Write file with specific permissions in Python

Question

I'm trying to create a file that is only user-readable and -writable (0600).

Is the only way to do so by using os.open() as follows?

import os
fd = os.open('/path/to/file', os.O_WRONLY, 0o600)
myFileObject = os.fdopen(fd)
myFileObject.write(...)
myFileObject.close()

Ideally, I'd like to be able to use the with keyword so I can close the object automatically. Is there a better way to do what I'm doing above?