n<\/p>\n
2\u3001\u5206\u7ec4<\/h3>\n<\/p>\n
\u5b57\u5178\u53ef\u4ee5\u7528\u4e8e\u5bf9\u6570\u636e\u8fdb\u884c\u5206\u7ec4\uff1a<\/p>\n<\/p>\n
data = [("Alice", 25), ("Bob", 30), ("Alice", 27), ("Bob", 32)]<\/p>\n
\u4f7f\u7528 defaultdict \u5bf9\u6570\u636e\u8fdb\u884c\u5206\u7ec4<\/strong><\/h2>\n
from collections import defaultdict<\/p>\n
grouped_data = defaultdict(list)<\/p>\n
for name, age in data:<\/p>\n
    grouped_data[name].append(age)<\/p>\n
<\/code><\/pre>\n<\/p>\n
3\u3001\u7f13\u5b58<\/h3>\n<\/p>\n
\u5b57\u5178\u53ef\u4ee5\u7528\u4e8e\u5b9e\u73b0\u7b80\u5355\u7684\u7f13\u5b58\u673a\u5236\uff1a<\/p>\n<\/p>\n
cache = {}<\/p>\n
def get_data(key):<\/p>\n
    if key in cache:<\/p>\n
        return cache[key]<\/p>\n
    else:<\/p>\n
        value = expensive_computation(key)<\/p>\n
        cache[key] = value<\/p>\n
        return value<\/p>\n
<\/code><\/pre>\n<\/p>\n
4\u3001\u6620\u5c04<\/h3>\n<\/p>\n
\u5b57\u5178\u53ef\u4ee5\u7528\u4e8e\u5b9e\u73b0\u6620\u5c04\u5173\u7cfb\uff1a<\/p>\n<\/p>\n
# \u521b\u5efa\u4e00\u4e2a\u6620\u5c04\u5173\u7cfb<\/p>\n
mapping = {<\/p>\n
    "a": 1,<\/p>\n
    "b": 2,<\/p>\n
    "c": 3<\/p>\n
}<\/p>\n
\u4f7f\u7528\u6620\u5c04\u5173\u7cfb\u5c06\u5b57\u7b26\u8f6c\u6362\u4e3a\u6570\u5b57<\/strong><\/h2>\n
numbers = [mapping[char] for char in "abc"]<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e94\u3001\u5b57\u5178\u7684\u6ce8\u610f\u4e8b\u9879<\/h2>\n<\/p>\n
1\u3001\u952e\u7684\u4e0d\u53ef\u53d8\u6027<\/h3>\n<\/p>\n
\u5b57\u5178\u7684\u952e\u5fc5\u987b\u662f\u4e0d\u53ef\u53d8\u7c7b\u578b\uff0c\u5982\u5b57\u7b26\u4e32\u3001\u6574\u6570\u6216\u5143\u7ec4\u3002\u53ef\u53d8\u7c7b\u578b\uff08\u5982\u5217\u8868\uff09\u4e0d\u80fd\u4f5c\u4e3a\u5b57\u5178\u7684\u952e\uff0c\u56e0\u4e3a\u5b83\u4eec\u7684\u54c8\u5e0c\u503c\u53ef\u80fd\u4f1a\u6539\u53d8\u3002<\/p>\n<\/p>\n
2\u3001\u952e\u7684\u552f\u4e00\u6027<\/h3>\n<\/p>\n
\u5b57\u5178\u4e2d\u7684\u952e\u5fc5\u987b\u662f\u552f\u4e00\u7684\u3002\u5982\u679c\u5411\u5b57\u5178\u4e2d\u6dfb\u52a0\u4e00\u4e2a\u5df2\u5b58\u5728\u7684\u952e\uff0c\u65b0\u7684\u503c\u4f1a\u8986\u76d6\u65e7\u7684\u503c\u3002<\/p>\n<\/p>\n
3\u3001\u5b57\u5178\u7684\u5927\u5c0f\u9650\u5236<\/h3>\n<\/p>\n
\u5c3d\u7ba1\u5b57\u5178\u7684\u5927\u5c0f\u53ef\u4ee5\u52a8\u6001\u8c03\u6574\uff0c\u4f46\u4ecd\u7136\u53d7\u9650\u4e8e\u5185\u5b58\u7684\u5927\u5c0f\u3002\u5728\u5904\u7406\u975e\u5e38\u5927\u7684\u6570\u636e\u96c6\u65f6\uff0c\u53ef\u80fd\u9700\u8981\u8003\u8651\u5176\u4ed6\u6570\u636e\u7ed3\u6784\u6216\u6570\u636e\u5e93\u7cfb\u7edf\u3002<\/p>\n<\/p>\n
4\u3001\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u590d\u5236<\/h3>\n<\/p>\n
\u5728\u5904\u7406\u5927\u6570\u636e\u96c6\u65f6\uff0c\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u5b57\u5178\u590d\u5236\u64cd\u4f5c\uff0c\u4ee5\u8282\u7701\u5185\u5b58\u548c\u63d0\u9ad8\u6027\u80fd\u3002<\/p>\n<\/p>\n
5\u3001\u4f7f\u7528\u5408\u9002\u7684\u6570\u636e\u7ed3\u6784<\/h3>\n<\/p>\n
\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u5176\u4ed6\u6570\u636e\u7ed3\u6784\uff08\u5982\u5217\u8868\u3001\u96c6\u5408\u6216\u5143\u7ec4\uff09\u53ef\u80fd\u6bd4\u5b57\u5178\u66f4\u9002\u5408\u3002\u4f8b\u5982\uff0c\u5982\u679c\u53ea\u9700\u8981\u5b58\u50a8\u4e00\u7ec4\u552f\u4e00\u7684\u5143\u7d20\uff0c\u53ef\u4ee5\u4f7f\u7528\u96c6\u5408\uff1b\u5982\u679c\u9700\u8981\u4fdd\u6301\u5143\u7d20\u7684\u987a\u5e8f\uff0c\u53ef\u4ee5\u4f7f\u7528\u5217\u8868\u6216\u5143\u7ec4\u3002<\/p>\n<\/p>\n
\u603b\u7ed3\u8d77\u6765\uff0cPython\u4e2d\u7684\u5b57\u5178\u662f\u4e00\u79cd\u975e\u5e38\u5f3a\u5927\u7684\u6570\u636e\u7ed3\u6784\uff0c\u5177\u6709\u5feb\u901f\u67e5\u627e\u3001\u63d2\u5165\u548c\u5220\u9664\u64cd\u4f5c\u7684\u4f18\u52bf\u3002\u901a\u8fc7\u7406\u89e3\u5b57\u5178\u7684\u5de5\u4f5c\u539f\u7406\u548c\u5e38\u89c1\u5e94\u7528\u573a\u666f\uff0c\u53ef\u4ee5\u66f4\u9ad8\u6548\u5730\u5904\u7406\u5404\u79cd\u6570\u636e\u5904\u7406\u4efb\u52a1\u3002\u5e0c\u671b\u672c\u6587\u80fd\u5e2e\u52a9\u4f60\u66f4\u597d\u5730\u638c\u63e1Python\u5b57\u5178\u7684\u4f7f\u7528\u6280\u5de7\u548c\u6ce8\u610f\u4e8b\u9879\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
 \u5b57\u5178\u5728Python\u4e2d\u662f\u5982\u4f55\u7ec4\u7ec7\u548c\u5b58\u50a8\u6570\u636e\u7684\uff1f<\/strong>
\u5b57\u5178\u5728Python\u4e2d\u4ee5\u952e\u503c\u5bf9\u7684\u5f62\u5f0f\u5b58\u50a8\u6570\u636e\u3002\u6bcf\u4e2a\u952e\uff08key\uff09\u90fd\u662f\u552f\u4e00\u7684\uff0c\u800c\u6bcf\u4e2a\u952e\u5bf9\u5e94\u7684\u503c\uff08value\uff09\u53ef\u4ee5\u662f\u4efb\u4f55\u6570\u636e\u7c7b\u578b\uff0c\u5305\u62ec\u5217\u8868\u3001\u5143\u7ec4\u3001\u751a\u81f3\u5176\u4ed6\u5b57\u5178\u3002\u5b57\u5178\u7684\u5e95\u5c42\u5b9e\u73b0\u4f7f\u5f97\u67e5\u627e\u3001\u63d2\u5165\u548c\u5220\u9664\u64cd\u4f5c\u90fd\u975e\u5e38\u9ad8\u6548\uff0c\u901a\u5e38\u65f6\u95f4\u590d\u6742\u5ea6\u4e3aO(1)\u3002<\/p>\n
\u5728Python\u5b57\u5178\u4e2d\u5982\u4f55\u6dfb\u52a0\u6216\u66f4\u65b0\u503c\uff1f<\/strong>
\u8981\u5728\u5b57\u5178\u4e2d\u6dfb\u52a0\u65b0\u503c\uff0c\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528\u952e\u8d4b\u503c\uff0c\u4f8b\u5982my_dict['new_key'] = 'new_value'<\/code>\u3002\u5982\u679c\u8be5\u952e\u5df2\u7ecf\u5b58\u5728\uff0c\u5219\u4f1a\u66f4\u65b0\u76f8\u5e94\u7684\u503c\u3002\u4f7f\u7528update()<\/code>\u65b9\u6cd5\u4e5f\u53ef\u4ee5\u6279\u91cf\u6dfb\u52a0\u6216\u66f4\u65b0\u591a\u4e2a\u952e\u503c\u5bf9\uff0c\u4f8b\u5982my_dict.update({'key1': 'value1', 'key2': 'value2'})<\/code>\u3002<\/p>\n
\u5982\u4f55\u4ecePython\u5b57\u5178\u4e2d\u5220\u9664\u7279\u5b9a\u7684\u952e\u503c\u5bf9\uff1f<\/strong>
\u53ef\u4ee5\u4f7f\u7528del<\/code>\u8bed\u53e5\u6216pop()<\/code>\u65b9\u6cd5\u6765\u5220\u9664\u5b57\u5178\u4e2d\u7684\u952e\u503c\u5bf9\u3002\u4f7f\u7528del my_dict['key']<\/code>\u53ef\u4ee5\u5220\u9664\u6307\u5b9a\u7684\u952e\u53ca\u5176\u5bf9\u5e94\u7684\u503c\u3002\u800c\u4f7f\u7528value = my_dict.pop('key')<\/code>\u5219\u4e0d\u4ec5\u5220\u9664\u4e86\u952e\u503c\u5bf9\uff0c\u8fd8\u8fd4\u56de\u4e86\u88ab\u5220\u9664\u7684\u503c\uff0c\u8fd9\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\u975e\u5e38\u6709\u7528\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5b57\u5178\u5728Python\u4e2d\u901a\u8fc7\u952e\u503c\u5bf9\u5b58\u50a8\u503c\u3001\u53ef\u4ee5\u5b58\u50a8\u4efb\u610f\u7c7b\u578b\u7684\u503c\u3001\u652f\u6301\u52a8\u6001\u8c03\u6574\u5927\u5c0f\u3001\u4f7f\u7528\u54c8\u5e0c\u8868\u6765\u5b9e\u73b0\u5feb\u901f\u67e5\u627e\u3002 \u8be6\u7ec6 […]","protected":false},"author":3,"featured_media":1156088,"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\/1156072"}],"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=1156072"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1156072\/revisions"}],"predecessor-version":[{"id":1156091,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1156072\/revisions\/1156091"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/1156088"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=1156072"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=1156072"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=1156072"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}