一切正常，当我按下键时，输入行的最后一个字符entry被删除←，在不知道发生了什么并且出现这样的错误之后，如何修复它，它甚至意味着什么？неверный индекс записи "end-2c，在此之前为什么它是真的？是什么改变让他不忠？也许有人会看到，我显然错过了一些东西
程序代码：
from tkinter import *
import tkinter as tk
# Создания кона приложения
root = Tk()
# Название окна
root.title('Python')
# Размеры окна
root.geometry('205x298')
# Запрет пользователя на изменение рамеров окна
root.resizable(width = False, height = False)
def Calculator():
while True:
term = Expression.get("1.0", END)
term = term[0:-1]
long_term = len(term)
# Все индексы символов введеных пользователем
index = []
# Проводим проверку ввода пользователя
if long_term > 0:
# Получаем индекс каждого введеного пользователем символа
while long_term > 0:
long_term = long_term - 1
index.insert(0,long_term)
elif long_term == 0:
break
# Все элементы строки введеной пользователем
term_list = [term[i] for i in index]
# Выход из функции если в поле ввода нет арифметических знаков
if set(["+" ,"-" ,"*" ,"/"]).isdisjoint(term_list) == True:
print('Не найденно арифметическое действие!')
Expression.delete("1.0", END)
break
return term_list
break
def Arithmetic_action_Plus():
term = Decision.get()
Expression.insert(END, term)
Expression.insert(END, ' ' + '+' + ' ')
Decision.delete(0, END)
def Plus_Act():
Arithmetic_action_Plus()
Calculator()
def Arithmetic_action_Minus():
term = Decision.get()
Expression.insert(END, term)
Expression.insert(END, ' ' + '-' + ' ')
Decision.delete(0, END)
def Minus_Act():
Arithmetic_action_Minus()
Calculator()
def Arithmetic_action_Mult():
term = Decision.get()
Expression.insert(END, term)
Expression.insert(END, ' ' + '*' + ' ')
Decision.delete(0, END)
def Mult_Act():
Arithmetic_action_Mult()
Calculator()
def Clear_fields_Act():
Expression.delete("1.0", END)
Decision.delete(0, END)
def Arithmetic_action_Division():
term = Decision.get()
Expression.insert(END, term)
Expression.insert(END, ' ' + '/' + ' ')
Decision.delete(0, END)
def Division_Act():
Arithmetic_action_Division()
Calculator()
def Equally_Act():
while True:
term = Decision.get()
Expression.insert(END, term)
term_list = Calculator()
# Выход из функции если поле ввода пусто
if term_list == None:
break
# Список значений ариф.знаков
variable_arithmetic = []
# Список чисел и ариф.знаков строки ввода
Input_line_numbers = []
# Список индексов списка чисел и ариф.знаков
index_arithmetic = []
# Создание списка с конкатенированными числами и ариф.знаками
for n in term_list.copy():
if n in ("+", "-", "*", "/"):
#Узнаем индекс ариф.знака
index = term_list.index(n)
#Делаем вырезку в отдельный список от первого знака и до знака ариф.
Input_line_numbers.append(''.join(term_list[0:index]))
#Удоляем часть списка от первого знака и до знака арифметики
del term_list[0:index]
#Вырезаем в отдельный список сам знак арифметики
Input_line_numbers.append(''.join(term_list[0]))--
#Удоляем знак арифметики
del term_list[0]
#Вызераем в отдельный список последнее число
Input_line_numbers.append(''.join(term_list[0:]))
#Удоляем последнее число из списка
del term_list[0:]
for symbol in Input_line_numbers.copy():
if symbol in ("+"):
num1 = ''.join(Input_line_numbers[0:1])
num2 = ''.join(Input_line_numbers[2:3])
if not set(".").isdisjoint(num1) == True or\
not set(".").isdisjoint(num2) == True:
result = float(num1) + float(num2)
result = round(result, 1)
result = str(result)
else:
try:
result = int(num1) + int(num2)
except ValueError:
print('\n\n Нет числа после ариф.действия!')
return 'break'
result = round(result)
result = str(result)
del Input_line_numbers[0:3]
Input_line_numbers.insert(0,result)
if symbol in ("-"):
num1 = ''.join(Input_line_numbers[0:1])
num2 = ''.join(Input_line_numbers[2:3])
if not set(".").isdisjoint(num1) == True or\
not set(".").isdisjoint(num2) == True:
result = float(num1) - float(num2)
result = round(result, 1)
result = str(result)
else:
try:
result = int(num1) - int(num2)
except ValueError:
print('\n\n Нет числа после ариф.действия!')
return 'break'
result = round(result)
result = str(result)
del Input_line_numbers[0:3]
Input_line_numbers.insert(0,result)
if symbol in ("*"):
num1 = ''.join(Input_line_numbers[0:1])
num2 = ''.join(Input_line_numbers[2:3])
if not set(".").isdisjoint(num1) == True or\
not set(".").isdisjoint(num2) == True:
result = float(num1) * float(num2)
result = round(result, 2)
result = str(result)
else:
try:
result = int(num1) * int(num2)
except ValueError:
print('\n\n Нет числа после ариф.действия!')
return 'break'
result = round(result)
result = str(result)
del Input_line_numbers[0:3]
Input_line_numbers.insert(0,result)
if symbol in ("/"):
num1 = ''.join(Input_line_numbers[0:1])
num2 = ''.join(Input_line_numbers[2:3])
if not set(".").isdisjoint(num1) == True or\
not set(".").isdisjoint(num2) == True:
result = float(num1) / float(num2)
result = str(result)
else:
try:
result = int(num1) // int(num2)
except ValueError:
print('\n\n Нет числа после ариф.действия!')
return 'break'
result = round(result)
result = str(result)
del Input_line_numbers[0:3]
Input_line_numbers.insert(0,result)
Decision.delete(0, END)
Decision.insert(END, result)
Expression.delete("1.0", END)
break
#-------------------------------------------------------------------------------
# Создаем фреймы
Expression_line = Frame(root, background='olivedrab', # Выражение
width = 205, height = 44)
Decision_line = Frame(root, background='olivedrab', # Решение
width = 205, height = 33)
First_line = Frame(root, background='olivedrab', # 7 8 9 +
width = 205, height = 44)
Second_line = Frame(root, background='olivedrab', # 4 5 6 -
width = 205, height = 44)
Third_line = Frame(root, background='olivedrab', # 1 2 3 *
width = 205, height = 44)
Fourth_line = Frame(root, background='olivedrab', # ← 0 c /
width = 205, height = 44)
Fifth_line = Frame(root, background='olivedrab', # = ,
width = 205, height = 44)
#-------------------------------------------------------------------------------
#_Выражение_____________________________________________________________________
Expression = Text(Expression_line, background = "gainsboro", font = "Arial 9",
foreground = "black", width = 25)
def check_keys(event):
if event.char.isalpha() or (event.state & 4 and event.keysym == "v"):
return "break"
Expression.bind("<Key>", check_keys)
#-------------------------------------------------------------------------------
#_Решение_______________________________________________________________________
Decision = Entry(Decision_line, background = "gainsboro",
foreground = "black", font = "Arial 13", width = 17)
Decision.bind("<Key>", check_keys)
#-------------------------------------------------------------------------------
#_7_____________________________________________________________________________
Seven = Button(First_line, text = "7", background = "#444",
foreground = "white", font = "Arial 14", width = 3,
command = lambda: Decision.insert(END, "7"))
#_8_____________________________________________________________________________
Eight = Button(First_line, text = "8", background = "#444",
foreground = "white", font = "Arial 14", width = 3,
command = lambda: Decision.insert(END, "8"))
#_9_____________________________________________________________________________
Nine = Button(First_line, text = "9", background = "#444",
foreground = "white", font = "Arial 14", width = 3,
command = lambda: Decision.insert(END, "9"))
#_+_____________________________________________________________________________
# Создание кнопки +
Plus = Button(First_line, # Нахождение во фрейме
text = "+", # Текст кнопки
background = "#555", # Фоновый цвет кнопки
foreground = "white", # Цвет текста
font = "Arial 12", # Высота шрифта
width = 3, # Высота кнопки
height = 1, # Ширина кнопки
command = Plus_Act # Функция кнопки
)
#-------------------------------------------------------------------------------
#_4_____________________________________________________________________________
Four = Button(Second_line, text = "4", background = "#444",
foreground = "white", font = "Arial 14", width = 3,
command = lambda: Decision.insert(END, "4"))
#_5_____________________________________________________________________________
Five = Button(Second_line, text = "5", background = "#444",
foreground = "white", font = "Arial 14", width = 3,
command = lambda: Decision.insert(END, "5"))
#_6_____________________________________________________________________________
Six = Button(Second_line, text = "6", background = "#444",
foreground = "white", font = "Arial 14", width = 3,
command = lambda: Decision.insert(END, "6"))
#_-_____________________________________________________________________________
Minus = Button(Second_line, text = " - ", background = "#555",
foreground = "white", font = "Arial 12", width = 3,
height = 1, command = Minus_Act)
#-------------------------------------------------------------------------------
#_1______________________________________________________________________________
One = Button(Third_line, text = "1", background = "#444",
foreground = "white", font = "Arial 14", width = 3,
command = lambda: Decision.insert(END, "1"))
#_2______________________________________________________________________________
Two = Button(Third_line, text = "2", background = "#444",
foreground = "white", font = "Arial 14", width = 3,
command = lambda: Decision.insert(END, "2"))
#_3______________________________________________________________________________
Three = Button(Third_line, text = "3", background = "#444",
foreground = "white", font = "Arial 14", width = 3,
command = lambda: Decision.insert(END, "3"))
#_*______________________________________________________________________________
Mult = Button(Third_line, text = " * ", background = "#555",
foreground = "white", font = "Arial 12", width = 3,
command = Mult_Act)
#--------------------------------------------------------------------------------
#_←_____________________________________________________________________________
Clear_symbol = Button(Fourth_line, text = "←", background = "#555",
foreground = "white",font = "Arial 14", width = 3,
command = lambda: Decision.delete("end-3c"))
#_0_____________________________________________________________________________
Zero = Button(Fourth_line, text = "0", background = "#444",
foreground = "white",font = "Arial 14", width = 3,
command = lambda: Decision.insert(END, "0"))
#_с_____________________________________________________________________________
Clear_fields = Button(Fourth_line, text = "с", background = "#555",
foreground = "white", font = "Arial 14", width = 3,
command = Clear_fields_Act)
#_/_____________________________________________________________________________
Division = Button(Fourth_line, text = " / ", background = "#555",
foreground = "white", font = "Arial 12", width = 3,
command = Division_Act)
#-------------------------------------------------------------------------------
#_=_____________________________________________________________________________
Pixel_Virtual = tk.PhotoImage(width = 1)
Equally = Button(Fifth_line, text = "=", background = "#555",
command = Equally_Act, image = Pixel_Virtual, compound = 'c',
foreground = "white", font = "Arial 12", width = 147,)
#_,_____________________________________________________________________________
Comma = Button(Fifth_line, text = ".", background = "#555",
foreground = "white", font = "Arial 12", width = 3,
command = lambda: Decision.insert(END, "."))
#-------------------------------------------------------------------------------
#-------------------------------------------------------------------------------
# Указываем выравнивание обьекта во фрейме и его отображение в окне
Expression.pack(side = LEFT, padx = 2, pady = 2) # Выражение
Decision.pack(side = LEFT, padx = 2, pady = 2) # Решение
Seven.pack(side = LEFT, padx = 2, pady = 2) # 7
Eight.pack(side = LEFT, padx = 2, pady = 2) # 8
Nine.pack(side = LEFT, padx = 2, pady = 2) # 9
Plus.pack(side = LEFT, padx = 2, pady = 2) # +
Four.pack(side = LEFT, padx = 2, pady = 2) # 4
Five.pack(side = LEFT, padx = 2, pady = 2) # 5
Six.pack(side = LEFT, padx = 2, pady = 2) # 6
Minus.pack(side = LEFT, padx = 2, pady = 2) # -
One.pack(side = LEFT, padx = 2, pady = 2) # 1
Two.pack(side = LEFT, padx = 2, pady = 2) # 2
Three.pack(side = LEFT, padx = 2, pady = 2) # 3
Mult.pack(side = LEFT, padx = 2, pady = 2) # *
Clear_symbol.pack(side = LEFT, padx = 2, pady = 2) # ←
Zero.pack(side = LEFT, padx = 2, pady = 2) # 0
Clear_fields.pack(side = LEFT, padx = 2, pady = 2) # c
Division.pack(side = LEFT, padx = 2, pady = 2) # /
Equally.pack(side = LEFT, padx = 2, pady = 2,
expand = 1, fill = Y) # =
Comma.pack(side = BOTTOM, padx = 2, pady = 2) # ,
#-------------------------------------------------------------------------------
# Включаем отображение фрейма в окне
Expression_line.pack(anchor = W) # N - Север ↑
Expression_line.pack_propagate(False) # S - Юг ↓
Decision_line.pack(anchor = W) # W - Запад ←
Decision_line.pack_propagate(False) # E - Восток →
First_line.pack(anchor = W)
First_line.pack_propagate(False)
Second_line.pack(anchor = W)
Second_line.pack_propagate(False)
Third_line.pack(anchor = W)
Third_line.pack_propagate(False)
Fourth_line.pack(anchor = W)
Fourth_line.pack_propagate(False)
Fifth_line.pack(anchor = W)
Fifth_line.pack_propagate(False)
# Реализация бесконечного цикла окна (работа окна)
root.mainloop()
根据经验确定删除后的最后一个字符
.delete("end-2c")（如本答案中的示例）适用于类对象Text（多行文本字段），但不适用于对象Entry（单行文本字段） - 这正是您的案子：要从 中删除最后一个字符
Entry，您需要将要删除的字符的索引指定为数字。为此，需要从字段中获取文本，获取其长度，减1（最后一个字符的索引不小于长度1），例如：删除最后一个字符的另一个选项（取自此处）：