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Read, write, delete keyword


readCardHeader record of keyword
readKeyCmplxKeyword as complex scalar value
readKeyDblKeyword as double precision value
readKeyLongLongKeyword as int64
readKeyLongStrLong string value
readKeyUnitPhysical units string from keyword
readRecordHeader record specified by number
writeCommentWrite or append COMMENT keyword to CHU
writeDateWrite DATE keyword to CHU
writeKeyUpdate or add new keyword into current HDU
writeKeyUnitWrite physical units string
writeHistoryWrite or append HISTORY keyword to CHU
deleteKeyDelete key by name
deleteRecordDelete key by record number
getHdrSpaceNumber of keywords in header