python tkinter 中的部分搜索不起作用

Question

我的部分代碼有問題。 這是關於 treeview 中的部分搜索。 我在這里找到了堆棧溢出部分搜索方法，並嘗試與我的代碼一起使用。 它不起作用 - 它沒有給出任何結果。 代碼如下：

from tkinter import *
from tkinter import ttk
root = Tk()
sv = StringVar()
ids = []
names = []
def add():
    names = tree.insert("",END,values=(e0.get(),e1.get(),e2.get(),e3.get()))

for i in range(len(names)):
    ids.append(tree.insert("", "end", text=names[i]))
 
def command(*args):
    selections = []
    for i in range(len(names)):
        if entry.get() != "" and entry.get() == names[i][:len(entry.get())]:
            selections.append(ids[i])
        tree.selection_set(selections)
sv.trace("w", command)
entry = Entry(root, textvariable=sv,width=13)
entry.grid(row=2,column=1,rowspan=3,sticky=W)
e0 = Entry(root,width=15)
e0.grid(row=0,column=1,rowspan=1,sticky=W)
e1 = Entry(root,width=15)
e1.grid(row=0,column=1,rowspan=2,sticky=W)
e2 = Entry(root,width=15)
e2.grid(row=0,column=1,rowspan=3,sticky=W)
e3 = Entry(root,width=15)
e3.grid(row=0,column=1,rowspan=4,sticky=W)
 
btn1 = Button(root,text="add",width=5,command=add)
btn1.grid(row =0,column=0,rowspan=5)
lb1 = Label(root,text="serial num:")
lb1.grid(row =0,column=0,rowspan=1)
lb2 = Label(root,text="medicine\nname ")
lb2.grid(row =0,column=0,rowspan=2)
lb3 = Label(root,text="quatity")
lb3.grid(row =0,column=0,rowspan=3)
lb4 = Label(root,text="expiry Date")
lb4.grid(row =0,column=0,rowspan=4)
lb4 = Label(root,text="search box")
lb4.grid(row =1,column=0,rowspan=6)
#treeview
tree = ttk.Treeview(root,height=25)
tree["columns"]=("one","two","three","four")
tree.column("one",width=120)
tree.column("two",width=160)
tree.column("three",width=130)
tree.column("four",width=160)
tree.heading("one", text="Numer seryjny leku")
tree.heading("two", text="Nazwa Leku")
tree.heading("three", text="Ampułki/Tabletki")
tree.heading("four",text="Data ważności")
tree["show"]="headings"
tree.grid(row=0,column=2,rowspan=6,pady=20)
root.geometry("840x580")
root.mainloop()

Answer 1

未定義變量names 。 您應該在代碼的開頭添加與以下行類似的行：

names = []

另一方面，您必須如下聲明命令 function 以使其工作，因為跟蹤回調需要至少三個 arguments：

def command(*args):

順便說一句，如果您不想丟失變量names中的數據，我會以面向類的方式轉換您的代碼，例如：

from tkinter import *
from tkinter import ttk
root = Tk()
sv = StringVar()
ids = []


class Tree():
    def __init__(self, root):
        self.names = []
        sv.trace("w", self.command)
        self.entry = Entry(root, textvariable=sv, width=13)
        self.entry.grid(row=2,column=1,rowspan=3,sticky=W)
        self.e0 = Entry(root,width=15)
        self.e0.grid(row=0,column=1,rowspan=1,sticky=W)
        self.e1 = Entry(root,width=15)
        self.e1.grid(row=0,column=1,rowspan=2,sticky=W)
        self.e2 = Entry(root,width=15)
        self.e2.grid(row=0,column=1,rowspan=3,sticky=W)
        self.e3 = Entry(root,width=15)
        self.e3.grid(row=0,column=1,rowspan=4,sticky=W)
        
        self.btn1 = Button(root,text="add",width=5,command=self.add)
        self.btn1.grid(row =0,column=0,rowspan=5)
        self.lb1 = Label(root,text="serial num:")
        self.lb1.grid(row =0,column=0,rowspan=1)
        self.lb2 = Label(root,text="medicine\nname ")
        self.lb2.grid(row =0,column=0,rowspan=2)
        self.lb3 = Label(root,text="quatity")
        self.lb3.grid(row =0,column=0,rowspan=3)
        self.lb4 = Label(root,text="expiry Date")
        self.lb4.grid(row =0,column=0,rowspan=4)
        self.lb4 = Label(root,text="search box")
        self.lb4.grid(row =1,column=0,rowspan=6)
        #treeview
        self.tree = ttk.Treeview(root,height=25)
        self.tree["columns"]=("one","two","three","four")
        self.tree.column("one",width=120)
        self.tree.column("two",width=160)
        self.tree.column("three",width=130)
        self.tree.column("four",width=160)
        self.tree.heading("one", text="Numer seryjny leku")
        self.tree.heading("two", text="Nazwa Leku")
        self.tree.heading("three", text="Ampułki/Tabletki")
        self.tree.heading("four",text="Data ważności")
        self.tree["show"]="headings"
        self.tree.grid(row=0,column=2,rowspan=6,pady=20)
    
    def add(self):
        self.names = self.tree.insert("",END,values=(self.e0.get(),self.e1.get(),self.e2.get(),self.e3.get()))

        for i in range(len(self.names)):
            ids.append(self.tree.insert("", "end", text=self.names[i]))
    
    def command(self, *args):
        selections = []
        for i in range(len(self.names)):
            if self.entry.get() != "" and self.entry.get() == self.names[i][:len(self.entry.get())]:
                selections.append(ids[i])
            self.tree.selection_set(selections)

tree = Tree(root)
root.geometry("840x580")
root.mainloop()