[Biopython] fetching chromosome sizes without gff file?

[Tommy Carstensen]

Is it possible to get the chromosome lengths in maize (Zea mays), zebra
fish and humans with Biopython without having the relevant gff files? How
would I go about doing that? Basically I just want to be able to fetch the
gff by typing in species='homo sapiens' and build=37 or something like that
without having to worry about URLs.

Could Biopython also give me the position of the pseudoautosomal regions on
the X chromosome in Homo sapiens?

Thanks,
Tommy
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