diff --git a/lib/func_timer.py b/lib/func_timer.py
index 852bbf2..fc339c2 100644
--- a/lib/func_timer.py
+++ b/lib/func_timer.py
@@ -5,11 +5,12 @@
 """
 
 import os
-import sys
 import signal
+import sys
 import time
-import gen_print as gp
+
 import gen_misc as gm
+import gen_print as gp
 import gen_valid as gv
 
 
@@ -30,9 +31,7 @@
     second.  "sleep 2" is a positional parm for the run_key function.
     """
 
-    def __init__(self,
-                 obj_name='func_timer_class'):
-
+    def __init__(self, obj_name="func_timer_class"):
         # Initialize object variables.
         self.__obj_name = obj_name
         self.__func = None
@@ -59,9 +58,11 @@
         buffer += gp.sprint_var(func_name, indent=indent)
         buffer += gp.sprint_varx("time_out", self.__time_out, indent=indent)
         buffer += gp.sprint_varx("child_pid", self.__child_pid, indent=indent)
-        buffer += gp.sprint_varx("original_SIGUSR1_handler",
-                                 self.__original_SIGUSR1_handler,
-                                 indent=indent)
+        buffer += gp.sprint_varx(
+            "original_SIGUSR1_handler",
+            self.__original_SIGUSR1_handler,
+            indent=indent,
+        )
         return buffer
 
     def print_obj(self):
@@ -95,8 +96,7 @@
         if self.__original_SIGUSR1_handler != 0:
             signal.signal(signal.SIGUSR1, self.__original_SIGUSR1_handler)
         try:
-            gp.lprint_timen("Killing child pid " + str(self.__child_pid)
-                            + ".")
+            gp.lprint_timen("Killing child pid " + str(self.__child_pid) + ".")
             os.kill(self.__child_pid, signal.SIGKILL)
         except OSError:
             gp.lprint_timen("Tolerated kill failure.")
@@ -110,9 +110,7 @@
         children = gm.get_child_pids()
         gp.lprint_var(children)
 
-    def timed_out(self,
-                  signal_number,
-                  frame):
+    def timed_out(self, signal_number, frame):
         r"""
         Handle a SIGUSR1 generated by the child process after the time_out has expired.
 
@@ -135,7 +133,6 @@
         raise ValueError(err_msg)
 
     def run(self, func, *args, **kwargs):
-
         r"""
         Run the indicated function with the given args and kwargs and return the value that the function
         returns.  If the time_out value expires, raise a ValueError exception with a detailed error message.
@@ -171,9 +168,9 @@
         # Get self.__time_out value from kwargs.  If kwargs['time_out'] is not present, self.__time_out will
         # default to None.
         self.__time_out = None
-        if 'time_out' in kwargs:
-            self.__time_out = kwargs['time_out']
-            del kwargs['time_out']
+        if "time_out" in kwargs:
+            self.__time_out = kwargs["time_out"]
+            del kwargs["time_out"]
             # Convert "none" string to None.
             try:
                 if self.__time_out.lower() == "none":
@@ -183,12 +180,13 @@
             if self.__time_out is not None:
                 self.__time_out = int(self.__time_out)
                 # Ensure that time_out is non-negative.
-                message = gv.valid_range(self.__time_out, 0,
-                                         var_name="time_out")
+                message = gv.valid_range(
+                    self.__time_out, 0, var_name="time_out"
+                )
                 if message != "":
-                    raise ValueError("\n"
-                                     + gp.sprint_error_report(message,
-                                                              format='long'))
+                    raise ValueError(
+                        "\n" + gp.sprint_error_report(message, format="long")
+                    )
 
         gp.lprint_varx("time_out", self.__time_out)
         self.__child_pid = 0
@@ -200,13 +198,21 @@
             parent_pid = os.getpid()
             self.__child_pid = os.fork()
             if self.__child_pid == 0:
-                gp.dprint_timen("Child timer pid " + str(os.getpid())
-                                + ": Sleeping for " + str(self.__time_out)
-                                + " seconds.")
+                gp.dprint_timen(
+                    "Child timer pid "
+                    + str(os.getpid())
+                    + ": Sleeping for "
+                    + str(self.__time_out)
+                    + " seconds."
+                )
                 time.sleep(self.__time_out)
-                gp.dprint_timen("Child timer pid " + str(os.getpid())
-                                + ": Sending SIGUSR1 to parent pid "
-                                + str(parent_pid) + ".")
+                gp.dprint_timen(
+                    "Child timer pid "
+                    + str(os.getpid())
+                    + ": Sending SIGUSR1 to parent pid "
+                    + str(parent_pid)
+                    + "."
+                )
                 os.kill(parent_pid, signal.SIGUSR1)
                 os._exit(0)