basic doubt

[Cameron Simpson]

On 17Jun2010 05:11, Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:
| En Thu, 17 Jun 2010 02:06:54 -0300, madhuri vio
| <madhuri.vio at gmail.com> escribió:
| 
| >def h(self,event):
| >    handle = open("myco.fasta","r")
| >    for seq_record in SeqIO.parse(handle, "fasta"):
| >         messenger_rna = coding_myco.fasta.transcribe()
| >         han1 = open("mycorna.fasta","wU")
| >         han1.close()
| >         return self.messenger_rna
| >
| >
| >the error is...
| >
| >File "/usr/lib/python2.6/lib-tk/Tkinter.py", line 1413, in __call__
| >    return self.func(*args)
| >TypeError: h() takes exactly 2 arguments (0 given)
| >
| > ia m unable to debug...i am stuck
| 
| This is just a guess, but looks like your h function is a plain
| function, not a method, so it doesn't take a "self" parameter. Also,
| you are probably using it in some place where the callback doesn't
| receive any additional arguments (like a Button command).
| Try with def f(): ...
| If it doesn't work, show us the part where h is used.

And have a look at the documentation for the "functools" module,
particularly the "partial" function:

  f2 = functools.partial(f, arg1, arg2, ...)

Then calling f2() will call f(arg1, arg2, ...). So you can pass "f2"
to an event handler. Of course, this means you need to know arg1 etc in
advance.

However, you really do need to show the calling end of your code.

Cheers,
-- 
Cameron Simpson <cs at zip.com.au> DoD#743
http://www.cskk.ezoshosting.com/cs/

You see: Mr. Drogo, he married poor Miss Primula Brandybuck.  She was our Mr.
Bilbo's first cousin on the mother's side (her mother being the youngest of
the Old Took's daughters); and Mr. Drogo was his second cousin.  So Mr. Frodo
is his first *and* second cousin, once removed either way, as the saying is,
if you follow me.       - the Gaffer, _Lord_of_the_Rings_