My Windows is 64bit, and when runing 64bit process , thread.teb_base is okay.
But when I run 32bit process, thread.teb_base is wrong, because it is not same as x32dbg result:
My code resuit

x32dbg views:

My python code:

    targetProcess = None
    processList = windows.system.enumerate_processes()
    for process in processList:
        print("process name:", process.name)
        # HWorks32.exe
        if process.name == "HWorks32.exe":
            targetProcess = process

    threadList = targetProcess.threads

    for thread in threadList:
        teb = thread.teb_base
        print("teb:", hex(teb))

I sure the x32dbg result is true, because I actually wanna get stackBaseAddress from teb:

stackBaseAddress = process.read_ptr(teb + 4)

The above code would get some 0x0 stackBaseAddress and would throw exception if I read it, but In x32dbg, I search it manually, the result is okay.

And you can find that the difference x32dbg teb between code result is 0x2000! It mean that I can add 0x2000 to very teb in my code and can get the true teb!