diff --git a/pysollib/hint.py b/pysollib/hint.py
index c57cf006..53a3cd83 100644
--- a/pysollib/hint.py
+++ b/pysollib/hint.py
@@ -1073,7 +1073,7 @@ class FreeCellSolver_Hint(Base_Solver_Hint):
             }
         if DEBUG:
             start_time = time.time()
-        if not(use_fc_solve_lib) and progress:
+        if not (use_fc_solve_lib) and progress:
             iter_ = 0
             depth = 0
             states = 0
diff --git a/pysollib/tk/tabpage.py b/pysollib/tk/tabpage.py
index da81a472..60c4bf9e 100644
--- a/pysollib/tk/tabpage.py
+++ b/pysollib/tk/tabpage.py
@@ -117,7 +117,7 @@ class TabPageSet(tkinter.Frame):
         self.pages[pageName]['page'].grid_forget()
         self.pages[pageName]['tab'].destroy()
         self.pages[pageName]['page'].destroy()
-        del(self.pages[pageName])
+        del (self.pages[pageName])
         # handle removing last remaining, or default, or active page
         if not self.pages:  # removed last remaining page
             self.defaultPage = ''
diff --git a/scripts/gen_individual_importing_tests.py b/scripts/gen_individual_importing_tests.py
index e7f99ee8..05a07038 100644
--- a/scripts/gen_individual_importing_tests.py
+++ b/scripts/gen_individual_importing_tests.py
@@ -33,7 +33,9 @@ for module_name in module_names:
         if ((not is_gtk) or (ver == 2 and (not IS_MAC) and (not SKIP_GTK))):
             def fmt(s):
                 return s % {'module_name': module_name, 'ver': ver}
-            open(os.path.join(".", "tests", "individually-importing", fmt("import_v%(ver)d_%(module_name)s.py")), 'w').write(fmt('''#!/usr/bin/env python%(ver)d
+            open(os.path.join(".", "tests", "individually-importing",
+                              fmt("import_v%(ver)d_%(module_name)s.py")),
+                 'w').write(fmt('''#!/usr/bin/env python%(ver)d
 import sys
 print('1..1')
 sys.path.insert(0, ".")