diff --git a/check_slapdd_crc32 b/check_slapdd_crc32
index 3426b53..0d6e83b 100755
--- a/check_slapdd_crc32
+++ b/check_slapdd_crc32
@@ -12,7 +12,7 @@ import sys
 
 default_slapdd_path = '/etc/ldap/slapd.d'
 
-### MAIN ####
+# Main
 parser = argparse.ArgumentParser()
 
 parser.add_argument(
@@ -53,7 +53,7 @@ parser.add_argument(
     action='store',
     type=str,
     dest='slapdd_path',
-    help='Default slapd.d directory path (default: %s)' % default_slapdd_path,
+    help=f'Default slapd.d directory path (default: {default_slapdd_path}',
     default=default_slapdd_path
 )
 
@@ -62,7 +62,9 @@ options = parser.parse_args()
 
 # Initialize log
 log = logging.getLogger()
-logformat = logging.Formatter("%(asctime)s - " + os.path.basename(sys.argv[0]) + " - %(levelname)s - %(message)s")
+logformat = logging.Formatter(
+    f'%(asctime)s - {os.path.basename(sys.argv[0])} - %(levelname)s - '
+    '%(message)s')
 
 if options.debug:
     log.setLevel(logging.DEBUG)
@@ -81,6 +83,7 @@ if not options.logfile or options.console:
     logconsole.setFormatter(logformat)
     log.addHandler(logconsole)
 
+
 def check_file(dir_path, file_name):
     """
     Check CRC32 of an LDIF file
@@ -95,31 +98,52 @@ def check_file(dir_path, file_name):
     try:
         with open(path, 'rb') as fd:
             for line in fd.readlines():
-                if line.startswith(b'# AUTO-GENERATED FILE - DO NOT EDIT!! Use ldapmodify.'):
-                    logging.debug('%s: AUTO-GENERATED line detected, pass (%s)', path, line)
+                if line.startswith(
+                    b'# AUTO-GENERATED FILE - DO NOT EDIT!! Use ldapmodify.'
+                ):
+                    logging.debug(
+                        '%s: AUTO-GENERATED line detected, pass (%s)',
+                        path, line)
                     continue
                 if line.startswith(b'# CRC32 '):
-                    logging.debug('%s: CRC32 line detected, retreive current CRC32 value (%s)', path, line)
-                    current_crc32 = re.match('^# CRC32 (.*)$', line.decode()).group(1)
-                    logging.debug('%s: current CRC32 found is "%s"', path, current_crc32)
+                    logging.debug(
+                        '%s: CRC32 line detected, retreive current CRC32 '
+                        'value (%s)',
+                        path, line)
+                    current_crc32 = re.match(
+                        '^# CRC32 (.*)$', line.decode()
+                    ).group(1)
+                    logging.debug(
+                        '%s: current CRC32 found is "%s"',
+                        path, current_crc32)
                     continue
                 lines.append(line)
     except IOError as err:
         logging.error('%s: fail to read file content (%s)', path, err)
         return False
 
-    crc32 = ("%08X" % ((binascii.crc32(b"".join(lines)) & 0xFFFFFFFF) % (1<<32))).lower()
+    # pylint: disable=consider-using-f-string
+    crc32 = (
+        "%08X" % (
+            (binascii.crc32(b"".join(lines)) & 0xFFFFFFFF) % (1 << 32)
+        )
+    ).lower()
     if current_crc32:
         if current_crc32 == crc32:
             log.info('%s: current CRC32 value is correct (%s)', path, crc32)
         else:
-            log.warning('%s: invalid CRC32 value found (%s != %s)', path, current_crc32, crc32)
+            log.warning(
+                '%s: invalid CRC32 value found (%s != %s)',
+                path, current_crc32, crc32)
             fix_crc32(path, crc32, lines)
     else:
-        log.warning('%s: no CRC32 value found. Correct CRC32 value is "%s".', path, crc32)
+        log.warning(
+            '%s: no CRC32 value found. Correct CRC32 value is "%s".',
+            path, crc32)
         fix_crc32(path, crc32, lines)
     return True
 
+
 def fix_crc32(path, crc32, lines):
     """
     Fix CRC32 value of an LDIF file
@@ -143,9 +167,12 @@ def fix_crc32(path, crc32, lines):
         return False
     return True
 
+
 log.info('Checking CRC32 in slapd directory "%s"', options.slapdd_path)
 for dirpath, dnames, fnames in os.walk(options.slapdd_path):
-    log.debug('%s: sub-dirs = "%s", files = "%s"', dirpath, '", "'.join(dnames), '", "'.join(fnames))
+    log.debug(
+        '%s: sub-dirs = "%s", files = "%s"',
+        dirpath, '", "'.join(dnames), '", "'.join(fnames))
     for fname in fnames:
         if fname.endswith('.ldif'):
             check_file(dirpath, fname)