[Tutor] Doubts galore.

[prasad rao]

Hi

def cript(doc=None,data =None):
   if  doc==None and data==None:doc=sys.agv1
   elif doc:
        data=open(doc,'r').read()
        data_c= binascii.hexlify(data)
   else:data_c= binascii.hexlify(data)
   if doc:
        q=tempfile.TemporaryFile()
        q.write(data_c)
        os.rename(q,doc)
        return
   return data_c


cript(doc='./language.txt')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<stdin>", line 10, in cript
TypeError: coercing to Unicode: need string or buffer, file found

1)Why I got the above error message with  the above function?How to correct it?
2)Is it reasonable to have 2 if blocks in a function as above?
3)Dose the tempfile create a fileobject on harddisk or in memory(Dose it save my
  file as I expect it to do)

Please someone enlighten me.

Prasad