我有一個我制作的 tkinter 視窗類，但我的洗掉功能無法正常作業。
my_window = tk.Tk()
class QuoteForm():
def __init__(self,master):
self.file_data = ''
self.master = master
self.master.rowconfigure(0, weight=1)
self.master.rowconfigure(1, weight= 1)
self.master.rowconfigure(2, weight = 1)
master.geometry('600x400')
master.resizable(False,False)
#create the frames
self.directory_frm = tk.Frame(master=master)
self.directory_frm.grid(row=0) #this is the frame for the directory
self.add_on_frm = tk.Frame(master=master)
self.add_on_frm.grid(row=1) #this is the frame for add-ons input
self.button_frm = tk.Frame(master=master)
self.button_frm.grid(row=2) #this is the frame for
#creates buttons, entries, labels
self.load_directory_frame() #creates and grids the directory button
self.load_add_on_frame() #creates and grids the entry buttons and labels
self.load_button_frame() #creates and grids the buttons
my_window.mainloop()
def load_add_on_frame(self):
vcmd = (self.master.register(self.validate_ent), '%S')
#create inputs and labels for add-ons
self.trip_ent = tk.Entry(master=self.add_on_frm,validate = 'key', validatecommand = vcmd, name='trip_ent')
self.trip_ent.grid(column= 1, row = 0)
self.raw_cutouts_ent = tk.Entry(master=self.add_on_frm,validate = 'key', validatecommand = vcmd)
self.raw_cutouts_ent.grid(column= 3, row = 0)
def clear_entries(self):
entries = (self.trip_ent, self.raw_cutouts_ent) #list of entries to loop (there are a total of 12 in the actual code)
for entry in entries:
entry.delete(0,len(entry.get())) #this is where the trouble seems to happen
new_quote = QuoteForm(my_window)
我的問題是倒數第二行代碼（以'entry.delete'開頭）通常你會做'entry.delete（0，END）'但是因為entry是一個變數代碼不會運行END . 'END' 是無效索引，'end' 與拉長度的作用相同，因此我試圖通過使 'end' 成為條目中任何內容的長度來使其動態化。然而，當我這樣做時，它不會洗掉任何內容 [我也嘗試用 int(len(entry.get()))] 強制它。如果我手動輸入一個整數，它將洗掉該整數以內的所有內容，包括它是否與該條目的長度相同，并且我將中斷以確認我正在獲得一個 int 回傳并且我是。
我意識到我可以只寫一行代碼來單獨洗掉每個條目，但總共有 12 個，我想清理它。
我正在添加完整的代碼以便能夠在下面運行
import os
import re
import tkinter as tk
from tkinter import filedialog as fd
from tkinter import messagebox
import pandas as pd
my_window = tk.Tk()
class QuoteForm():
def __init__(self,master):
self.file_data = ''
self.master = master
self.master.rowconfigure(0, weight=1)
self.master.rowconfigure(1, weight= 1)
self.master.rowconfigure(2, weight = 1)
master.geometry('600x400')
master.resizable(False,False)
self.directory_frm = tk.Frame(master=master)
self.directory_frm.grid(row=0) #this is the frame for the directory
self.add_on_frm = tk.Frame(master=master)
self.add_on_frm.grid(row=1) #this is the frame for add-ons input
self.button_frm = tk.Frame(master=master)
self.button_frm.grid(row=2) #this is the frame for
self.load_directory_frame()
self.load_add_on_frame()
self.load_button_frame()
my_window.mainloop()
@staticmethod
def get_quote_data(filepath):
#read csv to get job infomation for pricing
try:
if filepath:
job_info = pd.read_csv(filepath,
index_col=0, #set index column
skiprows=range(4), #skip first 4 rows
usecols=['Item','Quan'])
job_info = job_info.drop(labels='Grand Total:', axis= 0)
customer_info = pd.read_csv(filepath, header=None,
skiprows= lambda x: x not in range(2), #skip any row beyond first two rows
usecols=[0,1]) #use first two columns
customer_info = {customer_info.at[0,0].replace(':',''): customer_info.at[0,1], ##formatting the data for legibility
customer_info.at[1,0].replace(':','') : customer_info.at[1,1]}
return [customer_info, job_info]
except:
messagebox.showerror("Data Invalid", "Please make sure you select a valid estimate CSV file.")
def sink_check(self):
####this is to be used at the submit buttons to confirm that there are not more sinks than cutouts
cutouts = self.um_sink_inst_ent.get()
sink_quan_list = (self.std_sink_ent.get(),self.upgrd_sink_ent.get(),self.van_sink_ent.get(),self.cust_sink_temp_ent.get())
sinks = sum(sink_quan_list)
if sinks > cutouts:
return False
###check that the sinks included does not exceed the number of sinks charged for install
return True
def validate_ent(self,input):
if not input:
return True
elif re.fullmatch(r'[0-9]',input):
return True
return False
def open_file(self):
file = fd.askopenfile(mode='r', filetypes=[('CSV Files', '*.csv')])
if file:
filepath = os.path.abspath(file.name)
file_data = self.get_quote_data(filepath)
cust_name = file_data[0]['Name']
job_addr = file_data[0]['Addr']
self.file_select_text['text'] = f"{job_addr} for {cust_name} is currently selected"
def load_directory_frame(self):
file_select_btn = tk.Button(master=self.directory_frm,text= "Select a file",command=self.open_file)
file_select_btn.grid(column=0, row=0)
self.file_select_text = tk.Label(master=self.directory_frm, text = "No File Selected")
self.file_select_text.grid(column=1, row=0)
def load_add_on_frame(self):
vcmd = (self.master.register(self.validate_ent), '%S')
#create inputs and labels for add-ons
self.trip_ent = tk.Entry(master=self.add_on_frm,validate = 'key', validatecommand = vcmd, name='trip_ent')
self.trip_ent.grid(column= 1, row = 0)
self.raw_cutouts_ent = tk.Entry(master=self.add_on_frm,validate = 'key', validatecommand = vcmd)
self.raw_cutouts_ent.grid(column= 3, row = 0)
self.radii_ent = tk.Entry(master=self.add_on_frm,validate = 'key', validatecommand = vcmd)
self.radii_ent.grid(column= 1, row = 1)
self.arcs_ent = tk.Entry(master=self.add_on_frm,validate = 'key', validatecommand = vcmd)
self.arcs_ent.grid(column= 3, row = 1)
self.splay_ent = tk.Entry(master=self.add_on_frm,validate = 'key', validatecommand = vcmd)
self.splay_ent.grid(column= 1, row = 2)
self.wtrfall_ent = tk.Entry(master=self.add_on_frm,validate = 'key', validatecommand = vcmd)
self.wtrfall_ent.grid(column= 3, row = 2)
self.um_sink_inst_ent = tk.Entry(master=self.add_on_frm,validate = 'key', validatecommand = vcmd)
self.um_sink_inst_ent.grid(column= 1, row = 3)
self.farm_sink_co_ent = tk.Entry(master=self.add_on_frm,validate = 'key', validatecommand = vcmd)
self.farm_sink_co_ent.grid(column= 3, row = 3)
self.std_sink_ent = tk.Entry(master=self.add_on_frm,validate = 'key', validatecommand = vcmd)
self.std_sink_ent.grid(column= 1, row = 4)
self.upgrd_sink_ent = tk.Entry(master=self.add_on_frm,validate = 'key', validatecommand = vcmd)
self.upgrd_sink_ent.grid(column= 3, row = 4)
self.van_sink_ent = tk.Entry(master=self.add_on_frm,validate = 'key', validatecommand = vcmd)
self.van_sink_ent.grid(column= 1, row = 5)
self.cust_sink_temp_ent = tk.Entry(master=self.add_on_frm,validate = 'key', validatecommand = vcmd)
self.cust_sink_temp_ent.grid(column= 3, row = 5)
trip_lbl = tk.Label(master=self.add_on_frm,text = "Extra Trip(s)")
trip_lbl.grid(column= 0, row = 0)
raw_cutouts_lbl = tk.Label(master=self.add_on_frm,text = "Unpolished Cutout(s)")
raw_cutouts_lbl.grid(column= 2, row = 0)
radii_lbl = tk.Label(master=self.add_on_frm,text = "Radii")
radii_lbl.grid(column= 0, row = 1)
arcs_lbl = tk.Label(master=self.add_on_frm,text = "Arc(s)")
arcs_lbl.grid(column= 2, row = 1)
splay_lbl = tk.Label(master=self.add_on_frm,text = "Splay(s)")
splay_lbl.grid(column= 0, row = 2)
wtrfall_lbl = tk.Label(master=self.add_on_frm,text = "Waterfal Leg(s)")
wtrfall_lbl.grid(column= 2, row = 2)
um_sink_inst_lbl = tk.Label(master=self.add_on_frm,text = "Install of UM Sink(s)")
um_sink_inst_lbl.grid(column= 0, row = 3)
farm_sink_co_lbl = tk.Label(master=self.add_on_frm,text = "Farm Sink C/O")
farm_sink_co_lbl.grid(column= 2, row = 3)
std_sink_lbl = tk.Label(master=self.add_on_frm,text = "Standard 18ga Sink(s)")
std_sink_lbl.grid(column= 0, row = 4)
upgrd_sink_lbl = tk.Label(master=self.add_on_frm,text = "Upgrade 18ga Sink(s)")
upgrd_sink_lbl.grid(column= 2, row = 4)
van_sink_lbl = tk.Label(master=self.add_on_frm,text = "Vanity Sink(s)")
van_sink_lbl.grid(column= 0, row = 5)
cust_sink_temp_lbl = tk.Label(master=self.add_on_frm,text = "Customer Sink Template(s)")
cust_sink_temp_lbl.grid(column= 2, row = 5)
def load_button_frame(self):
submit_btn = tk.Button(master=self.button_frm, text='Submit')
submit_btn.grid(column=0,row=0)
clear_btn = tk.Button(master=self.button_frm,text='Clear',command=self.clear_entries)
clear_btn.grid(column=1, row=0)
advanced_btn = tk.Button(master=self.button_frm,text='Advanced')
advanced_btn.grid(column=2, row=0)
def clear_entries(self):
entries = (self.trip_ent, self.raw_cutouts_ent, self.radii_ent, self.arcs_ent, self.splay_ent, #list of entry boxes on the form
self.wtrfall_ent, self.um_sink_inst_ent, self.um_sink_inst_ent, self.farm_sink_co_ent,
self.std_sink_ent, self.upgrd_sink_ent, self.van_sink_ent, self.cust_sink_temp_ent)
for entry in entries:
entry.delete(0,tk.END)
new_quote = QuoteForm(my_window)
uj5u.com熱心網友回復：
這完全取決于您的validate_ent功能。只有當它回傳 true 時，您的輸入文本才能更改。在鍵入 tkinter 時，只會發送單個字符，如“1”、“2”、“a”。即使您使用退格鍵洗掉，此函式也會獲取您要洗掉的字符。但是，當您嘗試清除它時，函式會作為輸入整個字串，例如“123543123”。這不會發生在 r'[0-9]' 正則運算式中，并且您回傳 false 因此 tkinter 拒絕洗掉它。有兩個簡單的解決方案可以解決這個問題。第一個為更長的輸入添加另一個條件，例如：
def validate_ent(self,input):
if not input:
return True
elif re.fullmatch(r'[0-9]',input):
return True
if(len(input)>2):
return True
return False
但是我不推薦這個，因為如果有人復制粘貼更長的輸入，那么它可以在輸入框中寫字母。
def validate_ent(self,input):
if not input:
return True
elif re.fullmatch(r'[0-9]*',input):
return True
return False
在這里，我們為正則運算式添加了一個星號。現在它接受大于 9 的數字。現在人們也可以粘貼符合此規則的數字。也可以按預期洗掉作品！
uj5u.com熱心網友回復：
如果輸入中有多個數字，您有一個驗證函式會拒絕洗掉。當輸入欄位中只有一個數字時，您的函式將起作用。
您可以通過在其中添加列印陳述句validate_ent然后遵循input引數中的邏輯來查看這一點。
轉載請註明出處，本文鏈接：https://www.uj5u.com/qita/535020.html