写一个简单可直接运行的简单电子邮件接收与发送代码

以下是一个简单的Python代码示例，用于接收与发送电子邮件：

import smtplib
import imaplib
from email.mime.text import MIMEText
from email.mime.multipart import MIMEMultipart
from email.mime.image import MIMEImage
from email.mime.base import MIMEBase
from email import encoders

SMTP_SERVER = 'smtp.gmail.com'
SMTP_PORT = 587

IMAP_SERVER = 'imap.gmail.com'
IMAP_PORT = 993

EMAIL_ADDRESS = 'your_email@gmail.com'
EMAIL_PASSWORD = 'your_email_password'

def send_email(to, subject, body, file=None):
    msg = MIMEMultipart()
    msg['From'] = EMAIL_ADDRESS
    msg['To'] = to
    msg['Subject'] = subject

    msg.attach(MIMEText(body, 'plain'))

    if file:
        with open(file, 'rb') as f:
            img_data = f.read()
        image = MIMEImage(img_data, name=file)
        msg.attach(image)

    text = msg.as_string()

    conn = smtplib.SMTP(SMTP_SERVER, SMTP_PORT)
    conn.ehlo()
    conn.starttls()
    conn.login(EMAIL_ADDRESS, EMAIL_PASSWORD)
    conn.sendmail(EMAIL_ADDRESS, to, text)
    conn.quit()

    print('Email sent successfully.')

def receive_email():
    conn = imaplib.IMAP4_SSL(IMAP_SERVER, IMAP_PORT)
    conn.login(EMAIL_ADDRESS, EMAIL_PASSWORD)
    conn.select('inbox')

    result, data = conn.search(None, 'ALL')

    ids = data[0]
    id_list = ids.split()

    for i in id_list:
        result, data = conn.fetch(i, '(RFC822)')

        raw_email = data[0][1]
        raw_email_string = raw_email.decode('utf-8')
        email_message = email.message_from_string(raw_email_string)

        print('From:', email_message['From'])
        print('Subject:', email_message['Subject'])
        print('Body:', email_message.get_payload())

要发送电子邮件，请使用以下代码：

send_email('recipient@example.com', 'Test email', 'This is a test email.', 'test.jpg')

要接收电子邮件，请使用以下代码：

receive_email()

请记得将`EMAIL_ADDRESS`和`EMAIL_PASSWORD`更改为您自己的电子邮件地址和密码，以及将`SMTP_SERVER`和`IMAP_SERVER`更改为您的电子邮件提供商的SMTP和IMAP服务器。