Re: [PATCH v2] tuna: Fix string syntax warnings with raw strings

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On Mon, 28 Oct 2024, John B. Wyatt IV wrote:

> tuna save <filename> allows you to save your kthreads tunables to
> a file to be used by rtctl. There were several backslashes that produce
> an error that pylint and Python (at least 3.12) gives a SyntaxWarning:
> invalid escape sequence
> 
> Switch the strings written to the file with raw strings to resolve the
> warning for this section of the code.
> 
> Tested by comparing the diffs of the files.
> 
> Signed-off-by: John B. Wyatt IV <jwyatt@xxxxxxxxxx>
> Signed-off-by: John B. Wyatt IV <sageofredondo@xxxxxxxxx>
> ---
> 
> Changes in v2:
> 	- Combine the second lines of '\n' to be concatenated with the
> 	  raw strings.
> 
> ---
>  tuna/tuna.py | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/tuna/tuna.py b/tuna/tuna.py
> index bd678e2..d4c3e2c 100755
> --- a/tuna/tuna.py
> +++ b/tuna/tuna.py
> @@ -669,7 +669,7 @@ def generate_rtgroups(filename, kthreads, nr_cpus):
>  # The regex is matched against process names as printed by "ps -eo cmd".
>  
>  ''' % filename)
> -    f.write("kthreads:*:1:*:\[.*\]$\n\n")
> +    f.write(r"kthreads:*:1:*:\[.*\]$" + "\n\n")
>  
>      per_cpu_kthreads = []
>      names = list(kthreads.keys())
> @@ -688,7 +688,7 @@ def generate_rtgroups(filename, kthreads, nr_cpus):
>              elif common[:8] == "softirq-":
>                  common = "(sirq|softirq)" + common[7:]
>                  name = "s" + name[4:]
> -            regex = common + "\/.*"
> +            regex = common + r"\/.*"
>          except:
>              idx = 0
>              regex = name
> @@ -701,9 +701,9 @@ def generate_rtgroups(filename, kthreads, nr_cpus):
>          else:
>              mask = ",".join([hex(a) for a in \
>                       procfs.hexbitmask(kt.affinity, nr_cpus)])
> -        f.write("%s:%c:%d:%s:\[%s\]$\n" % (name, \
> +        f.write(r"%s:%c:%d:%s:\[%s\]$" % (name, \
>                             tuna_sched.sched_str(kt.policy)[6].lower(), \
> -                            kt.rtprio, mask, regex))
> +                            kt.rtprio, mask, regex) + "\n")
>      f.close()
>  
>  
> -- 

Signed-off-by: John Kacur <jkacur@xxxxxxxxxx>

Thank you John Wyatt





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