refactor: remove redundant Python 2 code (#1155)

* Remove Python 2 code

* Upgrade Python syntax with pyupgrade

* Upgrade Python syntax with pyupgrade --py3-plus

* Upgrade Python syntax with pyupgrade --py36-plus

* Remove unused imports

1 files changed, 2 insertions, 3 deletions

diff --git a/lab/parse_all.py b/lab/parse_all.py
index b14c1f0e..3b2465d9 100644
--- a/lab/parse_all.py
+++ b/lab/parse_all.py
@@ -3,17 +3,16 @@
 import os
 import sys
 
-from coverage.exceptions import CoverageException
 from coverage.parser import PythonParser
 
 for root, dirnames, filenames in os.walk(sys.argv[1]):
     for filename in filenames:
         if filename.endswith(".py"):
             filename = os.path.join(root, filename)
-            print(":: {}".format(filename))
+            print(f":: {filename}")
             try:
                 par = PythonParser(filename=filename)
                 par.parse_source()
                 par.arcs()
             except Exception as exc:
-                print("  ** {}".format(exc))
+                print(f"  ** {exc}")