[Tutor PyCZ] Lama potrebuje help...

[Jaroslav Pachola]

Jeje, to jsem teda docela dost ulitl, beru zpet. Tak to dopada, kdyz clovek 
mysli na neco jineho a necte mail poradne.

JP

Dne Wednesday 03 May 2006 14:06 Petr Vaněk napsal(a):
> Dne středa 03 květen 2006 14:04 Jaroslav Pachola napsal(a):
> > Ahoj,
> >
> > rozsah = 2,(N / 2) + 1  vytvori dvouclenny tuple, ale range ocekava
> > samostatne parametry typu integer. Tedy budto lze napsat
> >
> > > Exception in Tkinter callback
> > > Traceback (most recent call last):
> > >   File "C:\Program Files\Python24\lib\lib-tk\Tkinter.py", line 1345, in
> > > __call__
> > >     return self.func(*args)
> > >   File "C:\Program Files\Python24\2_2_okna.pyw", line 30, in
> > > jePrvocislo rozsah = 2,(N / 2) + 1
> > > TypeError: unsupported operand type(s) for /: 'str' and 'int'
>
> anebo take spise delis string cislem:
> pvanek na pvanek:~> python
> Python 2.4.1 (#1, Sep 13 2005, 00:39:20)
> [GCC 4.0.2 20050901 (prerelease) (SUSE Linux)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
>
> >>> N = "jakysik string"
> >>> (N / 2) + 1
>
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> TypeError: unsupported operand type(s) for /: 'str' and 'int'
>
>
> musis si ten retezec preves na cislo. Treba ineger:
> def toint(x):
>   try:
>     return int(x)
>   except ValueError:
>     return 0
>
> coz vrati 0 kdyz je chyba v prevodu na integer - t.j. pro stringy nebo pro
> "prilis velka cisla"
>
> p.
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