modify VCF header

[aude-darracq]

Hello,

I would like to know if it is possible to modify the header of a vcf.

Functions "add_info_to_header" and "update" allow to add a new INFO line to the VCF header but I didn't find a way to modify an existing one.
For example, I would like to change the type of my custom info field from string to character.
{u'HeaderType': u'INFO', u'Description': u'"Custom field"', u'Type': u'String', u'Number': u'1', u'ID': u'CUST'}

Thanks

[brentp]

Hi, that's currently not supported.
I think the way to do it is to remove the old header, then add a new one. But, remove is not implemented. I'd accept a PR that exposed bcf_hdr_remove.