(curses) issue about inch()

[Jimmy]

On Sep 17, 2:25 am, Steve Holden <st... at holdenweb.com> wrote:
> Jimmy wrote:
> > On Sep 17, 12:07 am, Steve Holden <st... at holdenweb.com> wrote:
> >> Jimmy wrote:
> >>> hi, all
> >>> I attempt to use the function inch() to get the character at the
> >>> current position, and compare it with a particular character like :
> >>> if screen.inch(x,y) == 'F'
> >>> but this method doesn't seem work, can anyone tell me the reason and
> >>> how to corrent it
> >>> thanks
> >> The reason is because something is wrong, and yo fix it by correcting
> >> that issue.
>
> >> In other words, if you could be a bit more specific about *how* it
> >> doesn't work (like, show us the code you are running,a nd any error
> >> messages or evidence of incorrect results) you will be able to get some
> >> help that actually helps you.
>
> >> Would you go to a car repair shop with faulty brakes and just tell them
> >> "my car isn't working"?
>
> >> regards
> >>   Steve
> >> --
> >> Steve Holden        +1 571 484 6266   +1 800 494 3119
> >> Holden Web LLC/Ltd          http://www.holdenweb.com
> >> Skype: holdenweb      http://del.icio.us/steve.holden
>
> >> Sorry, the dog ate my .sigline
>
> > thanks,
> > actually i'm writing a game like mine,the pertainign code is:
>
> > def mark():
> >    """mark the bomb"""
> >    (row, col) = gb.scrn.getyx()
> >    x = gb.scrn.inch(row,col)
> >    if x == 'F':
> >            gb.scrn.addch(row,col, 'X',curses.color_pair(3))
> >    else:
> >            gb.scrn.addch(row,col, 'F',curses.color_pair(3))
>
> >    gb.scrn.move(row,col)
> >    gb.scrn.refresh()
>
> > the situation is x never equals 'F', even when it really is!
> > I checked the mannual and found the return value of inch() consists
> > the actual character(low 8bits)
> > and the attributes, so I tried the following: (x<<24)>>24,cause I
> > guess the int is 32bits long.
> > but it still doesn't work :(
>
> Well first of all, thanks for reading the manual.
>
> Let's suppose the value you are receiving is 1234 (clearly more than 8
> bits). Unfortunately for you, recent versions of Python don't just use
> 32-bit integers, but extend the values into Python's long values where
> necessary. See:
>
>  >>> (1234<<24)>>24
> 1234L
>  >>>
>
> What you really need is a logical and with 255:
>
>  >>> 1234 & 255
> 210
>  >>>
>
> Hope this helps.
>
> regards
>   Steve
> --
> Steve Holden        +1 571 484 6266   +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb      http://del.icio.us/steve.holden
>
> Sorry, the dog ate my .sigline

thanks, it works!
python is cool, however, the python community is even cooler :)