列表框更新全局列表内容
Listbox update global list contents
我正在制作一个 GUI，用户可以在其中导入 CSV 文件，并且可以单击对这些文件执行功能的各种按钮，例如绘制 CSV 图形、查看 CSV 的迷你 table 等。每当导入文件时，它都会附加到名为 file_list 的全局列表中，我的函数通过此全局列表对文件进行操作。
我有一个 Listbox 我正在主机中显示，我想在其中显示用户导入的文件列表。我正在使用 for 循环来显示 Listbox 中每个文件的名称，但它似乎不起作用。关于如何显示这些文件名的任何提示？这是我主要 Frame 和 Listbox:
的代码
from matplotlib import pyplot
from csv import reader
from dateutil import parser
import tkinter as tk
from tkinter import ttk
from tkinter.filedialog import askopenfilename
import pandas as pd
from tkinter import Text, Scrollbar, Toplevel
file_list = []
# i'm just including openfile here, which is essentially an import button.
def openfile():
name= askopenfilename()
# file_list is appended with name everytime openfile is clicked
rev = (name[::-1])
i = rev.index('/')
name = ((rev[:i])[::-1])
file_list.append(name)
main_dataview.insert(0, name)
with open(name, 'r') as f:
data = list(reader(f))
popup = tk.Tk()
popup.wm_title("!")
# popups a message notifying what was imported
label = ttk.Label(popup, text=" %s was just imported" % (name), font=NORM_FONT)
label.pack(side="top", fill="x", pady=10)
B1 = ttk.Button(popup, text="Okay", command = popup.destroy)
B1.pack()
center(popup)
popup.mainloop()
class CODAQ(tk.Tk):
def __init__(self, *args, **kwargs):
tk.Tk.__init__(self, *args, **kwargs)
tk.Tk.wm_title(self, "CODAQ")
# main frame
container = tk.Frame(self)
container.pack(side="top", fill="both", expand = True)
container.grid_rowconfigure(0, weight=1)
container.grid_columnconfigure(0, weight=1)
container = tk.Frame(self)
container.pack(side="top", fill="both", expand = True)
container.grid_rowconfigure(0, weight=1)
container.grid_columnconfigure(0, weight=1)
# creates the menubar at the top of the window
menubar = tk.Menu(container)
# import menu for importing csv files, initializes openfile() functions
filemenu = tk.Menu(menubar, tearoff=0)
filemenu.add_command(label="Import a CSV File", command = openfile)
filemenu.add_command(label="Remove", command = remove)
menubar.add_cascade(label= "File", menu=filemenu)
# plot menu for creating graphs and figures
Plot = tk.Menu(menubar, tearoff =0 )
Plot.add_command(label="Plot Most Recent CSV", command= popupgraph)
Plot.add_command(label="Plot an Imported CSV", command = dataselection_graph)
menubar.add_cascade(label="Plot", menu=Plot)
# viewdata menu for viewing data in a table
ViewData = tk.Menu(menubar, tearoff = 0)
ViewData.add_command(label="View most recent CSV" , command = viewcsv)
ViewData.add_command(label="View an Imported CSV",command = dataselection_viewcsv)
ViewData.add_command(label="View most recent CSV Variables",command = variable_extractor)
ViewData.add_command(label="View an Imported CSV's Variables", command = variable_extractor_sel)
menubar.add_cascade(label = "View Data", menu = ViewData)
tk.Tk.config(self, menu=menubar)
self.frames = {}
# cycles through screens
for F in (WelcomeScreen, MainPage):
frame = F(container, self)
self.frames[F] = frame
frame.grid(row=0, column=0, sticky="nsew")
self.show_frame(WelcomeScreen)
def show_frame(self, cont):
frame = self.frames[cont]
frame.tkraise()
# WelcomeScreen Object
class WelcomeScreen(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self,parent)
label1 = ttk.Label(self, text="Welcome to CODAQ", font=LARGE_FONT)
label2 = ttk.Label(self, text="Begin by importing your Data", font=MEDIUM_FONT)
label1.pack(pady=0,padx=5)
label2.pack(pady=15,padx=10)
button = ttk.Button(self, text="Enter CODAQ",
command=lambda: controller.show_frame(MainPage))
button.pack()
# mainpage object
class MainPage(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
label = ttk.Label(self, text="My Data", font=LARGE_FONT)
label.grid(row= 0, column = 0, pady = (10,15), padx = (90,0))
main_dataview = tk.Listbox(self, font=NORM_FONT)
main_dataview.config(width = 44, borderwidth = 7)
main_dataview.grid(row=1, column=0, columnspan = 2)
# scroll bar functionality
scroll_y = Scrollbar(self, orient="vertical", command=main_dataview.yview)
scroll_y.grid(row=1, column=2, sticky="nsew")
# bind txt to scrollbar
main_dataview.configure(yscrollcommand=scroll_y.set)
app = CODAQ()
# size of screen
app.minsize(width=1000, height = 500)
app.mainloop()
猜测是因为你的问题遗漏了太多内容，但这里有一个可运行的示例，显示更新 tk.Listbox.
的内容
try:
import Tkinter as tk
import tkFont
import ttk
except ImportError: # Python 3
import tkinter as tk
import tkinter.font as tkFont
import tkinter.ttk as ttk
class MainPage(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
label = ttk.Label(self, text="My Data")
label.grid(row=0, column=0, pady=(10, 15), padx=(90, 0))
main_dataview = tk.Listbox(self)
main_dataview.config(width=44, borderwidth=7)
main_dataview.grid(row=1, column=0, columnspan=2)
for file in file_list:
main_dataview.insert(tk.END, file)
# make attributes for other methods to use
self.main_dataview = main_dataview
self.next_file_number = len(file_list) + 1
# scroll bar functionality
scroll_y = tk.Scrollbar(self, orient="vertical", command=main_dataview.yview)
scroll_y.grid(row=1, column=2, sticky="nsew")
# bind txt to scrollbar
main_dataview.configure(yscrollcommand=scroll_y.set)
# something to create new listbox entries
add_button = tk.Button(self, text='Add file', command=self.add_file)
add_button.grid(row=3, column=0)
def add_file(self):
"""Add a file to the listbox."""
self.main_dataview.insert(tk.END, 'file_{}'.format(self.next_file_number))
self.next_file_number += 1
# define global variable
file_list = ['file_1', 'file_2', 'file_3']
root = tk.Tk()
mp = MainPage(root, None)
mp.pack() # MainPage is a widget, needs to have layout manager method called upon it
root.mainloop()
我使用 self.main_dataview 从其他 functions/classes 访问 Listbox。
我将 openfile() 放入 class CODAQ 以访问 self.frames 和 self.frames[Mainpage].main_dataview - 所以现在我可以插入导入的文件
self.frames[MainPage].main_dataview.insert(0, name)
顺便说一句：tkinter 应该只有一个 Tk() window 和一个 mainloop() - 所以使用 Toplevel 来创建弹出窗口 window 和删除第二个 mainloop()。或使用现有消息 windows 如
tkinter.messagebox.showinfo('!', " %s was just imported" % (name))
要获取没有完整路径的文件名，您可以使用
name = os.path.basename(name)
工作代码：
from matplotlib import pyplot
from csv import reader
from dateutil import parser
import pandas as pd
import tkinter as tk
from tkinter import ttk
from tkinter.filedialog import askopenfilename
from tkinter import Text, Scrollbar, Toplevel
from tkinter.messagebox import showinfo
import os.path
MEDIUM_FONT = (20, )
LARGE_FONT = (20, )
NORM_FONT = (20, )
# i'm just including openfile here, which is essentially an import button.
class CODAQ(tk.Tk):
def __init__(self, *args, **kwargs):
tk.Tk.__init__(self, *args, **kwargs)
tk.Tk.wm_title(self, "CODAQ")
# size of screen
self.minsize(width=1000, height = 500)
self.file_list = [] # <--
# main frame
container = tk.Frame(self)
container.pack(side="top", fill="both", expand = True)
container.grid_rowconfigure(0, weight=1)
container.grid_columnconfigure(0, weight=1)
container = tk.Frame(self)
container.pack(side="top", fill="both", expand = True)
container.grid_rowconfigure(0, weight=1)
container.grid_columnconfigure(0, weight=1)
# creates the menubar at the top of the window
menubar = tk.Menu(container)
# import menu for importing csv files, initializes openfile() functions
filemenu = tk.Menu(menubar, tearoff=0)
filemenu.add_command(label="Import a CSV File", command=self.openfile) # <--
#filemenu.add_command(label="Remove", command = remove)
menubar.add_cascade(label= "File", menu=filemenu)
# plot menu for creating graphs and figures
Plot = tk.Menu(menubar, tearoff =0 )
#Plot.add_command(label="Plot Most Recent CSV", command= popupgraph)
#Plot.add_command(label="Plot an Imported CSV", command = dataselection_graph)
menubar.add_cascade(label="Plot", menu=Plot)
# viewdata menu for viewing data in a table
ViewData = tk.Menu(menubar, tearoff = 0)
#ViewData.add_command(label="View most recent CSV" , command = viewcsv)
#ViewData.add_command(label="View an Imported CSV",command = dataselection_viewcsv)
#ViewData.add_command(label="View most recent CSV Variables",command = variable_extractor)
#ViewData.add_command(label="View an Imported CSV's Variables", command = variable_extractor_sel)
menubar.add_cascade(label = "View Data", menu = ViewData)
tk.Tk.config(self, menu=menubar)
self.frames = {}
# cycles through screens
for F in (WelcomeScreen, MainPage):
frame = F(container, self)
self.frames[F] = frame
frame.grid(row=0, column=0, sticky="nsew")
self.show_frame(WelcomeScreen)
def show_frame(self, cont):
frame = self.frames[cont]
frame.tkraise()
def openfile(self):
name = askopenfilename()
# file_list is appended with name everytime openfile is clicked
#rev = (name[::-1])
#i = rev.index('/')
#name = ((rev[:i])[::-1])
name = os.path.basename(name) # <---
self.file_list.append(name)
self.frames[MainPage].main_dataview.insert(0, name) # <--
with open(name, 'r') as f:
data = list(reader(f))
showinfo('!', " %s was just imported" % (name))
#popup = tk.Toplevel() # <--
#popup.wm_title("!")
# popups a message notifying what was imported
#label = ttk.Label(popup, text=" %s was just imported" % (name), font=NORM_FONT)
#label.pack(side="top", fill="x", pady=10)
#B1 = ttk.Button(popup, text="Okay", command=popup.destroy)
#B1.pack()
#center(popup)
# --- WelcomeScreen Object ---
class WelcomeScreen(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self,parent)
label1 = ttk.Label(self, text="Welcome to CODAQ", font=LARGE_FONT)
label2 = ttk.Label(self, text="Begin by importing your Data", font=MEDIUM_FONT)
label1.pack(pady=0,padx=5)
label2.pack(pady=15,padx=10)
button = ttk.Button(self, text="Enter CODAQ",
command=lambda: controller.show_frame(MainPage))
button.pack()
# --- mainpage object ---
class MainPage(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
label = ttk.Label(self, text="My Data", font=LARGE_FONT)
label.grid(row= 0, column = 0, pady = (10,15), padx = (90,0))
self.main_dataview = tk.Listbox(self, font=NORM_FONT)
self.main_dataview.config(width = 44, borderwidth = 7)
self.main_dataview.grid(row=1, column=0, columnspan = 2)
# scroll bar functionality
scroll_y = Scrollbar(self, orient="vertical", command=self.main_dataview.yview)
scroll_y.grid(row=1, column=2, sticky="nsew")
# bind txt to scrollbar
self.main_dataview.configure(yscrollcommand=scroll_y.set)
# --- main ---
app = CODAQ()
app.mainloop()
我正在制作一个 GUI，用户可以在其中导入 CSV 文件，并且可以单击对这些文件执行功能的各种按钮，例如绘制 CSV 图形、查看 CSV 的迷你 table 等。每当导入文件时，它都会附加到名为 file_list 的全局列表中，我的函数通过此全局列表对文件进行操作。
我有一个 Listbox 我正在主机中显示，我想在其中显示用户导入的文件列表。我正在使用 for 循环来显示 Listbox 中每个文件的名称，但它似乎不起作用。关于如何显示这些文件名的任何提示？这是我主要 Frame 和 Listbox:
from matplotlib import pyplot
from csv import reader
from dateutil import parser
import tkinter as tk
from tkinter import ttk
from tkinter.filedialog import askopenfilename
import pandas as pd
from tkinter import Text, Scrollbar, Toplevel
file_list = []
# i'm just including openfile here, which is essentially an import button.
def openfile():
name= askopenfilename()
# file_list is appended with name everytime openfile is clicked
rev = (name[::-1])
i = rev.index('/')
name = ((rev[:i])[::-1])
file_list.append(name)
main_dataview.insert(0, name)
with open(name, 'r') as f:
data = list(reader(f))
popup = tk.Tk()
popup.wm_title("!")
# popups a message notifying what was imported
label = ttk.Label(popup, text=" %s was just imported" % (name), font=NORM_FONT)
label.pack(side="top", fill="x", pady=10)
B1 = ttk.Button(popup, text="Okay", command = popup.destroy)
B1.pack()
center(popup)
popup.mainloop()
class CODAQ(tk.Tk):
def __init__(self, *args, **kwargs):
tk.Tk.__init__(self, *args, **kwargs)
tk.Tk.wm_title(self, "CODAQ")
# main frame
container = tk.Frame(self)
container.pack(side="top", fill="both", expand = True)
container.grid_rowconfigure(0, weight=1)
container.grid_columnconfigure(0, weight=1)
container = tk.Frame(self)
container.pack(side="top", fill="both", expand = True)
container.grid_rowconfigure(0, weight=1)
container.grid_columnconfigure(0, weight=1)
# creates the menubar at the top of the window
menubar = tk.Menu(container)
# import menu for importing csv files, initializes openfile() functions
filemenu = tk.Menu(menubar, tearoff=0)
filemenu.add_command(label="Import a CSV File", command = openfile)
filemenu.add_command(label="Remove", command = remove)
menubar.add_cascade(label= "File", menu=filemenu)
# plot menu for creating graphs and figures
Plot = tk.Menu(menubar, tearoff =0 )
Plot.add_command(label="Plot Most Recent CSV", command= popupgraph)
Plot.add_command(label="Plot an Imported CSV", command = dataselection_graph)
menubar.add_cascade(label="Plot", menu=Plot)
# viewdata menu for viewing data in a table
ViewData = tk.Menu(menubar, tearoff = 0)
ViewData.add_command(label="View most recent CSV" , command = viewcsv)
ViewData.add_command(label="View an Imported CSV",command = dataselection_viewcsv)
ViewData.add_command(label="View most recent CSV Variables",command = variable_extractor)
ViewData.add_command(label="View an Imported CSV's Variables", command = variable_extractor_sel)
menubar.add_cascade(label = "View Data", menu = ViewData)
tk.Tk.config(self, menu=menubar)
self.frames = {}
# cycles through screens
for F in (WelcomeScreen, MainPage):
frame = F(container, self)
self.frames[F] = frame
frame.grid(row=0, column=0, sticky="nsew")
self.show_frame(WelcomeScreen)
def show_frame(self, cont):
frame = self.frames[cont]
frame.tkraise()
# WelcomeScreen Object
class WelcomeScreen(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self,parent)
label1 = ttk.Label(self, text="Welcome to CODAQ", font=LARGE_FONT)
label2 = ttk.Label(self, text="Begin by importing your Data", font=MEDIUM_FONT)
label1.pack(pady=0,padx=5)
label2.pack(pady=15,padx=10)
button = ttk.Button(self, text="Enter CODAQ",
command=lambda: controller.show_frame(MainPage))
button.pack()
# mainpage object
class MainPage(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
label = ttk.Label(self, text="My Data", font=LARGE_FONT)
label.grid(row= 0, column = 0, pady = (10,15), padx = (90,0))
main_dataview = tk.Listbox(self, font=NORM_FONT)
main_dataview.config(width = 44, borderwidth = 7)
main_dataview.grid(row=1, column=0, columnspan = 2)
# scroll bar functionality
scroll_y = Scrollbar(self, orient="vertical", command=main_dataview.yview)
scroll_y.grid(row=1, column=2, sticky="nsew")
# bind txt to scrollbar
main_dataview.configure(yscrollcommand=scroll_y.set)
app = CODAQ()
# size of screen
app.minsize(width=1000, height = 500)
app.mainloop()
猜测是因为你的问题遗漏了太多内容，但这里有一个可运行的示例，显示更新 tk.Listbox.
try:
import Tkinter as tk
import tkFont
import ttk
except ImportError: # Python 3
import tkinter as tk
import tkinter.font as tkFont
import tkinter.ttk as ttk
class MainPage(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
label = ttk.Label(self, text="My Data")
label.grid(row=0, column=0, pady=(10, 15), padx=(90, 0))
main_dataview = tk.Listbox(self)
main_dataview.config(width=44, borderwidth=7)
main_dataview.grid(row=1, column=0, columnspan=2)
for file in file_list:
main_dataview.insert(tk.END, file)
# make attributes for other methods to use
self.main_dataview = main_dataview
self.next_file_number = len(file_list) + 1
# scroll bar functionality
scroll_y = tk.Scrollbar(self, orient="vertical", command=main_dataview.yview)
scroll_y.grid(row=1, column=2, sticky="nsew")
# bind txt to scrollbar
main_dataview.configure(yscrollcommand=scroll_y.set)
# something to create new listbox entries
add_button = tk.Button(self, text='Add file', command=self.add_file)
add_button.grid(row=3, column=0)
def add_file(self):
"""Add a file to the listbox."""
self.main_dataview.insert(tk.END, 'file_{}'.format(self.next_file_number))
self.next_file_number += 1
# define global variable
file_list = ['file_1', 'file_2', 'file_3']
root = tk.Tk()
mp = MainPage(root, None)
mp.pack() # MainPage is a widget, needs to have layout manager method called upon it
root.mainloop()
我使用 self.main_dataview 从其他 functions/classes 访问 Listbox。
我将 openfile() 放入 class CODAQ 以访问 self.frames 和 self.frames[Mainpage].main_dataview - 所以现在我可以插入导入的文件
self.frames[MainPage].main_dataview.insert(0, name)
顺便说一句：tkinter 应该只有一个 Tk() window 和一个 mainloop() - 所以使用 Toplevel 来创建弹出窗口 window 和删除第二个 mainloop()。或使用现有消息 windows 如
tkinter.messagebox.showinfo('!', " %s was just imported" % (name))
要获取没有完整路径的文件名，您可以使用
name = os.path.basename(name)
工作代码：
from matplotlib import pyplot
from csv import reader
from dateutil import parser
import pandas as pd
import tkinter as tk
from tkinter import ttk
from tkinter.filedialog import askopenfilename
from tkinter import Text, Scrollbar, Toplevel
from tkinter.messagebox import showinfo
import os.path
MEDIUM_FONT = (20, )
LARGE_FONT = (20, )
NORM_FONT = (20, )
# i'm just including openfile here, which is essentially an import button.
class CODAQ(tk.Tk):
def __init__(self, *args, **kwargs):
tk.Tk.__init__(self, *args, **kwargs)
tk.Tk.wm_title(self, "CODAQ")
# size of screen
self.minsize(width=1000, height = 500)
self.file_list = [] # <--
# main frame
container = tk.Frame(self)
container.pack(side="top", fill="both", expand = True)
container.grid_rowconfigure(0, weight=1)
container.grid_columnconfigure(0, weight=1)
container = tk.Frame(self)
container.pack(side="top", fill="both", expand = True)
container.grid_rowconfigure(0, weight=1)
container.grid_columnconfigure(0, weight=1)
# creates the menubar at the top of the window
menubar = tk.Menu(container)
# import menu for importing csv files, initializes openfile() functions
filemenu = tk.Menu(menubar, tearoff=0)
filemenu.add_command(label="Import a CSV File", command=self.openfile) # <--
#filemenu.add_command(label="Remove", command = remove)
menubar.add_cascade(label= "File", menu=filemenu)
# plot menu for creating graphs and figures
Plot = tk.Menu(menubar, tearoff =0 )
#Plot.add_command(label="Plot Most Recent CSV", command= popupgraph)
#Plot.add_command(label="Plot an Imported CSV", command = dataselection_graph)
menubar.add_cascade(label="Plot", menu=Plot)
# viewdata menu for viewing data in a table
ViewData = tk.Menu(menubar, tearoff = 0)
#ViewData.add_command(label="View most recent CSV" , command = viewcsv)
#ViewData.add_command(label="View an Imported CSV",command = dataselection_viewcsv)
#ViewData.add_command(label="View most recent CSV Variables",command = variable_extractor)
#ViewData.add_command(label="View an Imported CSV's Variables", command = variable_extractor_sel)
menubar.add_cascade(label = "View Data", menu = ViewData)
tk.Tk.config(self, menu=menubar)
self.frames = {}
# cycles through screens
for F in (WelcomeScreen, MainPage):
frame = F(container, self)
self.frames[F] = frame
frame.grid(row=0, column=0, sticky="nsew")
self.show_frame(WelcomeScreen)
def show_frame(self, cont):
frame = self.frames[cont]
frame.tkraise()
def openfile(self):
name = askopenfilename()
# file_list is appended with name everytime openfile is clicked
#rev = (name[::-1])
#i = rev.index('/')
#name = ((rev[:i])[::-1])
name = os.path.basename(name) # <---
self.file_list.append(name)
self.frames[MainPage].main_dataview.insert(0, name) # <--
with open(name, 'r') as f:
data = list(reader(f))
showinfo('!', " %s was just imported" % (name))
#popup = tk.Toplevel() # <--
#popup.wm_title("!")
# popups a message notifying what was imported
#label = ttk.Label(popup, text=" %s was just imported" % (name), font=NORM_FONT)
#label.pack(side="top", fill="x", pady=10)
#B1 = ttk.Button(popup, text="Okay", command=popup.destroy)
#B1.pack()
#center(popup)
# --- WelcomeScreen Object ---
class WelcomeScreen(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self,parent)
label1 = ttk.Label(self, text="Welcome to CODAQ", font=LARGE_FONT)
label2 = ttk.Label(self, text="Begin by importing your Data", font=MEDIUM_FONT)
label1.pack(pady=0,padx=5)
label2.pack(pady=15,padx=10)
button = ttk.Button(self, text="Enter CODAQ",
command=lambda: controller.show_frame(MainPage))
button.pack()
# --- mainpage object ---
class MainPage(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
label = ttk.Label(self, text="My Data", font=LARGE_FONT)
label.grid(row= 0, column = 0, pady = (10,15), padx = (90,0))
self.main_dataview = tk.Listbox(self, font=NORM_FONT)
self.main_dataview.config(width = 44, borderwidth = 7)
self.main_dataview.grid(row=1, column=0, columnspan = 2)
# scroll bar functionality
scroll_y = Scrollbar(self, orient="vertical", command=self.main_dataview.yview)
scroll_y.grid(row=1, column=2, sticky="nsew")
# bind txt to scrollbar
self.main_dataview.configure(yscrollcommand=scroll_y.set)
# --- main ---
app = CODAQ()
app.mainloop()