问题描述
我创建了一个温度转换器程序，其中来自条目小部件的计算温度显示在单独的标签中，我需要做的是获取转换后的变量并将其放入列表中。
我认为将连接的条目小部件连接到标签小部件可以在它们连接的地方工作，因此我可以使用 .get 方法获取变量，但这看起来非常混乱。 我还有其他方法可以继续这个吗？
这是我的第一篇文章，我是 Python 的初学者，如果代码看起来很乱并且我包含了太多的代码，我很抱歉。
data = []
tempVal = "Celcius"
def store_temp(sel_temp):
global tempVal
tempVal = sel_temp
class Calculator:
def __init__(self, num_a, num_b):
self.num_a= num_a
self.num_b = num_b
def convert(self):
if tempVal == 'Fahrenheit':
return float((float(self.num_a) - 32)* 5 / 9)
if tempVal == 'Celcius':
return float((float(self.num_a) * 9/ 5) + 32)
def display_add(entry_numa,entry_numb,label_answer):
#get the value from entry_numa
num_a = entry_numa.get()
num_b = entry_numb.get()
num_a = str(num_a)
num_b = str(num_b)
#create an object
global data
calc = Calculator(num_a,num_b)
label_answer['text'] = calc.convert()
data += [calc]
def calc_history():
global data
#creat e another window
window_calc_list = Tk()
window_calc_list.geometry("400x200")
#create a listbox
listbox_calc_list = Listbox(window_calc_list, width= 300)
listbox_calc_list.pack()
listbox_calc_list.insert(END, "list of data")
for info in data:
listbox_calc_list.insert(END, str(info.num_a) + " " + str(info.num_b) + " " )
window_calc_list.mainloop()
def main():
window = Tk()
window.geometry("500x150")
validate_letter = window.register(only_letters)
validate_nb = window.register(only_numbers_max_3)
label = Label(window, width = 30, background = 'lightblue', text='enter temperature, only numbers')
label.grid(row=0, column=0)
entry_numa = Entry(window, width = 30, validate="key", validatecommand=(validate_nb, '%d', '%P'))
entry_numa.grid(row = 0, column = 1)
#create another label and entry object for num_b
label_numb = Label(window, width = 30, background = 'lightblue', text='enter location, only letters')
label_numb.grid(row=1, column=0)
entry_numb = Entry(window, width = 30, validate="key", validatecommand=(validate_letter, '%d', '%S'))
entry_numb.grid(row = 1, column = 1)
#create another label to display answer
label_answer = Label(window, width = 30, background = 'lightyellow')
label_answer.grid(row = 2, column = 1)
entry_answer = Entry(window, width = 30)
entry_answer.grid(row = 2, column = 0)
button_add = Button(window, text = "ADD", command = lambda: display_add(entry_numa,entry_numb,label_answer))
button_add.grid(row=3, column = 0)
button_delete = Button(window, text = "DELETE", command = lambda: delete_data(data))
button_delete.grid(row=3, column = 2)
#create another button to display all previous calculations
button_display = Button(window,text = "calc_history", command = lambda: calc_history())
button_display.grid(row=3, column = 1)
var = StringVar()
dropDownList = ["Celcius", "Fahrenheit"]
dropdown = OptionMenu(window, var,dropDownList[0], *dropDownList, command=store_temp)
dropdown.grid(row=0, column=2)
window.mainloop()
1楼
可以通过文本属性 labelwidgetname['text'] 访问 tk.Label 显示的值。 根据您希望更新存储值的独立列表的时间和方式，有多种选择。 该示例显示了用户需要按下提交按钮的情况。 例如，这可以在执行温度计算时进行调整。
当然，直接在脚本中已导出标签文本的计算温度的点处更新存储值列表会更简单。
import tkinter as tk
stored_values = []
def add_labelvalue_tolist(temp):
'''Store label value to list.'''
stored_values.append(temp)
print('contents of list', stored_values)
def add_entry_tolabel(event):
display_label['text'] = user_entry.get()
ROOT = tk.Tk()
user_entry = tk.Entry()
user_entry.grid(column=0, row=0)
user_entry.bind('<KeyRelease>', add_entry_tolabel)
display_label = tk.Label()
display_label.grid(column=1, row=0)
# update list via button command linked to label text value
add_button = \
tk.Button(text='add to list',
command=lambda:add_labelvalue_tolist(display_label['text']))
add_button.grid(column=0, row=1)
ROOT.mainloop()
2楼
尝试制作一个这样的功能
def letterused():
converter=(letter.get())# letter is a entry box at the bottom is the code
converted.set(converter)
for i in range(1):
used_letters1.append(converter) #list
letter = ttk.Entry(root, width = 20,textvariable = letter)
letter.pack()