序列化Python代码对象（来自compile()）

发布于 2025-01-15 07:55:30 字数 336 浏览 2 评论 0原文

通过创建 Python 代码对象后，

code = """a = 5
a += 6
print(a)
"""

obj = compile(code, "foobar.py", "exec")
print(obj)

<code object <module> at 0x7f6bef0ea190, file "foobar.py", line 1>

我想将该对象存储在字符串或文件中，以便稍后可以再次从文件构造 obj。（我不想存储纯字符串。）

原文

After creating a Python code object via

code = """a = 5
a += 6
print(a)
"""

obj = compile(code, "foobar.py", "exec")
print(obj)

<code object <module> at 0x7f6bef0ea190, file "foobar.py", line 1>

I would like to store that object in a string or file such that I can later construct the obj from the file again. (I do not want to store the plain string.)

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后知后觉 2025-01-22 07:55:30

我也遇到过同样的任务。

您可以使用 marshal，其中包含常见的警告和文档：

警告 marshal 模块并非旨在防止错误或恶意构建的数据。切勿解组从不受信任或未经身份验证的来源收到的数据。

存储到文件：

import marshal

with open("foobar.pyc", "wb") as f:
    marshal.dump(obj, f)
with open("foobar.pyc", "rb") as f:
    obj_restored = marshal.load(f)

print(obj_restored == obj)

另存为字符串：

import base64
import marshal

serialized = marshal.dumps(obj)
obj_bytes = base64.b64encode(serialized)  # b64 bytes
obj_ascii_str = obj_bytes.decode("ascii")  # b64 string for json

restored_serialized = base64.b64decode(obj_ascii_str)
obj_restored = marshal.loads(restored_serialized)
print(obj_restored == obj)

I've come across the same task.

You can use marshal, with the usual warning and some other limitations listed in the docs:

Warning The marshal module is not intended to be secure against erroneous or maliciously constructed data. Never unmarshal data received from an untrusted or unauthenticated source.

Storing to file:

import marshal

with open("foobar.pyc", "wb") as f:
    marshal.dump(obj, f)
with open("foobar.pyc", "rb") as f:
    obj_restored = marshal.load(f)

print(obj_restored == obj)

Saving as string:

import base64
import marshal

serialized = marshal.dumps(obj)
obj_bytes = base64.b64encode(serialized)  # b64 bytes
obj_ascii_str = obj_bytes.decode("ascii")  # b64 string for json

restored_serialized = base64.b64decode(obj_ascii_str)
obj_restored = marshal.loads(restored_serialized)
print(obj_restored == obj)

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