如果选中复选框，则在列表中添加值

Question

我正在制作一个小程序，我有2个复选框（text1和text2）。 我想将值（text1和text2）附加到List，如果选中复选框。 我想打印列表[text1，text2]

from tkinter import *

myApp = Tk()
myApp.title("GUI app")
myApp.geometry("300x500")

List = []
varList = []

var1 = IntVar()
Checkbutton1 = Checkbutton(myApp, text="Text1", variable=var1,
                           onvalue=1, offvalue=0)
Checkbutton1.grid(row=0, column=1, sticky=W)

var2 = IntVar()
Checkbutton2=Checkbutton(myApp, text="Text2", variable=var2,
                         onvalue=1, offvalue=0)
Checkbutton2.grid(row=1, column=1,sticky=W)

varList.append(var1)
varList.append(var2)

def addtolist():
    for item in varList:
        if item.get() == 1:
            List.append(item)
            print(List)

b1 = Button(myApp, text="Add", command=addtolist)
b1.grid(row=1, column=2)

mainloop()

Answer 1

使用> payments@1.0.0 start /Users/shawnmurray > node app.js module.js:538 throw err; ^ Error: Cannot find module '/Users/shawnmurray/app.js' at Function.Module._resolveFilename (module.js:536:15) at Function.Module._load (module.js:466:25) at Function.Module.runMain (module.js:676:10) at startup (bootstrap_node.js:187:16) at bootstrap_node.js:608:3 npm ERR! code ELIFECYCLE npm ERR! errno 1 npm ERR! payments@1.0.0 start: `node app.js` npm ERR! Exit status 1 npm ERR! npm ERR! Failed at the payments@1.0.0 start script. npm ERR! This is probably not a problem with npm. There is likely additional logging output above. npm ERR! A complete log of this run can be found in: npm ERR! /Users/shawnmurray/.npm/_logs/2017-11-26T01_03_27_930Z-debug.log shawns-iMac:~ shawnmurray$ node -version node: bad option: -version shawns-iMac:~ shawnmurray$ node --version v8.9.1 和onvalue="Text", offvalue=""，然后var1 = StringVar()将返回item.get()或空字符串。

"Text"

Answer 2

修改furas代码以便更容易创建列表

from tkinter import *


def addtolist():
    global List

    List = []
    for item in varList:
        if item.get() != "":
            List.append(item.get())
    print(List)


List = []
varList = []
myApp = Tk()
myApp.title("GUI app")
myApp.geometry("300x500")


class Check:
    x = 0
    def __init__(self, lbl):
        self.var = StringVar()
        self.cb = Checkbutton(myApp, text=lbl, variable=self.var,
                              onvalue=lbl, offvalue="")
        self.cb.grid(row=Check.x, column=1, sticky=W)
        Check.x += 1
        varList.append(self.var)


Check("Paul Weller")
Check("Nancy Reagan")
Check("Richard Gere")

b1 = Button(myApp, text="Add", command=addtolist)
b1.grid(row=1, column=2)