[BUG] Cannot pickle _thread.RLock object when saving cookieJar

[MrMarble]

Describe the bug
I copied the example in https://curl-cffi.readthedocs.io/en/latest/cookies.html#how-to-save-and-load-cookies and when trying to call save_cookies(client) I get this error.

To Reproduce

from curl_cffi import requests
import pickle

def save_cookies(client):
    with open("cookies.pk", "wb") as f:
        pickle.dump(client.cookies.jar, f)


def main():
    client = requests.Session(impersonate="chrome")
    client.get("https://httpbin.org/cookies/set/foo/bar")
    save_cookies(client)

if __name__ == "__main__":
    main()

Expected behavior
Pickle is able to save the cookieJar to a file

Versions

• OS: Windows 11
• Python: 3.10.6
• curl_cffi version 0.7.1

beautifulsoup4==4.12.3
certifi==2024.8.30
cffi==1.17.1
charset-normalizer==3.3.2
curl_cffi==0.7.1
idna==3.10
pyaml==24.7.0
pycparser==2.22
PyYAML==6.0.2
soupsieve==2.6
urllib3==2.2.3

Additional context

• I was able to save the cookies using normal requests session (before switching to curl_cffi)

[lexiforest]

Sorry, this is a misleading example that actually does not work. We have discussed this in #43 and I will update the docs.