Fix Python 3 syntax warning (is vs ==)

[grml2usb.git] / grml2usb

diff --git a/grml2usb b/grml2usb
index b12cf88..db067d4 100755 (executable)
--- a/grml2usb
+++ b/grml2usb
@@ -804,9 +804,7 @@ def check_for_fat(partition):
                 " (wrong UID/permissions or device/directory not present?)" % partition)
 
     try:
-        udev_info = subprocess.Popen(["/sbin/blkid", "-s", "TYPE", "-o", "value", partition],
-                                     stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True)
-        filesystem = udev_info.communicate()[0].rstrip()
+        filesystem = subprocess.check_output(["/sbin/blkid", "-s", "TYPE", "-o", "value", partition]).decode().rstrip()
 
         if filesystem != "vfat":
             raise CriticalException(
@@ -814,7 +812,7 @@ def check_for_fat(partition):
                     "(Use --fat16 or run mkfs.vfat %s)" % (partition, partition))
 
     except OSError:
-        raise CriticalException("Sorry, /sbin/blkid not available (install e2fsprogs?)")
+        raise CriticalException("Sorry, /sbin/blkid not available (install util-linux?)")
 
 
 def mkdir(directory):
@@ -1690,7 +1688,7 @@ def handle_mbr(device):
                 mbrcode = mbrpath
                 break
 
-        if mbrcode is "":
+        if not mbrcode:
             str_locations = " or ".join(['"%s"' % l for l in mbr_locations])
             logging.error('Cannot find syslinux MBR, install it at %s)',
                           str_locations)