[PATCH v2] tuna: tuna-cmd.py use fstrings

[Leah Leshchinsky]

Add fstrings where possible to improve readabilty

Due to the discussion regarding dropping the language feature, gettext
shorthand _() have been removed.

Signed-off-by: Leah Leshchinsky <lleshchi(a)redhat.com&gt;

---

target branch: main

diff --git a/tuna-cmd.py b/tuna-cmd.py
index c5bc65059da7..44d9faaf15fb 100755
--- a/tuna-cmd.py
+++ b/tuna-cmd.py
@@ -89,7 +89,7 @@ irqs = None
 
 class HelpMessageParser(argparse.ArgumentParser):
     def error(self, message):
-        sys.stderr.write('error: %s\n' % message)
+        sys.stderr.write(f'error: {message}\n')
         self.print_help()
         sys.exit(2)
 
@@ -263,13 +263,16 @@ def thread_help(tid):
         ps = procfs.pidstats()
 
     if tid not in ps:
-        print("tuna: " + _("thread %d doesn't exists!") % tid)
+        print(f"tuna: thread {tid} doesn't exist!")
         return
 
     pinfo = ps[tid]
     cmdline = procfs.process_cmdline(pinfo)
     help, title = tuna.kthread_help_plain_text(tid, cmdline)
-    print("%s\n\n%s" % (title, _(help)))
+    print(title, "\n\n")
+    if help.isspace():
+        help = "No help description available."
+    print(help)
 
 
 def save(cpu_list, thread_list, filename):
@@ -295,7 +298,7 @@ def ps_show_header(has_ctxt_switch_info, cgroups=False):
 
 def ps_show_sockets(pid, ps, inodes, inode_re, indent=0):
     header_printed = False
-    dirname = "/proc/%s/fd" % pid
+    dirname = f"/proc/{pid}/fd"
     try:
         filenames = os.listdir(dirname)
     except:  # Process died
@@ -688,7 +691,7 @@ def main():
         try:
             tuna.threads_set_priority(args.thread_list, args.priority,
args.affect_children)
         except OSError as err:
-            print("tuna: %s" % err)
+            print(f"tuna: {err}")
             sys.exit(2)
 
     elif args.command in ['show_configs']:
@@ -705,7 +708,7 @@ def main():
         spread = args.command in ['spread', 'x']
 
         if not (args.thread_list or args.irq_list):
-            parser.error("tuna: %s " % (args.command) + _("requires a
thread/irq list!\n"))
+            parser.error(f"tuna: {args.command} requires a thread/irq
list!\n")
 
         if args.thread_list:
             tuna.move_threads_to_cpu(args.cpu_list, args.thread_list, spread=spread)
-- 
2.31.1