If max_age is -1, the cookie is a session cookie, and will expire at the end
of the client's session. Otherwise, it is the number of seconds until the
cookie expires. You can use the constants SOUP_COOKIE_MAX_AGE_ONE_HOUR,
SOUP_COOKIE_MAX_AGE_ONE_DAY, SOUP_COOKIE_MAX_AGE_ONE_WEEK and
SOUP_COOKIE_MAX_AGE_ONE_YEAR (or multiples thereof) to calculate this value.
(A value of 0 indicates that the cookie should be considered
already-expired.)
Sets cookie's max age to max_age.
If max_age is -1, the cookie is a session cookie, and will expire at the end of the client's session. Otherwise, it is the number of seconds until the cookie expires. You can use the constants SOUP_COOKIE_MAX_AGE_ONE_HOUR, SOUP_COOKIE_MAX_AGE_ONE_DAY, SOUP_COOKIE_MAX_AGE_ONE_WEEK and SOUP_COOKIE_MAX_AGE_ONE_YEAR (or multiples thereof) to calculate this value. (A value of 0 indicates that the cookie should be considered already-expired.)
This sets the same property as soup.cookie.Cookie.setExpires.