Python代码调用download方法触发AttributeError的问题咨询

错误原因 #

1. 方法未调用：get_audio_only和first是PyTube的方法，需要加括号()执行才能返回可下载的Stream对象，你现在直接赋值给videoStream的是方法本身（函数对象），自然没有download属性。
2. 布尔值判断错误：messagebox.askyesno返回的是布尔值True或False，不是字符串'yes'，原代码的判断条件永远不会成立。

修正后的完整代码 #

import tkinter as tk
from tkinter import Button, Entry, Label, StringVar, messagebox, filedialog
from pytube import YouTube

def download_url():
    Youtube_link = video_link.get()
    download_Folder = download_folder1.get()
    # 检查是否选择了下载文件夹
    if download_Folder == 'Select Folder':
        messagebox.showwarning('提示', '请先选择下载文件夹')
        return
    try:
        getVideo = YouTube(Youtube_link)
        AorV = messagebox.askyesno('Video Type','Do you want Audio only?')
        if AorV:  # 直接判断布尔值
            videoStream = getVideo.streams.get_audio_only()  # 加括号调用方法
            videoStream.download(download_Folder)
        else:
            # 注意：first方法已被弃用，改用get_highest_resolution()更可靠
            videoStream = getVideo.streams.get_highest_resolution()
            videoStream.download(download_Folder)
        messagebox.showinfo('Success','Downloaded to \n'+download_Folder)
    except Exception as e:
        messagebox.showerror('错误', f'下载失败：{str(e)}')

def browse_folder():
    folder_name = filedialog.askdirectory(initialdir='D:\\aweso\\Downloads')
    if folder_name:  # 确认用户选择了文件夹
        download_folder1.set(folder_name)

#GUI
root = tk.Tk()
root.geometry('300x200')
root.resizable(False,False)
root.title('Youtube Downloader')

url_label = Label(root, text='Youtube URL')
url_label.pack()

video_link = StringVar()
url_link = Entry(root, textvariable= video_link)
url_link.pack()

download_folder1 = StringVar()
download_folder1.set('Select Folder')

downloadvid = Button(root, text='Download',command=download_url)
downloadvid.pack()

selected_folder = Label(root,textvariable=download_folder1)
selected_folder.pack()

browse = Button(root,text='Browse',command=browse_folder)
browse.pack()

root.mainloop()

额外优化点 #

• 增加了文件夹选择校验，避免用户未选文件夹就点击下载
• 替换了已弃用的first()方法，改用get_highest_resolution()获取最高清晰度视频
• 添加了异常捕获，能提示具体的下载失败原因（比如链接无效、网络问题等）

内容的提问来源于stack exchange，提问作者Spray Mane