Just a quick 'Thank you' for this advice the other day Alan and
Abdur-Rahmaan.
Greatly appreciated as we work together with our students here.
Thank you.
Matthew Polack | Teacher
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On Thu, Aug 9, 2018 at 6:38 PM, Alan Gauld via Tutor <tutor@python.org>
wrote:
> On 09/08/18 05:10, Matthew Polack wrote:
>
> > I'm trying to configure a button that prints a variable and calls a
> > function at the same time...but I can't figure out how to get the syntax
> > right...or if this is even possible:
> Of couse its possible just wrap it in a higher level function:
>
> def newfunc():
> print(variable)
> callFunction()
>
> > print("You have selected to convert "), croptype
>
> The crop type needs to be inside the parens
> if you want it printed. That's the syntax error.
>
> If you are trying to call a function called croptype
> then you need to put it on a separate line and lose the ,
> and add parens.
>
>
> > code for this part says;
> >
> > def wheatwords():
> > print("You have selected to convert "), croptype
> > price = int(float(input("What is the current price?")))
> > amount = int(input("\n How much grain in metric tonnes?"))
> > print("This is")
> > print(price * amount, "Metric Tonnes")
> >
>
> I'll assume the lack of indentation is an email formatting
> issue. Did you post in plain text?
>
>
> > wheatbutton = Button(root, text="Wheat", fg="black", bg="yellow")
> > wheatbutton.configure(croptype="wheat", command=wheatwords)
>
> You set croptype to "wheat" but croptype is not an attribute
> of Button. You can't just add arbitrary attributes you need
> to use the ones that the object supports. You can see them
> by using help(). For example:
>
> >>> help(tk.Button)
>
> Help on class Button in module tkinter:
>
> class Button(Widget)
> | Button widget.
> |
> | Method resolution order:
> | Button
> | Widget
> | BaseWidget
> | Misc
> | Pack
> | Place
> | Grid
> | builtins.object
> |
> | Methods defined here:
> |
> | __init__(self, master=None, cnf={}, **kw)
> | Construct a button widget with the parent MASTER.
> |
> | STANDARD OPTIONS
> |
> | activebackground, activeforeground, anchor,
> | background, bitmap, borderwidth, cursor,
> | disabledforeground, font, foreground
> | highlightbackground, highlightcolor,
> | highlightthickness, image, justify,
> | padx, pady, relief, repeatdelay,
> | repeatinterval, takefocus, text,
> | textvariable, underline, wraplength
> |
> | WIDGET-SPECIFIC OPTIONS
> |
> | command, compound, default, height,
> | overrelief, state, width
> | <SNIP>
>
> Shows the valid options available.
>
>
> --
> Alan G
> Author of the Learn to Program web site
> http://www.alan-g.me.uk/
> http://www.amazon.com/author/alan_gauld
> Follow my photo-blog on Flickr at:
> http://www.flickr.com/photos/alangauldphotos
>
>
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