Modules for Python that can be used as a TFTP server

Are there any modules for Python, that can be used as a TFTP server? 开发者_高级运维I tried Tftpy, but when I try to upload something, it says:

ERROR:tftpy:Write requests not implemented at this time.

In fact, that's the only function that I need.

---

You may try tftpgui from http://code.google.com/p/tftpgui/ but it's GPL'ed.

UPD: uploading is available starting with TFTPy 0.5.0+

UPD2: I personally found PyPXE minimal hackish TFTP implementation sufficient for bootstrapping virtual machines. If your use case the same as mine - use that.