如何使用Python从文件夹以电子邮件形式发送随机的pdf文件？

import os
import random
import smtplib
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText
from email.mime.application import MIMEApplication

sender_email = "your_email@example.com"
sender_password = "your_email_password"
receiver_email = "recipient_email@example.com"

def get_random_pdf(folder_path):
    pdf_files = [file for file in os.listdir(folder_path) if file.endswith(".pdf")]
    random_pdf = random.choice(pdf_files)
    return random_pdf

def send_email_with_pdf(sender_email, sender_password, receiver_email, pdf_file):
    msg = MIMEMultipart()
    msg["From"] = sender_email
    msg["To"] = receiver_email
    msg["Subject"] = "Random PDF File"

    body = "Please find the attached random PDF file."
    msg.attach(MIMEText(body, "plain"))

    with open(pdf_file, "rb") as file:
        attachment = MIMEApplication(file.read(), _subtype="pdf")
        attachment.add_header("Content-Disposition", "attachment", filename=pdf_file)
        msg.attach(attachment)

    server = smtplib.SMTP("smtp.gmail.com", 587)
    server.starttls()
    server.login(sender_email, sender_password)
    server.send_message(msg)
    server.quit()

folder_path = "/path/to/pdf/folder"
random_pdf_file = get_random_pdf(folder_path)
send_email_with_pdf(sender_email, sender_password, receiver_email, random_pdf_file)