from tkinter import *
from tkinter.filedialog import askopenfilename
import shelve

root = Tk()
shelvename = askopenfilename().split('.')[0]

root.title(shelvename.split('/')[-1])
db = shelve.open(shelvename)
rec = 0
dbkeys = list(db.keys())
record = db[dbkeys[rec]]
fields = tuple(record.__dict__.keys())
form = Frame(root)
form.pack()
global entries
entries ={}

lab = Label(form, text="key")
ent = Entry(form)
lab.grid(row=0, sticky = E)
ent.grid(row=0, column=1)
entries['key'] = ent


for (ix,label) in enumerate(fields):
    lab = Label(form, text=label)
    ent = Entry(form)
    lab.grid(row=ix+1, sticky = E)
    ent.grid(row=ix+1, column=1)
    entries[label] = ent

Button(root, text='<<', command = (lambda: ShowRec('-'))).pack(side=LEFT)
Button(root, text='>>', command = (lambda: '+'))).pack(side=RIGHT)
Button(root, text='Update', command = (lambda: updateRecord())).pack(side=LEFT)
Button(root, text='Delete', command = (lambda: deleteRecord())).pack(side=RIGHT)
Button(root, text='Clear', command = (lambda: clearRec())).pack(fill=X)