Python 列表框更新全局列表内容
我正在制作一个GUI，用户可以在其中导入CSV文件，并可以单击各种按钮对这些文件执行功能，例如绘制CSV图形、查看CSV的小表等。每当导入文件时，它都会附加到名为Python 列表框更新全局列表内容,python,csv,tkinter,listbox,frame,Python,Csv,Tkinter,Listbox,Frame,我正在制作一个GUI，用户可以在其中导入CSV文件，并可以单击各种按钮对这些文件执行功能，例如绘制CSV图形、查看CSV的小表等。每当导入文件时，它都会附加到名为文件列表的全局列表中，我的功能通过该全局列表对文件进行操作 我在大型机中显示了一个列表框，我想在其中显示用户导入的文件列表。我使用for循环在列表框中显示每个文件的名称，但它似乎不起作用。有关于如何显示这些文件名的提示吗？以下是我为主框架和列表框提供的代码： from matplotlib import pyplot from csv
文件列表列表框列表框中显示每个文件的名称，但它似乎不起作用。有关于如何显示这些文件名的提示吗？以下是我为主框架
和列表框
提供的代码：
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，因为您的问题遗漏了太多内容，但这里有一个可运行的示例，显示如何更新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
从其他函数/类访问Listbox
我将openfile（）
放入classcodaq
中，以访问self.frames
和self.frames[Mainpage]。main\u dataview
-因此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（）
窗口和一个mainloop（）
-所以使用toploy
创建弹出窗口并删除第二个mainloop（）
。或者使用现有的消息窗口，如
tkinter.messagebox.showinfo('!', " %s was just imported" % (name))
要获取没有完整路径的文件名，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()
从matplotlib导入pyplot
从csv导入读取器
从dateutil导入解析器
作为pd进口熊猫
将tkinter作为tk导入
从tkinter导入ttk
从tkinter.filedialog导入askopenfilename
从tkinter导入文本、滚动条、顶级
从tkinter.messagebox导入showinfo
导入操作系统路径
中等字体=（20，）
大字体=（20，）
标准字体=（20，）
#我只是在这里包括openfile，它本质上是一个导入按钮。
类别代码AQ（tk.tk）：
定义初始化（self，*args，**kwargs）：
tk.tk.\uuuuu初始化（self，*args，**kwargs）
tk.tk.wm_标题（自我，“CODAQ”）
#屏幕尺寸
最小尺寸（宽度=1000，高度=500）
self.file_list=[]#当file_list
为空时，可能会在开始时执行for
。当文件列表
更改内容时，它不会自动执行。当您将新元素添加到文件列表
@furas时，您必须手动更新列表框
？我尝试使用updateidletask，但我不确定它是如何工作的updateidletask
用于重新绘制小部件，但您必须再次使用main\u数据视图。插入（0，文件）
在用户每次导入新文件时向列表框添加元素。但是main\u数据视图
属于Mainpage
类，当我将main\u dataview.insert（0，file）
添加到我的导入函数时，它表示main\u dataview
未定义，您将显示完整的代码以理解问题。您是在启动程序之前还是在运行程序期间将文件名添加到文件列表中？如果在此之前，您的代码应该工作，如果在此期间，您必须手动将此名称添加到main\u dataview
-但您可能必须使用self.main\u dataview
，并执行其他操作-因此它可能更复杂，如果没有完整的代码，我们无法解释它。