这是我的第一个项目，我是一个完全的初学者，所以我道歉。
我正在尝试使用GUI创建库存系统。我遇到问题的地方是处理所有数据，我在学习SQLite之前想到我应该尝试自己糟糕的数据组织，这样我对该库的必要性有了更深入的了解。目前我已经被困在搜索功能上数周。我的数据在文本文件中“组织”，它由一个包含6个变量的类组成。变量存储在文本文件中，如下所示; x1，x2，x3，x4，x5，x6。
目前我正在尝试使用正则表达式创建搜索函数，该函数可以通过搜索x1，x2或x3来查找整个类（x1-x6）。
我遇到的问题是我的搜索值（x_search_nick（x1），x_search_name（x2）或x_search_part（x3））都是由GUI内的搜索窗口中的条目定义的。当我点击搜索按钮时，我希望它在单独的窗口中显示该搜索值的整个类属性。为了使它成为一个单独的窗口，它需要是一个单独的函数，但此时需要全局定义搜索变量。当使所有搜索变量全局化时，我得到“UnboundLocalError：赋值前引用的未绑定本地错误python局部变量”，我相信因为如果使用x1，x2或x3搜索两个变量将为空？无论哪种方式，我都试过以多种不同的方式设置它，似乎无法找到正确的方法。
我在描述整个问题时也非常糟糕，所以我只是把我的代码扔出去，希望这些信息和代码更容易看到问题。随着代码我有一个文本文件Reagent_To_List.txt。这是我的第一个项目，组织，这是一个残骸。
谢谢。
from tkinter import *
import tkinter.messagebox
import re
#Tkinter Basics______________________________________________
root = Tk()
#Files to open_______________________________________________
Reagent_To_List_file = open("Reagent_To_List.txt","w")
topFrame = Frame(root)
topFrame.pack()
bottomFrame = Frame(root)
bottomFrame.pack(side=BOTTOM)
#Class_____________________________________
class Reagent:
def __init__(self, Nickname, Name, Part_Num, Lot_Num, Expiration,
Manufacteur, ):
self.Nickname = Nickname
self.Name = Name
self.Part_Num = Part_Num
self.Lot_Num = Lot_Num
self.Expiration = Expiration
self.Manufacteur = Manufacteur
#Functions_________________________________
class New_Reagent_Button_1:
def __init__(self, master):
frame = Frame(master)
frame.pack()
self.New_Reagent_button =Button(topFrame, text="New Reagent",fg="Black", width=75, height=3, relief=RAISED, bd=18,command = self.new_Reg)
self.New_Reagent_button.grid(row=0, column=0)
def new_Reg(self):
newwin = Toplevel(root)
newwin.geometry("450x500")
Enter_Nick = Label(newwin, text = "Enter Nickname: ", bd = 25)
Enter_Nick.grid(row=0, column=0)
x = Entry(newwin, bd = 5, width=30)
x.grid(row=0, column=1)
Enter_Chem_Name = Label(newwin, text="Chemical Name: ", bd = 25)
Enter_Chem_Name.grid(row=1, column=0)
x_1 = Entry(newwin, bd=5, width=30)
x_1.grid(row=1, column=1)
Enter_Part = Label(newwin, text="Part Number: ", bd=25)
Enter_Part.grid(row=2, column=0)
x_2 = Entry(newwin, bd=5, width=30)
x_2.grid(row=2, column=1)
Enter_Lot = Label(newwin, text = "Lot Number: ", bd= 25)
Enter_Lot.grid(row=3, column=0)
x_3 = Entry(newwin, bd=5, width=30)
x_3.grid(row=3, column=1)
Enter_Exp = Label(newwin, text = "Expiration Date: ", bd= 25)
Enter_Exp.grid(row=4, column=0)
x_4 = Entry(newwin, bd=5, width=30)
x_4.grid(row=4, column=1)
Enter_Manu = Label(newwin, text = "Manufacteur: ", bd= 25)
Enter_Manu.grid(row=5, column=0)
x_5 = Entry(newwin, bd=5, width=30)
x_5.grid(row=5, column=1)
def Done_Save(x):
input = x.get()
input_1 = x_1.get()
input_2 = x_2.get()
input_3 = x_3.get()
input_4 = x_4.get()
input_5 = x_5.get()
Reagent_To_List = (Reagent(x,x_1, x_2, x_3, x_4, x_5))
Reagent_To_List_file.write(str(input + ", "))
Reagent_To_List_file.write(str(input_1 + ", "))
Reagent_To_List_file.write(str(input_2 + ", "))
Reagent_To_List_file.write(str(input_3 + ", "))
Reagent_To_List_file.write(str(input_4 + ", "))
Reagent_To_List_file.write(str(input_5))
Reagent_To_List_file.write("\n")
Reagent_To_List_file.flush()
Save_New_Reg = Button(newwin, text="Done/Save", bd=5, height=2, width= 8, command= lambda: Done_Save(x))
Save_New_Reg.grid(row=6, column=0)
Done_New_Reg = Button(newwin, text ="Exit", bd = 5, height = 2, width = 8, command = newwin.destroy)
Done_New_Reg.grid(row = 6, column = 2)
newwin.mainloop()
class Search_Button:
def __init__(self, master):
frame = Frame(master)
frame.pack()
self.Search_button =Button(topFrame, text="Search For Reagent", fg="Black", width=75, height=3, relief=RAISED, bd=18, command = self.Search)
self.Search_button.grid(row=1, column=0)
def Search(self):
newwin = Toplevel(root)
newwin.geometry("610x400")
Enter_Search = Label(newwin, text="Enter\n Nickname: ", bd=25)
Enter_Search.grid(row=0, column=0)
global x_search_nick
x_search_nick = Entry(newwin, bd=5, width=50)
x_search_nick.grid(row=0, column=1)
Enter_Search = Label(newwin, text="Enter\n Chemical Name: ", bd=25)
Enter_Search.grid(row=3, column=0)
global x_search_name
x_search_name = Entry(newwin, bd=5, width=50)
x_search_name.grid(row=3, column=1)
Enter_Search = Label(newwin, text="Enter\n Part #: ", bd=25)
Enter_Search.grid(row=6, column=0)
global x_search_part
x_search_part = Entry(newwin, bd=5, width=50)
x_search_part.grid(row=6, column=1)
Done_New_Search = Button(newwin, text = "Exit", bd = 5, height = 2, width = 8, command = newwin.destroy)
Done_New_Search.grid(row = 9, column = 2)
B_Search = Button(newwin, text="Search", bd=5, height=2, width=8, command= self.Search_Function)
B_Search.grid(row=9, column=0)
def Search_Function(self):
newwin = Toplevel(root)
newwin.geometry("550x700")
Results_Header = Label(newwin, text="Search Results", font=("Times New Roman", 16), height=5, width=10)
Results_Header.grid(row=0, column=1)
Search_Results_List = Listbox(newwin, bd=3, height=20, width=50)
Search_Results_List.grid(row=10, column=4)
regex_nick = (x_search_nick.get()) + r"([a-zA-z0-9\-\/]+),\s([a-zA-z0-9\-\/]+),\s([a-zA-z0-9\-\/]+),\s([a-zA-z0-9\-\/]+),\s([a-zA-z0-9\-\/]+)"
pattern_nick = re.compile(regex_nick)
with open("Reagent_To_List.txt", "r") as f:
contents = f.read()
matches_nick = pattern_nick.finditer(contents)
for match_nick in matches_nick:
print(match_nick)
return (match_nick)
if match_nick.group(1) == x_search_nick.get():
Search_Results_List.insert(1, x_search_nick.get() + ", " + match_nick.group(2) + ", " + match_nick.group(3) + ", " + match_nick.group(4) + ", " + match_nick.group(5) + ", " + match_nick.group(6))
regex_name = (r"([a-zA-z0-9\-\/]+),\s" + x_search_name.get() + ",\s([a-zA-z0-9\-\/]+),\s([a-zA-z0-9\-\/]+),\s([a-zA-z0-9\-\/]+),\s([a-zA-z0-9\-\/]+)")
pattern_name = re.compile(regex_name)
with open("Reagent_To_List.txt", "r") as f:
contents = f.read()
matches_name = pattern_name.finditer(contents)
for match_name in matches_name:
print(match_name)
return (match_name)
if match_name.group(2) == x_search_name:
Search_Results_List.insert(1, match_name.group(1) + ", " + x_search_name.get() + ", " + match_name.group(3) + ", " + match_name.group(4) + ", " + match_name.group(5) + ", " + match_name.group(6))
regex_part = (r"([a-zA-z0-9\-\/]+),\s([a-zA-z0-9\-\/]+),\s" + (x_search_part.get()) + ",\s([a-zA-z0-9\-\/]+),\s([a-zA-z0-9\-\/]+),\s([a-zA-z0-9\-\/]+),\s([a-zA-z0-9\-\/]+)")
pattern_part = re.compile(regex_part)
with open("Reagent_To_List.txt", "r") as f:
contents = f.read()
matches_part = pattern_part.finditer(contents)
for match_part in matches_part:
print(match_part)
return (match_part)
if match_part.group(3) == x_search_part:
Search_Results_List.insert(1, match_part.group(1) + ", " + match_part.group(2) + ", " + x_search_part.get() + ", " + match_part.group(4) + ", " + match_part.group(5) + ", " + match_part.group(6))
scrollbar = Scrollbar(newwin, orient="vertical")
scrollbar.config(command=Search_Results_List.yview)
scrollbar.grid(row=10, column=5, sticky="ns")
#except:
# Error_Header = Label(newwin, text="Search Yielded No Results", width = 30, height = 20, font= ("Times New Roman",20) )
#Error_Header.grid(row=5, column=4)
#print(error)
#Buttons____________________________________
New_b = New_Reagent_Button_1(root)
Search_b = Search_Button(root)
button_Edit_Reagent = Button(topFrame, text="Edit Reagent", fg="Black", width = 75, height = 3, relief = RAISED,bd= 18)
button_Delete_Reagent = Button(topFrame, text="Delete Reagent", fg="Red", width = 75, height = 3, relief = RAISED,bd= 18)
button_See_Reagent_List = Button(topFrame, text="See Reagent List", fg="Black", width = 75, height = 3, relief = RAISED,bd= 18)
button_Check_Expired = Button(topFrame, text="Check Expired", fg="Red", width = 75, height = 3, relief = RAISED,bd= 18)
button_Done = Button(topFrame, text="Done", fg="Red", width = 75, height = 3, relief = RAISED,bd= 18,command = root.destroy)
button_Edit_Reagent.grid(row=6, column=0)
button_Delete_Reagent.grid(row=7, column=0)
button_See_Reagent_List.grid(row=9, column=0)
button_Check_Expired.grid(row=11, column=0)
button_Done.grid(row=12, column=0)
root.mainloop()
在我看来，Reagent_To_List.txt文件是在Search_Function范围之外创建的，它引起了你的问题。
如果你在txt_file中添加一个Search_Function(self, txt_file)参数并用txt_file替换函数中的所有Reagent_To_List.txt，那么调用函数Search_Function(root, "Reagent_To_List.txt")它应该工作。