Python错误：xlsxwriter.exceptions.FileCreateError:[Errno 2]没有这样的文件或目录：“”

Question

我想做什么：

我正在尝试使用filedialog保存文件。保存部件工作正常，但如果单击对话框上的“取消”选择不保存，则会出现此错误。如何删除此错误

我收到的错误：

Exception in Tkinter callback

FileNotFoundError: [Errno 2] No such file or directory: ''

During handling of the above exception, another exception occurred:


xlsxwriter.exceptions.FileCreateError: [Errno 2] No such file or directory: ''

下面是我的代码：

import xlsxwriter
import tkinter as tk
import tkinter.ttk as ttk
from tkinter import filedialog

def save():
    filename = filedialog.asksaveasfilename(filetypes=[("Excel files", ".xlsx .xls")],defaultextension='.xlsx')
    workbook = xlsxwriter.Workbook(filename)
    worksheet = workbook.add_worksheet()
    worksheet.write('A1', 'Common Information') 
    worksheet.write('A2', 'Circumference of Tank')
    worksheet.write('C2', 'Height of Tank')
    worksheet.write('A3', 'Minimum Thickness of Tank')
    worksheet.write('C3', 'Maximum Thickness of Tank')   

    workbook.close()  

window = tk.Tk()
window.configure(background='white')

ws = window.winfo_screenwidth()
hs = window.winfo_screenheight()
w = 700 # width for the Tk root
h = 585  # height for the Tk root
x = (ws / 2) - (w / 2)
y = (hs / 2) - (h / 2)

window.geometry('%dx%d+%d+%d' % (w, h, x, y))   

canvas = tk.Canvas(window,bg="white",width=700, height=585, highlightthickness=0)
canvas.pack()


save1 = ttk.Button(canvas, text='Save', command= lambda: save())
canvas.create_window(15, 15, window=save1, anchor=tk.NW)


window.resizable(False, False)
window.mainloop()

Answer 1

按下按钮后save函数将被调用

filename = filedialog.asksaveasfilename(filetypes=[("Excel files", ".xlsx .xls")],defaultextension='.xlsx')
....

因为当您停止选择路径时，文件名将是(it is a str类型，但其长度==0）。并且workbook = xlsxwriter.Workbook(filename)将引发异常

因此，在保存xlsx文件之前，应该使用if语句

而save()函数应该是：

def save():
    filename = filedialog.asksaveasfilename(filetypes=[("Excel files", ".xlsx .xls")],defaultextension='.xlsx')
    if filename:
        workbook = xlsxwriter.Workbook(filename)
        worksheet = workbook.add_worksheet()
        worksheet.write('A1', 'Common Information')
        worksheet.write('A2', 'Circumference of Tank')
        worksheet.write('C2', 'Height of Tank')
        worksheet.write('A3', 'Minimum Thickness of Tank')
        worksheet.write('C3', 'Maximum Thickness of Tank')

        workbook.close()