So 'spack flake8 packages.py' says 'Flake8 checks were clean', but the TravisCI check does not like the escape sequence here below and results in W605 invalid escape sequence

Does anyone know how to fix this? I am unsure of what that segment of code actually does.

'HDF5_LIB([\s]*)=([\s\w\-\/.,]*)',
Does anyone know how to fix this? I am unsure of what that segment of code actually does.

I think prepending the string with r like r'HDF5_LIB([\s]*)=([\s\w\-\/.,]*)', will fix the error (i.e. use a raw string).

I'm not sure if this is something flake recently started complaining about, but I think it would be good to change:

Normally \ in a string indicates an escape sequence. In raw strings \ just means the \ character. Typically regexes that aren't using raw strings have to escape all the \ characters to make use of the regex character classes (which is to say that I'm suspicious that this regex isn't doing what was intended and that converting to a raw string will fix it).

See also: https://stackoverflow.com/questions/2081640/what-exactly-do-u-and-r-string-flags-do-and-what-are-raw-string-literals

@naromero77 Thanks!

@nvarini FYI