2011/8/22 守株待兔 <1248283...@qq.com>:
> from Tkinter import *
> fields = 'Name', 'Job', 'Pay'
>
> def fetch(event,entries):
> for entry in entries:
> print 'Input => "%s"' % entry.get() # get text
> print event.widget
>
>
> def makeform(root, fields):
> entries = []
> for field in fields:
> row = Frame(root) # make a new row
> lab = Label(row, width=5, text=field) # add label, entry
> ent = Entry(row)
> row.pack(side=TOP, fill=X) # pack row on top
> lab.pack(side=LEFT)
> ent.pack(side=RIGHT, expand=YES, fill=X) # grow horizontal
> entries.append(ent)
> return entries
>
> if __name__ == '__main__':
> root = Tk()
> ents = makeform(root, fields)
> root.bind('<Return>', lambda event,entries=ents: fetch(event,entries))
> Button(root, text='Fetch', command= lambda event:fetch(event,entries)).pack(side=LEFT)
> root.mainloop()
>
> when you run it ,press enter ,you can get the value in the entry;when you
> click the Button(Fetch),there is a wrong output ,i can't revise it,i know
> it is the 26 can't run ,how to fix it ?
>
> Button(root, text='Fetch', command= lambda event:fetch(event,entries)).pack(side=LEFT)
Problem 1: `entries` is undefined within the scope of the lambda; it's
not a parameter of the lambda, nor is it defined in any outer scope
that encloses the lambda. This will lead to a NameError. `ents` is /
would be within scope however...(*wink*)
Problem 2: Based on quick experimentation, Tkinter does not pass
`command` any arguments, yet your lambda has 1 required argument
(namely, `event`). This will cause a run-time error when the lambda is
called.
That should be enough to get you started.
Cheers,
Chris
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