[nft PATCH] tests: py: Don't colorize output if stderr is redirected

[Phil Sutter <phil@xxxxxx>]

Cover for calls with '2>/tmp/log' and avoid printing escape sequences to
that file. One could still keep colored output on stdout, but that
required a printing routine for non-errors.

Signed-off-by: Phil Sutter <phil@xxxxxx>
---
 tests/py/nft-test.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tests/py/nft-test.py b/tests/py/nft-test.py
index 04dac8d77b25f..b66a33c21f661 100755
--- a/tests/py/nft-test.py
+++ b/tests/py/nft-test.py
@@ -39,7 +39,7 @@ signal_received = 0
 
 
 class Colors:
-    if sys.stdout.isatty():
+    if sys.stdout.isatty() and sys.stderr.isatty():
         HEADER = '\033[95m'
         GREEN = '\033[92m'
         YELLOW = '\033[93m'
-- 
2.34.1