[PATCH v3 05/16] iotests/297: modify is_python_file to work from any CWD

[John Snow <jsnow@redhat.com>]

Add a directory argument to is_python_file to allow it to work correctly
no matter what CWD we happen to run it from. This is done in
anticipation of running the iotests from another directory (./python/).

Signed-off-by: John Snow <jsnow@redhat.com>
---
 tests/qemu-iotests/297 | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/tests/qemu-iotests/297 b/tests/qemu-iotests/297
index b04cba5366..3e86f788fc 100755
--- a/tests/qemu-iotests/297
+++ b/tests/qemu-iotests/297
@@ -39,14 +39,16 @@ SKIP_FILES = (
 )
 
 
-def is_python_file(filename):
-    if not os.path.isfile(filename):
+def is_python_file(filename: str, directory: str = '.') -> bool:
+    filepath = os.path.join(directory, filename)
+
+    if not os.path.isfile(filepath):
         return False
 
     if filename.endswith('.py'):
         return True
 
-    with open(filename, encoding='utf-8') as f:
+    with open(filepath, encoding='utf-8') as f:
         try:
             first_line = f.readline()
             return re.match('^#!.*python', first_line) is not None
-- 
2.31.1