Python implements simple information survey desktop software (GUI)

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1. Enter the name

code show as below:

#输入名字
Label(F1,text='你的名字？').pack() 
nameVar = StringVar()
nameVar.set("名字")
#输入 Entry
Entry(F1,textvariable=nameVar,width=15).pack()

2. Enter age

code show as below:

#输入年龄
def Digital(content):
    if content.isdigit() or content =='':
        return True
    else
        return False
# 将函数Digital包装成app里的dig_in  必须要做的
dig_in = app.register(Digital)

Label(F1,text='你的年龄？').pack() 
ageVar = StringVar()
ageVar.set("18")
#设置只允许数字输入
#%P进行实时监测
Entry(F1,textvariable=ageVar,width=15,validate='key'，validatecommand=(dig_in,'%P')).pack()

Click: Detailed effect display of attributes used in Entry

:

Three, single-select Radiobutton

code show as below:

#单选
langs = ['Python','Java','C/C++','Go','PHP','Ruby','Node.js']
Label(F1,text='你最喜欢哪一门编程语言？ 单选').pack()

bestVar = IntVar() #声明bestVar 是tkinter里面的一个整型变量
bestVar.set(0) #默认喜欢第0个
#把所有radiobutton加进来
for i in range(len(langs)):
    Radiobutton(F1,text=langs[i],variable=bestVar,value=i).pack()

In order to achieve its "single selection" behavior, ensure that the variable options of all buttons in a group are usedThe same variableAnd use the value option to specify what value each button represents.

Modify the code to align it to the left

for i in range(len(langs)):
    Radiobutton(F1,text=langs[i],variable=bestVar,value=i).pack(anchor=W)

Click: Detailed explanation of the attributes used in Radiobutton

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Four, multi-select Checkbutton

code show as below:

#多选
Label(F1,text='你想学习哪些编程语言？ 多选').pack()
selectVar = []
for lang in langs:
    selectVar.append(IntVar())
    Checkbutton(F1,text=lang,variable=selectVar[-1]).pack(anchor=W)

Click: Detailed explanation of the attributes used in the Checkbutton

Five, submit and exit buttons

def callback():
    name = nameVar.get()
    age = ageVar.get()
    best = langs[bestVar.get()]
    selects = []
    for i in range(len(selectVar)):
        # 0 选 1 没选
        if selectVar[i].get() == 1:
            selects.append(langs[i])
    string ='你的名字：'+name+'\n'
    string +='你的年龄:'+age+'\n'
    string +='你最喜欢哪一门编程语言+'+best+'\n'
    string +='你最想学的编程语言：'+''.join(selects)+'\n'

    messagebox.showinfo('确认你的信息',string)
    nameVar.set('')
    ageVar.set('')
#按键
Button(F1,text='提交',command=callback).pack(side=LEFT,padx='10',pady='10')
Button(F1,text='退出',command=app.quit).pack(side=RIGHT,padx='10',pady='10')

to sum up

Question 1: IntVar() and StgringVar
are both owned by tkinter
IntVar() in tk represents an integer value, StringVar represents a variable value
For example, a=IntVar() means to tell the compiler that a is an integer. It is
like declaring a variable in python and assigning it to a number. For example, a = 123 means a is an integer

v[-1]  #表示列表的最后一个元素.
v=[1,2,3,4]
v[-1] == 4
v[-2] == 3