[PATCH] 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: getopt

diff --git a/tuna-cmd.py b/tuna-cmd.py
index 79e33371837e..75b63da972c2 100755
--- a/tuna-cmd.py
+++ b/tuna-cmd.py
@@ -176,13 +176,16 @@ 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):
@@ -208,7 +211,7 @@ 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
@@ -650,7 +653,7 @@ def main():
             try:
                 gui_refresh=int(a)
             except Exception as err:
-                print("tuna: --refresh %s" % err)
+                print(f"tuna: --refresh {err}")
                 sys.exit(2)
         elif o in ("-d", "--disable_perf"):
             run_gui = True
@@ -679,7 +682,7 @@ def main():
                 try:
                     tuna.threads_set_priority(thread_list, a, affect_children)
                 except OSError as err:
-                    print("tuna: %s" % err)
+                    print(f"tuna: {err}")
                     sys.exit(2)
         elif o in ("-P", "--show_threads"):
             # If the user specified process names that weren't
-- 
2.31.1