FITSHEADER(1)

✨ NAME ✨

fitsheader — bestie, it prints the header(s) of a FITS file. That's it, that's the whole gig 💅

This is the fitsheader(1) page from astropy 1.0.2, and we're gonna get you fluent in it, fr fr.

🌸 DESCRIPTION 🌸

okay so here's the whole vibe upfront — this is literally how you call it:

usage: fitsheader [-h] [-e HDU] [-k KEYWORD] [-t [FORMAT]] [-c]

       filename [filename ...]

So what's it doing? It prints the header(s) of a FITS file. The optional arguments let you say which extension(s) you want, which keyword(s) you want, and what output format you want. And heads up — in the case of a compressed image, the decompressed header is shown by default. Like, by default you get the actual data's header, not the compression wrapper. Noted. 📝

🎀 positional arguments:

• filename — the path to one or more files, and yes bestie, wildcards are supported 🌈. Multiple files? Multiple filenames. Go off.

💖 optional arguments:

• -h, --help — shows this help message and then dips. exit. bye 👋
• -e HDU, --extension HDU — pick your extension by name or number. And the way this one is repeatable?? You can stack it to select multiple extensions at once. Obsessed. 🔥
• -k KEYWORD, --keyword KEYWORD — pick a keyword. Also repeatable, so you can grab multiple keywords in one go — and it supports wildcards too. She's flexible, she's iconic. ✨
• -t [FORMAT], --table [FORMAT] — prints the header(s) in machine-readable table format. The default format is "ascii.fixed_width", but you can pass things like "ascii.csv", "ascii.html", "ascii.latex", "fits", etc. So many options, so little time. 💅
• -c, --compressed — for compressed image data, this shows the true header which describes the compression rather than the data. So like, the opposite of the default. Main character of the compression world. 👑

lowkey a reminder: that compressed-image default from the DESCRIPTION? It's showing you the decompressed header. If you want the compression header instead, that's your -c moment. Don't mix 'em up bestie 🫶

And that's the whole page, no cap. This was fitsheader — part of astropy 1.0.2 — and the page itself is dated April 2015. Yeah, she's a classic, she's vintage, she still ate. 💖 Go print some headers, you got this. 🦋🌸