A Format is the platonic ideal of a specific format string.
For datetime formats such as RFC1123 or ISO8601, there are many potential formats.
Like '2017-01-01' is a valid ISO8601 date. So is '2017-01-01T15:31:00'.
A Format object can describe all allomorphs of a format.
A Format is the platonic ideal of a specific format string.
For datetime formats such as RFC1123 or ISO8601, there are many potential formats. Like '2017-01-01' is a valid ISO8601 date. So is '2017-01-01T15:31:00'. A Format object can describe all allomorphs of a format.