Comment (by Roland Haas):

Not having read most of the remainder of the ticket nor looked at the code. it can also be useful to in cases like this, add:

CarpetIOASCII::compact_format = yes

which removes a lot of the extra whitespace and comments (but also changes the column mapping so you must not rely on say column 10 being “time” and have to parse the header on top for a column name to column mapping).

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2691/new-features-to-particle_traceret