我使用Python从gmail下载图片附件，使用以下脚本：

#!/usr/bin/env python3
# read emails and detach attachment in attachments directory
 
import email
import getpass, imaplib
import os
import sys
import time
 
detach_dir = '.'
if 'attachments' not in os.listdir(detach_dir):
    os.mkdir('/var/www/html/attachments')
 
userName = 'enter-your-gmail-account-name-here'
passwd = 'enter-your-password-here'
 
try:
    imapSession = imaplib.IMAP4_SSL('imap.gmail.com',993)
    typ, accountDetails = imapSession.login(userName, passwd)
    if typ != 'OK':
        print ('Not able to sign in!')
        raise Exception
 
    imapSession.select('Inbox')
    typ, data = imapSession.search(None, 'SUBJECT', '"DASHBOARD"')
    if typ != 'OK':
        print ('Error searching Inbox.')
        raise Exception
 
    # Iterating over all emails
    for msgId in data[0].split():
        typ, messageParts = imapSession.fetch(msgId, '(RFC822)')
 
        if typ != 'OK':
            print ('Error fetching mail.')
            raise Exception
 
        emailBody = messageParts[0][1] 
        mail = email.message_from_bytes(emailBody) 
 
        for part in mail.walk():
 
            if part.get_content_maintype() == 'multipart':
 
                continue
            if part.get('Content-Disposition') is None:
 
                continue
 
            fileName = part.get_filename()
 
            if bool(fileName): 
                filePath = os.path.join(detach_dir, '/var/www/html/attachments', fileName)
                if not os.path.isfile(filePath) : 
                    print (fileName)
                    print (filePath)
                    fp = open(filePath, 'wb')
                    fp.write(part.get_payload(decode=True))
                    fp.close()
 
    #MOVING EMAILS TO PROCESSED PART BEGINS HERE
    imapSession.select(mailbox='inbox', readonly=False)
    resp, items = imapSession.search(None, 'All')
    email_ids = items[0].split()
    for email in email_ids:
        latest_email_id = email
 
        #move to processed
        result = imapSession.store(latest_email_id, '+X-GM-LABELS', 'Processed')
 
        if result[0] == 'OK':
            #delete from inbox
            imapSession.store(latest_email_id, '+FLAGS', '\\Deleted')
 
    #END OF MOVING EMAILS TO PROCESSED
 
    imapSession.close()
    imapSession.logout()
 
except :
    print ('No attachments were downloaded')

我收到以下错误：

Traceback (most recent call last):
  File "/home/jenns/get_images_from_emails.py", line 12, in <module>
    os.mkdir('/var/www/html/attachments')
FileExistsError: [Errno 17] File exists: '/var/www/html/attachments'

我注意到python3不在#中！/usr/bin/env python3并将其更改为#！/usr/bin python3没有产生不同的结果。
我知道Gmail端正在工作，因为附件正在移动到已处理文件夹，电子邮件从我的收件箱中删除。
我也使用了sudo chmod 775 '/var/www/html/attachments'，但这并没有解决问题。对于为什么不能使用脚本get_images_from_emails.py下载文件，有什么想法吗？