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Error message generated when you pass fits.open bytes instead of string-like is confusing.
See original GitHub issueI unintentionally passed fits.open a bytes object instead of str-like object the error that is generated doesn’t really indicated if it is unsupported? If it is supposed to be supported then I’ve found a bug. Code below shows minimal example of how to reproduce if you have a fits file handy.
pathtofits = "<path to a fits file>"
hdus = fits.open(pathtofits) #Works perfectly
hdus = fits.open(pathtofits.encode()) #Crash
<large stack trace>
OSError: File-like object does not have a 'write' method, required for mode 'ostream'.
OS: macOS 10.12.6 Python: 3.6.2 Astropy: 2.0.2
Issue Analytics
- State:
- Created 6 years ago
- Comments:9 (6 by maintainers)
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It works if one also changes
https://github.com/astropy/astropy/blob/v2.0.2/astropy/io/fits/util.py#L419-L420
to accept
bytes.@samaloney yes
TestFileFunctionswould be a good place to add this test. It would also be useful to add awritetotest as well.