通过套接字发送 Python 对象

Posted 2023-02-15

【中文标题】通过套接字发送 Python 对象

【英文标题】：Sending Python object throughth socket

【发布时间】：2022-01-15 20:22:35

【问题描述】：

我有一个问题，然后通过套接字发送列表， 它必须是类似字节的对象，我可以转换它 字符串然后做.encode("utf-8")，但是问题 这里它是 string 并且很难重建它 从字符串中列出，从 ast 库中列出 literal_eval() 没用然后我有类似的东西：

[("Something", datetime.datetime(2021, 12, 11, 0, 0))]

这就是问题所在，我必须拥有这些对象，而我的 问题是如何发送 python 对象而不需要 将其转换为字符串，或类似某种对象 像 JSON 这样的符号？

这可以在 Python Socket Documentation 的基本套接字服务器上进行测试。

失败的文字评估：

from ast import literal_eval
new_line = literal_eval("[(2, 2.0, 'MS-0150886', 'B1A', 'MP5 TEST IS HERE!', None, None, datetime.datetime(2021, 8, 13, 0, 0), datetime.datetime(2021, 8, 13, 0, 0), 38.0, None, None, '1', None, None, None, 1.0, None, 1.0, 'KS-005418-2', 'KS-005419-1', 'SPRAWDZ 9', None, None, None, 1.0, None, None, None, None, 1.0, 1)]")
print(new_line)
print(type(new_line))

错误：

Traceback (most recent call last):
  File "C:\I deleted\this path\test.py", line 3, in <module>
    new_line = literal_eval("[(2, 2.0, 'MS-0150886', 'B1A', 'MP5 TEST IS HERE!', None, None, datetime.datetime(2021, 8, 13, 0, 0), datetime.datetime(2021, 8, 13, 0, 0), 38.0, None, None, '1', None, None, None, 1.0, None, 1.0, 'KS-005418-2', 'KS-005419-1', 'SPRAWDZ 9', None, None, None, 1.0, None, None, None, None, 1.0, 1)]")
  File "C:\Program Files\Python39\lib\ast.py", line 105, in literal_eval
    return _convert(node_or_string)
  File "C:\Program Files\Python39\lib\ast.py", line 85, in _convert
    return list(map(_convert, node.elts))
  File "C:\Program Files\Python39\lib\ast.py", line 83, in _convert
    return tuple(map(_convert, node.elts))
  File "C:\Program Files\Python39\lib\ast.py", line 104, in _convert
    return _convert_signed_num(node)
  File "C:\Program Files\Python39\lib\ast.py", line 78, in _convert_signed_num
    return _convert_num(node)
  File "C:\Program Files\Python39\lib\ast.py", line 69, in _convert_num
    _raise_malformed_node(node)
  File "C:\Program Files\Python39\lib\ast.py", line 66, in _raise_malformed_node
    raise ValueError(f'malformed node or string: node!r')
ValueError: malformed node or string: <ast.Call object at 0x000001B82F7CDDF0>

【参考方案1】：

你试过pickle吗？

import pickle

# Client
data = [("Something", datetime.datetime(2021, 12, 11, 0, 0))]
s.sendall(pickle.dumps(data))

# Server
data = pickle.loads(conn.recv(1024))
print(data)