用Python创建一个GUI，将CSV文件转换成excel文件

import pandas as pd
from tkinter import *
from tkinter import filedialog
from tkinter import messagebox as msg
from pandastable import Table
from tkintertable import TableCanvas
class csv_to_excel:
    def __init__(self, root):
        self.root = root
        self.file_name = ''
        self.f = Frame(self.root,
                       height = 200,
                       width = 300)
        # Place the frame on root window
        self.f.pack()
        # Creating label widgets
        self.message_label = Label(self.f,
                                   text = 'GeeksForGeeks',
                                   font = ('Arial', 19,'underline'),
                                   fg = 'Green')
        self.message_label2 = Label(self.f,
                                    text = 'Converter of CSV to Excel file',
                                    font = ('Arial', 14,'underline'),
                                    fg = 'Red')
        # Buttons
        self.convert_button = Button(self.f,
                                     text = 'Convert',
                                     font = ('Arial', 14),
                                     bg = 'Orange',
                                     fg = 'Black',
                                     command = self.convert_csv_to_xls)
        self.display_button = Button(self.f,
                                     text = 'Display',
                                     font = ('Arial', 14), 
                                     bg = 'Green',
                                     fg = 'Black',
                                     command = self.display_xls_file)
        self.exit_button = Button(self.f,
                                  text = 'Exit',
                                  font = ('Arial', 14),
                                  bg = 'Red',
                                  fg = 'Black', 
                                  command = root.destroy)
        # Placing the widgets using grid manager
        self.message_label.grid(row = 1, column = 1)
        self.message_label2.grid(row = 2, column = 1)
        self.convert_button.grid(row = 3, column = 0,
                                 padx = 0, pady = 15)
        self.display_button.grid(row = 3, column = 1, 
                                 padx = 10, pady = 15)
        self.exit_button.grid(row = 3, column = 2,
                              padx = 10, pady = 15)
    def convert_csv_to_xls(self):
        try:
            self.file_name = filedialog.askopenfilename(initialdir = '/Desktop',
                                                        title = 'Select a CSV file',
                                                        filetypes = (('csv file','*.csv'),
                                                                     ('csv file','*.csv')))
            df = pd.read_csv(self.file_name)
            # Next - Pandas DF to Excel file on disk
            if(len(df) == 0):      
                msg.showinfo('No Rows Selected', 'CSV has no rows')
            else:
                # saves in the current directory
                with pd.ExcelWriter('GeeksForGeeks.xls') as writer:
                        df.to_excel(writer,'GFGSheet')
                        writer.save()
                        msg.showinfo('Excel file ceated', 'Excel File created')     
        except FileNotFoundError as e:
                msg.showerror('Error in opening file', e)
    def display_xls_file(self):
        try:
            self.file_name = filedialog.askopenfilename(initialdir = '/Desktop',
                                                        title = 'Select a excel file',
                                                        filetypes = (('excel file','*.xls'),
                                                                     ('excel file','*.xls')))
            df = pd.read_excel(self.file_name)
            if (len(df)== 0):
                msg.showinfo('No records', 'No records')
            else:
                pass
            # Now display the DF in 'Table' object
            # under'pandastable' module
            self.f2 = Frame(self.root, height=200, width=300) 
            self.f2.pack(fill=BOTH,expand=1)
            self.table = Table(self.f2, dataframe=df,read_only=True)
            self.table.show()
        except FileNotFoundError as e:
            print(e)
            msg.showerror('Error in opening file',e)
# Driver Code 
root = Tk()
root.title('GFG---Convert CSV to Excel File')
obj = csv_to_excel(root)
root.geometry('800x600')
root.mainloop()