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Recipe 578689 revision 1 

import winreg

def regkey_value(path, name="", start_key = None):
    if isinstance(path, str):
        path = path.split("\\")
    if start_key is None:
        start_key = getattr(winreg, path[0])
        return regkey_value(path[1:], name, start_key)
    else:
        subkey = path.pop(0)
    with winreg.OpenKey(start_key, subkey) as handle:
        assert handle
        if path:
            return regkey_value(path, name, handle)
        else:
            desc, i = None, 0
            while not desc or desc[0] != name:
                desc = winreg.EnumValue(handle, i)
                i += 1
            return desc[1]

# example usage
bios_vendor = regkey_value(r"HKEY_LOCAL_MACHINE\HARDWARE\DESCRIPTION\System\BIOS", "BIOSVendor")

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