{"id":968768,"date":"2024-12-27T05:10:03","date_gmt":"2024-12-26T21:10:03","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/968768.html"},"modified":"2024-12-27T05:10:04","modified_gmt":"2024-12-26T21:10:04","slug":"python%e5%a6%82%e4%bd%95%e8%bd%ac%e6%8d%a2%e4%b8%babytes","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/968768.html","title":{"rendered":"python\u5982\u4f55\u8f6c\u6362\u4e3abytes"},"content":{"rendered":"

\"python\u5982\u4f55\u8f6c\u6362\u4e3abytes\"<\/p>\n

Python\u4e2d\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528encode()<\/code>\u65b9\u6cd5\u3001bytes()<\/code>\u51fd\u6570\u3001struct<\/code>\u6a21\u5757\u3001pickle<\/code>\u6a21\u5757\u548cbytearray()<\/code>\u51fd\u6570\u5c06\u4e0d\u540c\u7c7b\u578b\u7684\u6570\u636e\u8f6c\u6362\u4e3a\u5b57\u8282\u5bf9\u8c61\uff08bytes\uff09\u3002\u8fd9\u4e9b\u65b9\u6cd5\u9002\u7528\u4e8e\u5b57\u7b26\u4e32\u3001\u6574\u6570\u3001\u5e8f\u5217\u5316\u5bf9\u8c61\u7b49\u4e0d\u540c\u7c7b\u578b\u7684\u6570\u636e\u3002<\/strong>\u5176\u4e2d\uff0cencode()<\/code>\u65b9\u6cd5\u5e38\u7528\u4e8e\u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u5b57\u8282\u5bf9\u8c61\uff0cbytes()<\/code>\u51fd\u6570\u53ef\u4ee5\u5c06\u6574\u6570\u548c\u5176\u4ed6\u53ef\u8fed\u4ee3\u5bf9\u8c61\u8f6c\u6362\u4e3a\u5b57\u8282\u5bf9\u8c61\u3002\u63a5\u4e0b\u6765\uff0c\u6211\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u5176\u4e2d\u7684\u4e00\u79cd\u65b9\u6cd5\uff0cencode()<\/code>\u65b9\u6cd5\u3002<\/p>\n<\/p>\n

encode()<\/code>\u65b9\u6cd5\u662f\u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u5b57\u8282\u5bf9\u8c61\u6700\u76f4\u63a5\u7684\u65b9\u6cd5\u4e4b\u4e00\u3002Python\u4e2d\u7684\u5b57\u7b26\u4e32\u662fUnicode\u5b57\u7b26\u4e32\uff0c\u4e3a\u4e86\u8fdb\u884c\u7f51\u7edc\u4f20\u8f93\u6216\u4fdd\u5b58\u5230\u6587\u4ef6\u4e2d\uff0c\u901a\u5e38\u9700\u8981\u5c06\u5176\u8f6c\u6362\u4e3a\u5b57\u8282\u5bf9\u8c61\u3002\u4f7f\u7528encode()<\/code>\u65b9\u6cd5\u65f6\uff0c\u53ef\u4ee5\u6307\u5b9a\u7f16\u7801\u683c\u5f0f\uff0c\u5982UTF-8\u3001ASCII\u7b49\u3002UTF-8\u662f\u4e00\u79cd\u5e38\u7528\u7684\u7f16\u7801\u683c\u5f0f\uff0c\u517c\u5bb9\u6027\u597d\u4e14\u80fd\u8868\u793a\u51e0\u4e4e\u6240\u6709\u7684\u5b57\u7b26\u96c6\u3002<\/p>\n<\/p>\n

# \u793a\u4f8b\u4ee3\u7801\uff1a\u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u5b57\u8282\u5bf9\u8c61<\/p>\n
string_data = "Hello, World!"<\/p>\n
bytes_data = string_data.encode('utf-8')<\/p>\n
print(bytes_data)  # \u8f93\u51fa\uff1ab'Hello, World!'<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e0a\u8ff0\u4ee3\u7801\u4e2d\uff0cencode('utf-8')<\/code>\u65b9\u6cd5\u5c06\u5b57\u7b26\u4e32"Hello, World!"<\/code>\u8f6c\u6362\u4e3a\u5b57\u8282\u5bf9\u8c61b'Hello, World!'<\/code>\u3002\u5982\u679c\u4e0d\u6307\u5b9a\u7f16\u7801\u683c\u5f0f\uff0c\u9ed8\u8ba4\u4f7f\u7528UTF-8\u7f16\u7801\u3002<\/p>\n<\/p>\n
\n
\u4e00\u3001\u4f7f\u7528 encode()<\/code> \u65b9\u6cd5<\/h2>\n<\/p>\n
encode()<\/code>\u65b9\u6cd5\u662fPython\u4e2d\u7528\u4e8e\u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u5b57\u8282\u5bf9\u8c61\u7684\u5e38\u7528\u65b9\u6cd5\u3002\u6bcf\u4e2a\u5b57\u7b26\u4e32\u5bf9\u8c61\u90fd\u5305\u542b\u6b64\u65b9\u6cd5\uff0c\u53ef\u4ee5\u6839\u636e\u9700\u8981\u9009\u62e9\u5408\u9002\u7684\u7f16\u7801\u65b9\u5f0f\u3002\u5e38\u7528\u7684\u7f16\u7801\u65b9\u5f0f\u5305\u62ecUTF-8\u3001ASCII\u3001Latin-1\u7b49\u3002<\/p>\n<\/p>\n
\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u5b57\u8282\u5bf9\u8c61<\/h3>\n<\/p>\n
\u5728Python\u4e2d\uff0c\u5b57\u7b26\u4e32\u662f\u4ee5Unicode\u8868\u793a\u7684\u5b57\u7b26\u5e8f\u5217\uff0c\u800c\u5b57\u8282\u5bf9\u8c61\u662f\u4ee5\u5b57\u8282\u4e3a\u5355\u4f4d\u7684\u5e8f\u5217\u3002\u56e0\u6b64\uff0c\u9700\u8981\u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u5b57\u8282\u5bf9\u8c61\u65f6\uff0c\u901a\u5e38\u4f7f\u7528encode()<\/code>\u65b9\u6cd5\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u4f8b\u5b50\uff1a<\/p>\n<\/p>\n
# \u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u5b57\u8282\u5bf9\u8c61<\/p>\n
string = "Hello, World!"<\/p>\n
bytes_obj = string.encode('utf-8')<\/p>\n
print(bytes_obj)  # \u8f93\u51fa\uff1ab'Hello, World!'<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u6b64\u793a\u4f8b\u4e2d\uff0cencode('utf-8')<\/code>\u65b9\u6cd5\u5c06\u5b57\u7b26\u4e32string<\/code>\u8f6c\u6362\u4e3aUTF-8\u7f16\u7801\u7684\u5b57\u8282\u5bf9\u8c61bytes_obj<\/code>\u3002UTF-8\u662f\u6700\u5e38\u7528\u7684\u7f16\u7801\u65b9\u5f0f\u4e4b\u4e00\uff0c\u80fd\u591f\u8868\u793a\u51e0\u4e4e\u6240\u6709\u7684\u5b57\u7b26\u96c6\u3002<\/p>\n<\/p>\n
\u4e0d\u540c\u7f16\u7801\u65b9\u5f0f\u7684\u4f7f\u7528<\/h3>\n<\/p>\n
Python\u652f\u6301\u591a\u79cd\u7f16\u7801\u65b9\u5f0f\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u6839\u636e\u9700\u8981\u9009\u62e9\u5408\u9002\u7684\u7f16\u7801\u65b9\u5f0f\u3002\u4e0d\u540c\u7f16\u7801\u65b9\u5f0f\u4e4b\u95f4\u7684\u5dee\u5f02\u5728\u4e8e\u5b83\u4eec\u8868\u793a\u5b57\u7b26\u7684\u5b57\u8282\u6570\u548c\u5b57\u7b26\u96c6\u7684\u8986\u76d6\u8303\u56f4\u3002\u4f8b\u5982\uff0cASCII\u7f16\u7801\u53ea\u80fd\u8868\u793a128\u4e2a\u5b57\u7b26\uff0c\u800cUTF-8\u7f16\u7801\u53ef\u4ee5\u8868\u793a\u51e0\u4e4e\u6240\u6709\u7684\u5b57\u7b26\u96c6\u3002<\/p>\n<\/p>\n
# \u4f7f\u7528\u4e0d\u540c\u7684\u7f16\u7801\u65b9\u5f0f<\/p>\n
string = "Hello, World!"<\/p>\n
utf8_bytes = string.encode('utf-8')<\/p>\n
ascii_bytes = string.encode('ascii')<\/p>\n
latin1_bytes = string.encode('latin-1')<\/p>\n
print(utf8_bytes)  # \u8f93\u51fa\uff1ab'Hello, World!'<\/p>\n
print(ascii_bytes)  # \u8f93\u51fa\uff1ab'Hello, World!'<\/p>\n
print(latin1_bytes)  # \u8f93\u51fa\uff1ab'Hello, World!'<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u6b64\u793a\u4f8b\u4e2d\uff0c\u5b57\u7b26\u4e32string<\/code>\u88ab\u5206\u522b\u8f6c\u6362\u4e3aUTF-8\u3001ASCII\u548cLatin-1\u7f16\u7801\u7684\u5b57\u8282\u5bf9\u8c61\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5982\u679c\u5b57\u7b26\u4e32\u5305\u542b\u975eASCII\u5b57\u7b26\uff0c\u800c\u9009\u62e9\u7684\u7f16\u7801\u65b9\u5f0f\u4e0d\u652f\u6301\u8fd9\u4e9b\u5b57\u7b26\uff0c\u5219\u4f1a\u5f15\u53d1UnicodeEncodeError<\/code>\u3002<\/p>\n<\/p>\n
\u4e8c\u3001\u4f7f\u7528 bytes()<\/code> \u51fd\u6570<\/h2>\n<\/p>\n
bytes()<\/code>\u51fd\u6570\u662fPython\u4e2d\u7528\u4e8e\u521b\u5efa\u5b57\u8282\u5bf9\u8c61\u7684\u5185\u7f6e\u51fd\u6570\u3002\u5b83\u53ef\u4ee5\u4ece\u6574\u6570\u3001\u53ef\u8fed\u4ee3\u5bf9\u8c61\uff08\u5982\u5217\u8868\u3001\u5143\u7ec4\uff09\u6216\u5b57\u7b26\u4e32\uff08\u9700\u8981\u6307\u5b9a\u7f16\u7801\uff09\u521b\u5efa\u5b57\u8282\u5bf9\u8c61\u3002<\/p>\n<\/p>\n
\u4ece\u6574\u6570\u521b\u5efa\u5b57\u8282\u5bf9\u8c61<\/h3>\n<\/p>\n
\u5f53\u4f7f\u7528bytes()<\/code>\u51fd\u6570\u4ece\u6574\u6570\u521b\u5efa\u5b57\u8282\u5bf9\u8c61\u65f6\uff0c\u6574\u6570\u8868\u793a\u5b57\u8282\u5bf9\u8c61\u7684\u957f\u5ea6\uff0c\u5b57\u8282\u5bf9\u8c61\u4e2d\u7684\u6bcf\u4e2a\u5b57\u8282\u90fd\u88ab\u521d\u59cb\u5316\u4e3a\u96f6\u3002<\/p>\n<\/p>\n
# \u4ece\u6574\u6570\u521b\u5efa\u5b57\u8282\u5bf9\u8c61<\/p>\n
length = 5<\/p>\n
bytes_obj = bytes(length)<\/p>\n
print(bytes_obj)  # \u8f93\u51fa\uff1ab'\\x00\\x00\\x00\\x00\\x00'<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u6b64\u793a\u4f8b\u4e2d\uff0cbytes(length)<\/code>\u521b\u5efa\u4e00\u4e2a\u957f\u5ea6\u4e3a5\u7684\u5b57\u8282\u5bf9\u8c61bytes_obj<\/code>\uff0c\u6bcf\u4e2a\u5b57\u8282\u90fd\u88ab\u521d\u59cb\u5316\u4e3a\u96f6\u3002<\/p>\n<\/p>\n
\u4ece\u53ef\u8fed\u4ee3\u5bf9\u8c61\u521b\u5efa\u5b57\u8282\u5bf9\u8c61<\/h3>\n<\/p>\n
bytes()<\/code>\u51fd\u6570\u8fd8\u53ef\u4ee5\u4ece\u53ef\u8fed\u4ee3\u5bf9\u8c61\uff08\u5982\u5217\u8868\u3001\u5143\u7ec4\uff09\u521b\u5efa\u5b57\u8282\u5bf9\u8c61\u3002\u6b64\u65f6\uff0c\u8fed\u4ee3\u5bf9\u8c61\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u5fc5\u987b\u662f\u6574\u6570\uff0c\u4e14\u8303\u56f4\u57280\u5230255\u4e4b\u95f4\u3002<\/p>\n<\/p>\n
# \u4ece\u53ef\u8fed\u4ee3\u5bf9\u8c61\u521b\u5efa\u5b57\u8282\u5bf9\u8c61<\/p>\n
iterable = [72, 101, 108, 108, 111]<\/p>\n
bytes_obj = bytes(iterable)<\/p>\n
print(bytes_obj)  # \u8f93\u51fa\uff1ab'Hello'<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u6b64\u793a\u4f8b\u4e2d\uff0cbytes(iterable)<\/code>\u521b\u5efa\u4e00\u4e2a\u5b57\u8282\u5bf9\u8c61bytes_obj<\/code>\uff0c\u5b57\u8282\u5bf9\u8c61\u4e2d\u7684\u6bcf\u4e2a\u5b57\u8282\u5bf9\u5e94\u4e8e\u8fed\u4ee3\u5bf9\u8c61\u4e2d\u7684\u4e00\u4e2a\u6574\u6570\u3002<\/p>\n<\/p>\n
\u4e09\u3001\u4f7f\u7528 struct<\/code> \u6a21\u5757<\/h2>\n<\/p>\n
struct<\/code>\u6a21\u5757\u7528\u4e8e\u5728Python\u4e2d\u5904\u7406\u4e8c\u8fdb\u5236\u6570\u636e\uff0c\u5e38\u7528\u4e8e\u5c06\u6570\u636e\u6253\u5305\u6210\u5b57\u8282\u5bf9\u8c61\u6216\u4ece\u5b57\u8282\u5bf9\u8c61\u89e3\u5305\u6570\u636e\u3002\u8be5\u6a21\u5757\u63d0\u4f9b\u4e86\u591a\u79cd\u51fd\u6570\u548c\u683c\u5f0f\u5b57\u7b26\uff0c\u4ee5\u4fbf\u4e8e\u5904\u7406\u4e0d\u540c\u7c7b\u578b\u7684\u6570\u636e\u3002<\/p>\n<\/p>\n
\u6570\u636e\u6253\u5305\u6210\u5b57\u8282\u5bf9\u8c61<\/h3>\n<\/p>\n
struct.pack()<\/code>\u51fd\u6570\u7528\u4e8e\u5c06\u6570\u636e\u6253\u5305\u6210\u5b57\u8282\u5bf9\u8c61\u3002\u5b83\u9700\u8981\u4e24\u4e2a\u53c2\u6570\uff1a\u683c\u5f0f\u5b57\u7b26\u4e32\u548c\u8981\u6253\u5305\u7684\u6570\u636e\u3002\u683c\u5f0f\u5b57\u7b26\u4e32\u6307\u5b9a\u4e86\u6570\u636e\u7684\u7c7b\u578b\u548c\u5b57\u8282\u987a\u5e8f\u3002<\/p>\n<\/p>\n
import struct<\/p>\n
\u5c06\u6570\u636e\u6253\u5305\u6210\u5b57\u8282\u5bf9\u8c61<\/strong><\/h2>\n
data = (1, b'A', 2.5)<\/p>\n
bytes_obj = struct.pack('i c f', *data)<\/p>\n
print(bytes_obj)  # \u8f93\u51fa\uff1ab'\\x01\\x00\\x00\\x00A\\x00\\x00\\x00\\x00\\x00 @'<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u6b64\u793a\u4f8b\u4e2d\uff0cstruct.pack('i c f', *data)<\/code>\u5c06\u6574\u6570\u3001\u5b57\u7b26\u548c\u6d6e\u70b9\u6570\u6253\u5305\u6210\u5b57\u8282\u5bf9\u8c61bytes_obj<\/code>\u3002\u683c\u5f0f\u5b57\u7b26\u4e32'i c f'<\/code>\u6307\u5b9a\u4e86\u6570\u636e\u7684\u7c7b\u578b\u548c\u987a\u5e8f\uff0c\u5176\u4e2d'i'<\/code>\u8868\u793a\u6574\u6570\uff0c'c'<\/code>\u8868\u793a\u5b57\u7b26\uff0c'f'<\/code>\u8868\u793a\u6d6e\u70b9\u6570\u3002<\/p>\n<\/p>\n
\u4ece\u5b57\u8282\u5bf9\u8c61\u89e3\u5305\u6570\u636e<\/h3>\n<\/p>\n
struct.unpack()<\/code>\u51fd\u6570\u7528\u4e8e\u4ece\u5b57\u8282\u5bf9\u8c61\u89e3\u5305\u6570\u636e\u3002\u5b83\u9700\u8981\u4e24\u4e2a\u53c2\u6570\uff1a\u683c\u5f0f\u5b57\u7b26\u4e32\u548c\u5b57\u8282\u5bf9\u8c61\u3002\u683c\u5f0f\u5b57\u7b26\u4e32\u6307\u5b9a\u4e86\u5b57\u8282\u5bf9\u8c61\u4e2d\u6570\u636e\u7684\u7c7b\u578b\u548c\u5b57\u8282\u987a\u5e8f\u3002<\/p>\n<\/p>\n
import struct<\/p>\n
\u4ece\u5b57\u8282\u5bf9\u8c61\u89e3\u5305\u6570\u636e<\/strong><\/h2>\n
bytes_obj = b'\\x01\\x00\\x00\\x00A\\x00\\x00\\x00\\x00\\x00 @'<\/p>\n
data = struct.unpack('i c f', bytes_obj)<\/p>\n
print(data)  # \u8f93\u51fa\uff1a(1, b'A', 2.5)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u6b64\u793a\u4f8b\u4e2d\uff0cstruct.unpack('i c f', bytes_obj)<\/code>\u4ece\u5b57\u8282\u5bf9\u8c61bytes_obj<\/code>\u89e3\u5305\u51fa\u6574\u6570\u3001\u5b57\u7b26\u548c\u6d6e\u70b9\u6570\u3002<\/p>\n<\/p>\n
\u56db\u3001\u4f7f\u7528 pickle<\/code> \u6a21\u5757<\/h2>\n<\/p>\n
pickle<\/code>\u6a21\u5757\u7528\u4e8e\u5728Python\u4e2d\u5e8f\u5217\u5316\u548c\u53cd\u5e8f\u5217\u5316\u5bf9\u8c61\u3002\u5e8f\u5217\u5316\u662f\u5c06\u5bf9\u8c61\u8f6c\u6362\u4e3a\u5b57\u8282\u5bf9\u8c61\u7684\u8fc7\u7a0b\uff0c\u800c\u53cd\u5e8f\u5217\u5316\u662f\u4ece\u5b57\u8282\u5bf9\u8c61\u6062\u590d\u5bf9\u8c61\u7684\u8fc7\u7a0b\u3002pickle<\/code>\u6a21\u5757\u63d0\u4f9b\u4e86\u7b80\u5355\u6613\u7528\u7684\u63a5\u53e3\uff0c\u9002\u5408\u4e8e\u5c06Python\u5bf9\u8c61\u6301\u4e45\u5316\u5b58\u50a8\u3002<\/p>\n<\/p>\n
\u5bf9\u8c61\u5e8f\u5217\u5316\u4e3a\u5b57\u8282\u5bf9\u8c61<\/h3>\n<\/p>\n
pickle.dumps()<\/code>\u51fd\u6570\u7528\u4e8e\u5c06Python\u5bf9\u8c61\u5e8f\u5217\u5316\u4e3a\u5b57\u8282\u5bf9\u8c61\u3002\u5b83\u9700\u8981\u4e00\u4e2a\u53c2\u6570\uff0c\u5373\u8981\u5e8f\u5217\u5316\u7684\u5bf9\u8c61\u3002<\/p>\n<\/p>\n
import pickle<\/p>\n
\u5bf9\u8c61\u5e8f\u5217\u5316\u4e3a\u5b57\u8282\u5bf9\u8c61<\/strong><\/h2>\n
data = {'name': 'Alice', 'age': 25, 'city': 'New York'}<\/p>\n
bytes_obj = pickle.dumps(data)<\/p>\n
print(bytes_obj)  # \u8f93\u51fa\uff1a\u5b57\u8282\u5bf9\u8c61\u8868\u793a\u7684\u5e8f\u5217\u5316\u6570\u636e<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u6b64\u793a\u4f8b\u4e2d\uff0cpickle.dumps(data)<\/code>\u5c06\u5b57\u5178\u5bf9\u8c61data<\/code>\u5e8f\u5217\u5316\u4e3a\u5b57\u8282\u5bf9\u8c61bytes_obj<\/code>\u3002<\/p>\n<\/p>\n
\u4ece\u5b57\u8282\u5bf9\u8c61\u53cd\u5e8f\u5217\u5316\u5bf9\u8c61<\/h3>\n<\/p>\n
pickle.loads()<\/code>\u51fd\u6570\u7528\u4e8e\u4ece\u5b57\u8282\u5bf9\u8c61\u53cd\u5e8f\u5217\u5316\u5bf9\u8c61\u3002\u5b83\u9700\u8981\u4e00\u4e2a\u53c2\u6570\uff0c\u5373\u5b57\u8282\u5bf9\u8c61\u3002<\/p>\n<\/p>\n
import pickle<\/p>\n
\u4ece\u5b57\u8282\u5bf9\u8c61\u53cd\u5e8f\u5217\u5316\u5bf9\u8c61<\/strong><\/h2>\n
bytes_obj = b'\\x80\\x03}q\\x00(X\\x04\\x00\\x00\\x00nameq\\x01X\\x05\\x00\\x00\\x00Aliceq\\x02X\\x03\\x00\\x00\\x00ageq\\x03K\\x19X\\x04\\x00\\x00\\x00cityq\\x04X\\x08\\x00\\x00\\x00New Yorkq\\x05u.'<\/p>\n
data = pickle.loads(bytes_obj)<\/p>\n
print(data)  # \u8f93\u51fa\uff1a{'name': 'Alice', 'age': 25, 'city': 'New York'}<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u6b64\u793a\u4f8b\u4e2d\uff0cpickle.loads(bytes_obj)<\/code>\u4ece\u5b57\u8282\u5bf9\u8c61bytes_obj<\/code>\u53cd\u5e8f\u5217\u5316\u51fa\u5b57\u5178\u5bf9\u8c61data<\/code>\u3002<\/p>\n<\/p>\n
\u4e94\u3001\u4f7f\u7528 bytearray()<\/code> \u51fd\u6570<\/h2>\n<\/p>\n
bytearray()<\/code>\u51fd\u6570\u7528\u4e8e\u521b\u5efa\u53ef\u53d8\u7684\u5b57\u8282\u6570\u7ec4\u3002\u4e0ebytes()<\/code>\u51fd\u6570\u4e0d\u540c\uff0cbytearray()<\/code>\u521b\u5efa\u7684\u5bf9\u8c61\u662f\u53ef\u53d8\u7684\uff0c\u53ef\u4ee5\u8fdb\u884c\u4fee\u6539\u3002bytearray()<\/code>\u51fd\u6570\u53ef\u4ee5\u4ece\u6574\u6570\u3001\u53ef\u8fed\u4ee3\u5bf9\u8c61\u6216\u5b57\u7b26\u4e32\uff08\u9700\u8981\u6307\u5b9a\u7f16\u7801\uff09\u521b\u5efa\u5b57\u8282\u6570\u7ec4\u3002<\/p>\n<\/p>\n
\u4ece\u6574\u6570\u521b\u5efa\u5b57\u8282\u6570\u7ec4<\/h3>\n<\/p>\n
\u5f53\u4f7f\u7528bytearray()<\/code>\u51fd\u6570\u4ece\u6574\u6570\u521b\u5efa\u5b57\u8282\u6570\u7ec4\u65f6\uff0c\u6574\u6570\u8868\u793a\u5b57\u8282\u6570\u7ec4\u7684\u957f\u5ea6\uff0c\u5b57\u8282\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e2a\u5b57\u8282\u90fd\u88ab\u521d\u59cb\u5316\u4e3a\u96f6\u3002<\/p>\n<\/p>\n
# \u4ece\u6574\u6570\u521b\u5efa\u5b57\u8282\u6570\u7ec4<\/p>\n
length = 5<\/p>\n
byte_array = bytearray(length)<\/p>\n
print(byte_array)  # \u8f93\u51fa\uff1abytearray(b'\\x00\\x00\\x00\\x00\\x00')<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u6b64\u793a\u4f8b\u4e2d\uff0cbytearray(length)<\/code>\u521b\u5efa\u4e00\u4e2a\u957f\u5ea6\u4e3a5\u7684\u5b57\u8282\u6570\u7ec4byte_array<\/code>\uff0c\u6bcf\u4e2a\u5b57\u8282\u90fd\u88ab\u521d\u59cb\u5316\u4e3a\u96f6\u3002<\/p>\n<\/p>\n
\u4ece\u53ef\u8fed\u4ee3\u5bf9\u8c61\u521b\u5efa\u5b57\u8282\u6570\u7ec4<\/h3>\n<\/p>\n
bytearray()<\/code>\u51fd\u6570\u8fd8\u53ef\u4ee5\u4ece\u53ef\u8fed\u4ee3\u5bf9\u8c61\uff08\u5982\u5217\u8868\u3001\u5143\u7ec4\uff09\u521b\u5efa\u5b57\u8282\u6570\u7ec4\u3002\u6b64\u65f6\uff0c\u8fed\u4ee3\u5bf9\u8c61\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u5fc5\u987b\u662f\u6574\u6570\uff0c\u4e14\u8303\u56f4\u57280\u5230255\u4e4b\u95f4\u3002<\/p>\n<\/p>\n
# \u4ece\u53ef\u8fed\u4ee3\u5bf9\u8c61\u521b\u5efa\u5b57\u8282\u6570\u7ec4<\/p>\n
iterable = [72, 101, 108, 108, 111]<\/p>\n
byte_array = bytearray(iterable)<\/p>\n
print(byte_array)  # \u8f93\u51fa\uff1abytearray(b'Hello')<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u6b64\u793a\u4f8b\u4e2d\uff0cbytearray(iterable)<\/code>\u521b\u5efa\u4e00\u4e2a\u5b57\u8282\u6570\u7ec4byte_array<\/code>\uff0c\u5b57\u8282\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e2a\u5b57\u8282\u5bf9\u5e94\u4e8e\u8fed\u4ee3\u5bf9\u8c61\u4e2d\u7684\u4e00\u4e2a\u6574\u6570\u3002<\/p>\n<\/p>\n
\u4fee\u6539\u5b57\u8282\u6570\u7ec4<\/h3>\n<\/p>\n
\u7531\u4e8ebytearray<\/code>\u662f\u53ef\u53d8\u7684\uff0c\u53ef\u4ee5\u4fee\u6539\u5176\u5185\u5bb9\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u901a\u8fc7\u7d22\u5f15\u6216\u5207\u7247\u6765\u4fee\u6539\u5b57\u8282\u6570\u7ec4\u3002<\/p>\n<\/p>\n
# \u4fee\u6539\u5b57\u8282\u6570\u7ec4<\/p>\n
byte_array = bytearray(b'Hello')<\/p>\n
byte_array[0] = 74  # \u5c06'H'\u4fee\u6539\u4e3a'J'<\/p>\n
print(byte_array)  # \u8f93\u51fa\uff1abytearray(b'Jello')<\/p>\n
byte_array[1:3] = b'oy'  # \u4fee\u6539\u5207\u7247<\/p>\n
print(byte_array)  # \u8f93\u51fa\uff1abytearray(b'Joylo')<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u6b64\u793a\u4f8b\u4e2d\uff0c\u901a\u8fc7\u7d22\u5f15\u548c\u5207\u7247\u4fee\u6539\u5b57\u8282\u6570\u7ec4byte_array<\/code>\u7684\u5185\u5bb9\u3002<\/p>\n<\/p>\n
\u7efc\u4e0a\u6240\u8ff0\uff0cPython\u4e2d\u6709\u591a\u79cd\u65b9\u6cd5\u53ef\u4ee5\u5c06\u6570\u636e\u8f6c\u6362\u4e3a\u5b57\u8282\u5bf9\u8c61\uff08bytes\uff09\uff0c\u5305\u62ec\u4f7f\u7528encode()<\/code>\u65b9\u6cd5\u3001bytes()<\/code>\u51fd\u6570\u3001struct<\/code>\u6a21\u5757\u3001pickle<\/code>\u6a21\u5757\u548cbytearray()<\/code>\u51fd\u6570\u3002\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\u53d6\u51b3\u4e8e\u6570\u636e\u7684\u7c7b\u578b\u548c\u8f6c\u6362\u7684\u5177\u4f53\u9700\u6c42\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
 \u5982\u4f55\u5728Python\u4e2d\u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3abytes\u7c7b\u578b\uff1f<\/strong>
\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528encode()<\/code>\u65b9\u6cd5\u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3abytes\u7c7b\u578b\u3002\u4f8b\u5982\uff0cmy_string = "Hello, World!"<\/code>\uff0c\u4f60\u53ef\u4ee5\u901a\u8fc7my_bytes = my_string.encode('utf-8')<\/code>\u5c06\u5176\u8f6c\u6362\u4e3abytes\u3002\u8fd9\u91cc\u7684'utf-8'<\/code>\u662f\u6307\u5b9a\u7684\u7f16\u7801\u683c\u5f0f\uff0c\u5176\u4ed6\u7f16\u7801\u683c\u5f0f\u5982'ascii'<\/code>\u6216'latin-1'<\/code>\u4e5f\u53ef\u4ee5\u6839\u636e\u9700\u8981\u4f7f\u7528\u3002<\/p>\n
\u5728Python\u4e2d\u5982\u4f55\u5c06\u6574\u6570\u8f6c\u6362\u4e3abytes\uff1f<\/strong>
\u8981\u5c06\u6574\u6570\u8f6c\u6362\u4e3abytes\uff0c\u53ef\u4ee5\u4f7f\u7528\u5185\u7f6e\u7684int.to_bytes()<\/code>\u65b9\u6cd5\u3002\u8bed\u6cd5\u4e3aint_value.to_bytes(length, byteorder)<\/code>\uff0c\u5176\u4e2dlength<\/code>\u662f\u76ee\u6807bytes\u7684\u957f\u5ea6\uff0cbyteorder<\/code>\u53ef\u4ee5\u662f'big'<\/code>\u6216'little'<\/code>\uff0c\u8868\u793a\u5b57\u8282\u7684\u987a\u5e8f\u3002\u4f8b\u5982\uff0cmy_int = 123<\/code>\u53ef\u4ee5\u901a\u8fc7my_bytes = my_int.to_bytes(2, 'big')<\/code>\u8f6c\u6362\u4e3abytes\u3002<\/p>\n
\u6709\u54ea\u4e9b\u65b9\u6cd5\u53ef\u4ee5\u5c06\u5217\u8868\u8f6c\u6362\u4e3abytes\u683c\u5f0f\uff1f<\/strong>
\u5c06\u5217\u8868\u8f6c\u6362\u4e3abytes\u53ef\u4ee5\u4f7f\u7528bytearray<\/code>\u6216bytes()<\/code>\u6784\u9020\u51fd\u6570\u3002\u82e5\u5217\u8868\u5305\u542b\u6574\u6570\uff08\u6bcf\u4e2a\u6574\u6570\u5e94\u57280\u5230255\u4e4b\u95f4\uff09\uff0c\u53ef\u4ee5\u4f7f\u7528bytes(my_list)<\/code>\uff0c\u5982my_list = [65, 66, 67]<\/code>\uff0c\u90a3\u4e48my_bytes = bytes(my_list)<\/code>\u4f1a\u5f97\u5230b'ABC'<\/code>\u3002\u5982\u679c\u5217\u8868\u4e2d\u5305\u542b\u5176\u4ed6\u7c7b\u578b\u7684\u6570\u636e\uff0c\u901a\u5e38\u9700\u8981\u5148\u5c06\u5176\u8f6c\u6362\u4e3a\u5b57\u7b26\u4e32\u6216\u5176\u4ed6\u53ef\u8f6c\u5316\u4e3abytes\u7684\u683c\u5f0f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"Python\u4e2d\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528encode()\u65b9\u6cd5\u3001bytes()\u51fd\u6570\u3001struct\u6a21\u5757\u3001pickle\u6a21\u5757\u548cbyt […]","protected":false},"author":3,"featured_media":968772,"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\/968768"}],"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=968768"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/968768\/revisions"}],"predecessor-version":[{"id":968773,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/968768\/revisions\/968773"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/968772"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=968768"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=968768"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=968768"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}