This has an identical meaning, and is the more pythonic way of writing it.
Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
CC: Wei Liu <wl@xxxxxxx>
CC: Anthony PERARD <anthony.perard@xxxxxxxxxx>
CC: Alejandro Vallejo <alejandro.vallejo@xxxxxxxxx>
---
  tools/pygrub/src/pygrub | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/pygrub/src/pygrub b/tools/pygrub/src/pygrub
index 327cf51774fc..2c06684d6532 100755
--- a/tools/pygrub/src/pygrub
+++ b/tools/pygrub/src/pygrub
@@ -88,7 +88,7 @@ def downgrade_rlimits():
      # filesystem we set RLIMIT_FSIZE to a high bound, so that the file
      # write permissions are bound.
      fsize = LIMIT_FSIZE
-    if "PYGRUB_MAX_FILE_SIZE_MB" in os.environ.keys():
+    if "PYGRUB_MAX_FILE_SIZE_MB" in os.environ:
          fsize = int(os.environ["PYGRUB_MAX_FILE_SIZE_MB"]) << 20
  
      resource.setrlimit(resource.RLIMIT_FSIZE, (fsize, fsize))