[PATCH 3/3] tuna: tuna.py use fstrings

[Leah Leshchinsky]

Add fstrings where possible to improve readabilty

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

diff --git a/tuna/tuna.py b/tuna/tuna.py
index 43adb84079e4..fb0ee0b0cfef 100755
--- a/tuna/tuna.py
+++ b/tuna/tuna.py
@@ -58,7 +58,7 @@ def iskthread(pid):
     # in this function, so that they know that the thread vanished and
     # can act accordingly, removing entries from tree views, etc
     try:
-        f = open("/proc/%d/smaps" % pid)
+        f = open(f"/proc/{pid}/smaps")
     except IOError:
         # Thread has vanished
         return True
@@ -88,7 +88,7 @@ def is_irq_thread(cmd):
     return cmd[:4] in ("IRQ-", "irq/")
 
 def threaded_irq_re(irq):
-    return re.compile("(irq/%s-.+|IRQ-%s)" % (irq, irq))
+    return re.compile(f"(irq/{irq}-.+|IRQ-{irq})")
 
 # FIXME: Move to python-linux-procfs
 def has_threaded_irqs(ps):
@@ -96,10 +96,10 @@ def has_threaded_irqs(ps):
     return len(ps.find_by_regex(irq_re)) > 0
 
 def set_irq_affinity_filename(filename, bitmasklist):
-    pathname = "/proc/irq/%s" % filename
+    pathname = "/proc/irq/{filename}"
     f = open(pathname, "w")
     text = ",".join(["%x" % a for a in bitmasklist])
-    f.write("%s\n" % text)
+    f.write(f"{text}\n")
     try:
         f.close()
     except IOError:
@@ -225,7 +225,7 @@ def move_threads_to_cpu(cpus, pid_list, set_affinity_warning=None,
spread=False)
             if pid not in ps:
                 continue
 
-            threads = procfs.pidstats("/proc/%d/task" % pid)
+            threads = procfs.pidstats(f"/proc/{pid}/task")
             for tid in list(threads.keys()):
                 try:
                     curr_affinity = os.sched_getaffinity(tid)
@@ -320,11 +320,11 @@ def affinity_remove_cpus(affinity, cpus, nr_cpus):
 # Should be moved to python_linux_procfs.interrupts, shared with
interrupts.parse_affinity, etc.
 def parse_irq_affinity_filename(filename, nr_cpus):
     try:
-        f = open("/proc/irq/%s" % filename)
+        f = open(f"/proc/irq/{filename}")
     except IOError as err:
         if procfs.is_s390():
             print("This operation is not supported on s390", file=sys.stderr)
-            print("tuna: %s" % err, file=sys.stderr)
+            print(f"tuna: {err}", file=sys.stderr)
             sys.exit(2)
 
     line = f.readline()
@@ -624,19 +624,19 @@ def run_command(cmd, policy, rtprio, cpu_list, background):
             try:
                 thread_set_priority(pid, policy, rtprio)
             except (SystemError, OSError) as err:
-                print("tuna: %s" % err)
+                print(f"tuna: {err}")
                 sys.exit(2)
         if cpu_list:
             try:
                 os.sched_setaffinity(pid, cpu_list)
             except (SystemError, OSError) as err:
-                print("tuna: %s" % err)
+                print(f"tuna: {err}")
                 sys.exit(2)
 
         try:
             os.execvp(cmd_list[0], cmd_list)
         except (SystemError, OSError) as err:
-            print("tuna: %s" % err)
+            print(f"tuna: {err}")
             sys.exit(2)
     else:
         if not background:
-- 
2.31.1