GridSearchCV зависает в первую эпоху с n_jobs & gt; 1

Я бы предложил сделать это, (Python 3)

typ, data = conn.fetch('1', '(RFC822)') # will read the first email
email_content = data[0][1] 
msg = email.message_from_bytes(email_content) # this needs to be corrected in your case 
emailDate =  msg["Date"]
emaiSubject = msg["Subject"]