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Read, write, delete keyword


readCard Header record of keyword
readKey Keyword
readKeyCmplx Keyword as complex scalar value
readKeyDbl Keyword as double precision value
readKeyLongLong Keyword as int64
readKeyLongStr Long string value
readKeyUnit Physical units string from keyword
readRecord Header record specified by number
writeComment Write or append COMMENT keyword to CHU
writeDate Write DATE keyword to CHU
writeKey Update or add new keyword into current HDU
writeKeyUnit Write physical units string
writeHistory Write or append HISTORY keyword to CHU
deleteKey Delete key by name
deleteRecord Delete key by record number
getHdrSpace Number of keywords in header
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