这是我正在调用的类和来自不同文件的函数
class CalcFunc:
def clearScreen(self):
self.log("CLEAR (CE)")
ent.delete(0, END)
这是条目框
ent = Entry(root, textvariable=clc.getBtn, justify=RIGHT, font=10, relief=RIDGE, bd=2, width=15)
ent.grid(row=0, columnspan=3, pady=10)
这是我点击清除条目框的按钮
buttonCC = Button(root, text="CLEAR (CE)", height=1, width=20, bg='orange', command=clc.clearScreen)
我不确定语法是什么，基本上可以从类中清除Entry小部件。当我在同一个文件中使用它时，该代码有效，但我的项目要求它在一个单独的文件中。它是计算器的类项目，“清除”按钮清除Entry小部件。如果有帮助，我可以发布我的整个代码。谢谢。
---- ---- EDIT
我的班级
import time
class CalcFunc:
def log(self, val):
myFile = open(r".\log.dat", "a")
myFile.write("%s\n" % val)
myFile.close()
def onScreen(self, iVal):
self.log(iVal)
currentTxt = self.getBtn.get()
updateEnt = self.getBtn.set(currentTxt + iVal)
def clearScreen(self):
self.log("CLEAR (CE)")
ent.delete(0, END)
def evaL(self):
self.log("=")
self.getBtn.set(str(eval(self.getBtn.get())))
self.log(self.getBtn.get())
def logLbl(self):
myFile = open(r".\log.dat", "a")
myFile.write("\n==================================\n")
myFile.write("Date: " + str(time.strftime("%m/%d/%Y")) + " -- Time: " + str(time.strftime("%I:%M:%S")))
myFile.write("\n==================================\n")
myFile.close()
我的计划
from tkinter import *
import time
import clcClass
root = Tk()
root.title('skClc v1')
clc = clcClass.CalcFunc()
clc.logLbl()
clc.getBtn = StringVar()
ent = Entry(root, textvariable=clc.getBtn, justify=RIGHT, font=10, relief=RIDGE, bd=2, width=15)
ent.grid(row=0, columnspan=3, pady=10)
button1 = Button(root, text="1", height=1, width=5, bg='light blue', command=lambda:clc.onScreen('1'))
button2 = Button(root, text="2", height=1, width=5, bg='light blue', command=lambda:clc.onScreen('2'))
button3 = Button(root, text="3", height=1, width=5, bg='light blue', command=lambda:clc.onScreen('3'))
button4 = Button(root, text="4", height=1, width=5, bg='light blue', command=lambda:clc.onScreen('4'))
button5 = Button(root, text="5", height=1, width=5, bg='light blue', command=lambda:clc.onScreen('5'))
button6 = Button(root, text="6", height=1, width=5, bg='light blue', command=lambda:clc.onScreen('6'))
button7 = Button(root, text="7", height=1, width=5, bg='light blue', command=lambda:clc.onScreen('7'))
button8 = Button(root, text="8", height=1, width=5, bg='light blue', command=lambda:clc.onScreen('8'))
button9 = Button(root, text="9", height=1, width=5, bg='light blue', command=lambda:clc.onScreen('9'))
button0 = Button(root, text="0", height=1, width=5, bg='light blue', command=lambda:onScreen('0'))
buttonP = Button(root, text="+", height=1, width=5, bg='gray', command=lambda:clc.onScreen('+'))
buttonM = Button(root, text="-", height=1, width=5, bg='gray', command=lambda:clc.onScreen('-'))
buttonMM = Button(root, text="x", height=1, width=5, bg='gray', command=lambda:clc.onScreen('*'))
buttonDD = Button(root, text="÷", height=1, width=5, bg='gray', command=lambda:clc.onScreen('/'))
buttonEE = Button(root, text="=", height=1, width=5, bg='light green', command=clc.evaL)
buttonCC = Button(root, text="CLEAR (CE)", height=1, width=20, bg='orange', command=clc.clearScreen)
button1.grid(row=1, column=0, pady=5)
button2.grid(row=1, column=1, pady=5)
button3.grid(row=1, column=2, pady=5)
button4.grid(row=2, column=0, pady=5)
button5.grid(row=2, column=1, pady=5)
button6.grid(row=2, column=2, pady=5)
button7.grid(row=3, column=0, pady=5)
button8.grid(row=3, column=1, pady=5)
button9.grid(row=3, column=2, pady=5)
button0.grid(row=4, column=0, pady=5)
buttonP.grid(row=4, column=1, pady=5)
buttonM.grid(row=4, column=2, pady=5)
buttonEE.grid(row=5, column=0, pady=5)
buttonDD.grid(row=5, column=1, pady=5)
buttonMM.grid(row=5, column=2, pady=5)
buttonCC.grid(row=6, column=0, pady=5, columnspan=3)
root.maxsize(140,245);
root.minsize(140,245);
root.mainloop()
答案 0 :(得分：1)
da.InsertCommand.Parameters.Add("@NoAMiddleName", SqlDbType.VarChar).Value = txtMname.Text;
ent = Entry(root, ....)
clc = clcClass.CalcFunc(ent)
这是一个简短的例子：
class CalcFunc:
def __init__(self, entry):
self.entry = entry
def clearScreen(self):
self.log("CLEAR (CE)")
self.entry.delete(0, END)
请注意，我没有使用StringVar（），这似乎不是必需的。如果您需要，可以随时将其作为参数传递给#my_entry.py
from tkinter import END
import time
class EntryWithLogger:
def __init__(self, entry):
self.entry = entry
def log(self, val):
with open("log.dat", "a") as my_file: #Automatically closes the file--even if an exception occurs, which is not the case with my_file.close().
my_file.write("%s\n" % val)
def onScreen(self, i_val):
self.log(i_val)
self.entry.insert(END, i_val)
def clearScreen(self):
self.log("CLEAR (CE)")
self.entry.delete(0, END)
，然后将其存储在__init__()上。
self或者，你可以这样做：
import my_entry as me
import tkinter as tk
root = tk.Tk()
root.title("Calculator")
root.geometry("+100+50") #("300x500+200+10") dimension, position
entry = tk.Entry(root, justify=tk.RIGHT, font=10, relief=tk.RIDGE, bd=2, width=15)
entry.grid(row=0, columnspan=3, pady=10)
entry_with_logger = me.EntryWithLogger(entry)
#Create the buttons in a loop:
for i in range(10):
row_num, col_num = divmod(i, 3) #divmod(7, 2) => (3, 1), divmod(0, 3) => (0, 0), divmod(4, 3) => (1, 1)
row_num += 1
button_text = str(i)
tk.Button(root, text=button_text,
height=1,
width=5,
bg='light blue',
command=lambda x=button_text: entry_with_logger.onScreen(x)
).grid(row=row_num, column=col_num, pady=5)
#Put the clear button at the bottom of the grid:
tk.Button(root, text="CLEAR (CE)",
height=1,
width=20,
bg='orange',
command=entry_with_logger.clearScreen
).grid(row=row_num+1, columnspan=3) #columnspan tells grid() to use 3 cells for the button,
#and the button will be centered by default.
root.mainloop()
#my_entry.py
from tkinter import Entry, END
import time
class EntryWithLogger(Entry):
#Because __init__() is not implemented, the parent class's __init__() gets
#called, so you create an EntryWithLogger just like you would an Entry.
def log(self, val):
with open("log.dat", "a") as my_file: #Automatically closes the file--even if there is an exception, which is not the case with my_file.close().
my_file.write("%s\n" % val)
def onScreen(self, i_val):
self.log(i_val)
self.insert(END, i_val)
def clearScreen(self):
self.log("CLEAR (CE)")
self.delete(0, END)