f=open('1.mp3','rb')
d=str(f.read())
f.close()
       
file=open('tempfile.dat','wb')
file.write(str(d.encode('hex')))
file.close()

import os
import tempfile
 
f = tempfile.NamedTemporaryFile(delete=False)
...
os.rename(f.name, 'some_new_filename')