old_contents: import os
  import re
  
  from imap import EmailCheckError, EmailServer
  from postgresql import DatabaseServer
  
  
  CSV_FOLDER = os.getcwd()
  
  # Values come from `EMAIL_SUBJECT_RE`.
  CSV_NAME_FORMAT = '{year}-{month}-{day}T{hour}{minute}.csv'
  
  # Restrict emails by sender.
  EMAIL_FROM = 'sender@example.com'
  
  # Restrict emails by subject.
  EMAIL_SUBJECT_RE = re.compile(''.join([
  	r'(?P<year>\d{4})',
  	r'(?P<month>\d{2})',
  	r'(?P<day>\d{2})',
  	r'(?P<hour>\d{2})',
  	r'(?P<minute>\d{2})',
  	r'\.csv',
  ]))
  
  LOGGING_FORMAT = '''
  - file: %(pathname)s
    level: %(levelname)s
    line: %(lineno)s
    message: |
      %(message)s
    time: %(asctime)s
  '''.strip()
  
  # Values come from `EMAIL_SUBJECT_RE`.
  TABLE_NAME_FORMAT = 'data_{year}{month}'
  
  
  def get_database_client():
  	con = 'my_username/my_password@database.example.com:5432/my_database'
  	return DatabaseServer(con)
  
  
  def get_email_client():
  	return EmailServer('mail.example.com', 'my_username', 'my_password')
  
new_contents: import os
  import re
  
  from imap import EmailCheckError, EmailServer
  from postgresql import DatabaseServer
  
  
  # If this is set to a valid path, all CSV files extracted from emails will be
  # stored in sub-folders within it.
  CSV_FOLDER = os.getcwd()
  
  # Values come from `EMAIL_SUBJECT_RE`.
  CSV_NAME_FORMAT = '{year}-{month}-{day}T{hour}{minute}.csv'
  
  # Restrict emails by sender.
  EMAIL_FROM = 'sender@example.com'
  
  # Restrict emails by subject.
  EMAIL_SUBJECT_RE = re.compile(''.join([
  	r'(?P<year>\d{4})',
  	r'(?P<month>\d{2})',
  	r'(?P<day>\d{2})',
  	r'(?P<hour>\d{2})',
  	r'(?P<minute>\d{2})',
  	r'\.csv',
  ]))
  
  LOGGING_FORMAT = '''
  - file: %(pathname)s
    level: %(levelname)s
    line: %(lineno)s
    message: |
      %(message)s
    time: %(asctime)s
  '''.strip()
  
  # Values come from `EMAIL_SUBJECT_RE`.
  TABLE_NAME_FORMAT = 'data_{year}{month}'
  
  
  def get_database_client():
  	con = 'my_username/my_password@database.example.com:5432/my_database'
  	return DatabaseServer(con)
  
  
  def get_email_client():
  	return EmailServer('mail.example.com', 'my_username', 'my_password')
  
subject: Add CSV folder setting comment