用python图片下载器 有界面

好的，以下是一个简单的Python图片下载器的带界面的代码示例：

import requests
import os
import tkinter as tk
from tkinter import filedialog

class ImageDownloader:
    def __init__(self, root):
        self.root = root

        self.url_label = tk.Label(self.root, text="Enter Image URL:")
        self.url_label.pack()

        self.url_entry = tk.Entry(self.root)
        self.url_entry.pack()

        self.folder_button = tk.Button(self.root, text="Select Folder", command=self.select_folder)
        self.folder_button.pack()

        self.download_button = tk.Button(self.root, text="Download Image", command=self.download_image)
        self.download_button.pack()

        self.selected_folder = ""

    def select_folder(self):
        self.selected_folder = filedialog.askdirectory()

    def download_image(self):
        url = self.url_entry.get()
        if url == "":
            tk.messagebox.showerror("Error", "Please enter an image URL.")
            return
        if self.selected_folder == "":
            tk.messagebox.showerror("Error", "Please select a folder to save the image.")
            return

        response = requests.get(url)
        if response.status_code != 200:
            tk.messagebox.showerror("Error", f"Failed to download image from {url}")
            return

        image_name = url.split("/")[-1]
        save_path = os.path.join(self.selected_folder, image_name)
        with open(save_path, "wb") as f:
            f.write(response.content)
        tk.messagebox.showinfo("Success", f"Image saved to {save_path}")

if __name__ == "__main__":
    root = tk.Tk()
    root.title("Image Downloader")

    downloader = ImageDownloader(root)

    root.mainloop()

这个代码使用了`tkinter`库来创建一个简单的图形界面。界面包括一个文本框用于输入图片URL，一个按钮用于选择保存图片的文件夹，以及一个下载按钮。当下载按钮被点击时，程序会使用`requests`库下载图片并保存到指定的文件夹。如果下载成功，程序会弹出一个提示框告知用户图片已经保存到哪个文件夹。如果下载失败或用户没有输入URL或选择保存文件夹，则会弹出相应的错误提示框。