问题
i a beginner and i am trying to make a blood sugar tracking application using python Tkinter and Sqlite, so the problem is that after "selecting" a row from treeview widget and "updating" its values the Blue highlight no longer exists but the data is stored and if the "UPDATE" button/function is clicked again even without selecting a row from treeview the values on the previously selected row get updated.
import numpy as np
from tkinter import *
from tkinter import messagebox
from tkinter import ttk
import datetime
from db import Database
db = Database('sugar.db')
main = Tk()
main.title('Blood Sugar Tracker')
width_of_main = 840
height_of_main = 420
main.resizable(width=True, height =False)
screen_width = main.winfo_screenwidth()
screen_height = main.winfo_screenheight()
x_co = (screen_width/2)-(width_of_main/2)
y_co = (screen_height/2) - (height_of_main/2)
main.geometry( "%dx%d+%d+%d" % (width_of_main, height_of_main , x_co,y_co))
####fuctions###
def populate_list():
table_list.delete(*table_list.get_children())
for row in db.fetch():
table_list.insert("","end", values = row)
def add_entry():
try:
comment = comment_entry.get("1.0","end-1c")
if fbs.get()=='' and ppbs.get()=='' and insulin.get()=='' and comment=="":
messagebox.showerror('Required Fields', 'Please entry atleast'"\n"'ONE'"\n"'entry field')
else:
db.insert(date,fbs.get(), ppbs.get(),insulin.get(),comment)
table_list.delete(*table_list.get_children())
table_list.insert("", "end",(date,fbs.get(), ppbs.get(),insulin.get(),comment))
clear_fields()
populate_list()
except ValueError:
messagebox.showerror('Entry field error','Enter ONLY Numerals in '"\n"'Fasting/Before food Blood sugar level'"\n"'After Food sugar levels'"\n"'Insulin Units')
def update_entry():
try:
comment = comment_entry.get("1.0","end-1c")
if fbs.get()=='' and ppbs.get()=='' and insulin.get()=='' and comment=="":
messagebox.showerror('Required Fields', 'Please entry atleast'"\n"'ONE'"\n"'entry field')
else:
db.update(selected[0],fbs.get(), ppbs.get(),insulin.get(),comment)
clear_fields()
populate_list()
except ValueError:
messagebox.showerror('Entry field error','Enter ONLY Numerals in '"\n"'Fasting/Before food Blood sugar level'"\n"'After Food sugar levels'"\n"'Insulin Units')
except NameError:
pass
def selection(event):
try:
global selected
index = table_list.focus()
selected = (table_list.item(index)).get("values")
fbs_entry.delete(0,END)
fbs_entry.insert(END, selected[2])
ppbs_entry.delete(0,END)
ppbs_entry.insert(END, selected[3])
insulin_entry.delete(0,END)
insulin_entry.insert(END, selected[4])
comment_entry.delete('1.0',END)
comment_entry.insert(END, selected[5])
except IndexError:
pass
def remove_entry():
try:
db.remove(selected[0])
clear_fields()
populate_list()
except:
pass
def clear_fields():
fbs_entry.delete(0,END)
ppbs_entry.delete(0,END)
insulin_entry.delete(0,END)
comment_entry.delete('1.0',END)
####blood gloucose levels####
###frames###
frame_top = LabelFrame(main,)
frame_top.grid(row =0, column = 0, columnspan = 4, padx=10, pady = 6)
frame_bottom = LabelFrame(main,)
frame_bottom.grid(row=2,column=0, columnspan =6, padx=10, pady = 12)
###fbs###
fbs = StringVar()
fbs_label= Label(frame_top, text = 'Fasting/Before food'"\n"'Blood Sugar levels')
fbs_label.grid(row =0,column=0)
fbs_entry = Entry(frame_top,textvariable=fbs, width=16,)
fbs_entry.grid(row=0,column=1, padx=10)
###insulin ###
insulin = StringVar()
insulin_label = Label(frame_top, text = 'Insulin Units')
insulin_label.grid(row=0,column = 2)
insulin_entry =Entry(frame_top,textvariable = insulin, width = 16)
insulin_entry.grid(row=0,column=3, padx = 10)
###ppbs###
ppbs =StringVar()
ppbs_label=Label(frame_top,text ='2hrs After food'"\n"'Blood sugar levels')
ppbs_label.grid(row=0,column=4)
ppbs_entry=Entry(frame_top,textvariable = ppbs,width=16)
ppbs_entry.grid(row =0,column=5,padx=10)
####buttons###
add_btn=Button(main, text = 'Add Entry', width=25, command = add_entry )
add_btn.grid(row=1, column=2)
update_btn=Button(main, text = 'Update Entry', width=11,command = update_entry)
update_btn.grid(row=1, column=1 )
remove_btn=Button(main, text = 'Remove Entry', width=12,command = remove_entry )
remove_btn.grid(row=1, column=0 )
clear_btn=Button(main, text = 'Clear fields', width=10,command = clear_fields )
clear_btn.grid(row=1, column=3,sticky = W, padx=(80,0))
####comment###
comment_label = Label(frame_bottom, text = 'Comments\Remarks:')
comment_label.grid(row = 1,column = 2,sticky=W,padx = (15,0))
comment_entry = Text(frame_bottom, width =30, height=12)
comment_entry.grid(row=2,column =2,sticky=W+S,padx = (15,0))
###table###
records_table = Label(frame_bottom, text='Records Table')
records_table.grid(row=1,column =0,)
table_list = ttk.Treeview(frame_bottom, columns =( 'id','date','fbs','ppbs','insulin','comment'), show = 'headings', height = 11)
table_list.heading("#1", text = "SL.no")
table_list.column("#1", width =50)
table_list.heading("#2", text = "Date")
table_list.column("#2", width= 120)
table_list.heading("#3", text = "FBS")
table_list.column("#3", width= 60)
table_list.heading("#4", text = "PPBS")
table_list.column("#4", width= 60)
table_list.heading("#5", text = "Insulin")
table_list.column("#5", width= 60)
table_list.heading("#6", text = "Comment")
table_list.column("#6", width= 100)
table_list.grid(row=2, column =0, rowspan=1,sticky= W, pady= (10,0), padx=(20,0))
##bind selection##
table_list.bind('<ButtonRelease-1>', selection)
###created###
date = str(datetime.datetime.today().strftime("%y-%m-%d, %H:%M"))
###scorllbar###
scrollbar =Scrollbar(frame_bottom)
scrollbar.grid(row=2,column=1, rowspan = 1, sticky=N+S)
###set scrollbar to tabel###
table_list.configure(yscrollcommand=scrollbar.set)
scrollbar.configure(command = table_list.yview)
populate_list()
main.mainloop()
this is the main Tkinter python file. and the below one is Sqlite file.
import sqlite3
class Database:
def __init__(self,db):
self.conn=sqlite3.connect(db)
self.cur=self.conn.cursor()
self.cur.execute('''CREATE TABLE IF NOT EXISTS sugarvalue (id
INTEGER PRIMARY KEY,date text,fbs real,ppbs real,insulin real,
comment text)''')
self.conn.commit()
def fetch(self):
self.cur.execute("SELECT * FROM sugarvalue")
rows=self.cur.fetchall()
return rows
def insert(self,date,fbs,ppbs,insulin,comment):
self.cur.execute("INSERT INTO sugarvalue VALUES(NULL,:date,:fbs,:ppbs,:insulin,:comment)",
{'date':date,'fbs':fbs,'ppbs':ppbs,'insulin':insulin, 'comment':comment})
self.conn.commit()
def remove(self,id):
self.cur.execute("DELETE FROM sugarvalue WHERE id=?",(id,))
self.conn.commit()
def update(self,id,fbs,ppbs,insulin,comment):
self.cur.execute('''UPDATE sugarvalue SET fbs=:fbs, ppbs=:ppbs, insulin=:insulin,comment=:comment WHERE id=:id''',
{'fbs':fbs,'ppbs':ppbs,'insulin':insulin,'comment':comment ,'id':id})
self.conn.commit()
def __del__(self):
self.conn.close()
to show you the problem i have uploaded a video on youtube showing this. https://youtu.be/2-hgG6gX364 this app still is under construction. and thank you for your time
来源：https://stackoverflow.com/questions/64060874/update-flaw-in-my-python-tkinter-sqlite-application