[PATCH 02/10] libbtrfsutil: change async parameters to async_ in Python bindings

[Omar Sandoval <osandov@osandov.com>]

From: Omar Sandoval <osandov@fb.com>

async became a keyword in Python 3.7, so, e.g., create_subvolume('foo',
async=True) is now a syntax error. Fix it with the Python convention of
adding a trailing underscore to the keyword (async -> async_). This is
what several other Python libraries did to handle this.

Signed-off-by: Omar Sandoval <osandov@fb.com>
---
 libbtrfsutil/python/module.c                | 8 ++++----
 libbtrfsutil/python/subvolume.c             | 4 ++--
 libbtrfsutil/python/tests/test_subvolume.py | 4 ++--
 3 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/libbtrfsutil/python/module.c b/libbtrfsutil/python/module.c
index 2dbdc7be..625cc9c6 100644
--- a/libbtrfsutil/python/module.c
+++ b/libbtrfsutil/python/module.c
@@ -233,22 +233,22 @@ static PyMethodDef btrfsutil_methods[] = {
 	 "this ID instead of the given path"},
 	{"create_subvolume", (PyCFunction)create_subvolume,
 	 METH_VARARGS | METH_KEYWORDS,
-	 "create_subvolume(path, async=False)\n\n"
+	 "create_subvolume(path, async_=False)\n\n"
 	 "Create a new subvolume.\n\n"
 	 "Arguments:\n"
 	 "path -- string, bytes, or path-like object\n"
-	 "async -- create the subvolume without waiting for it to commit to\n"
+	 "async_ -- create the subvolume without waiting for it to commit to\n"
 	 "disk and return the transaction ID"},
 	{"create_snapshot", (PyCFunction)create_snapshot,
 	 METH_VARARGS | METH_KEYWORDS,
-	 "create_snapshot(source, path, recursive=False, read_only=False, async=False)\n\n"
+	 "create_snapshot(source, path, recursive=False, read_only=False, async_=False)\n\n"
 	 "Create a new snapshot.\n\n"
 	 "Arguments:\n"
 	 "source -- string, bytes, path-like object, or open file descriptor\n"
 	 "path -- string, bytes, or path-like object\n"
 	 "recursive -- also snapshot child subvolumes\n"
 	 "read_only -- create a read-only snapshot\n"
-	 "async -- create the subvolume without waiting for it to commit to\n"
+	 "async_ -- create the subvolume without waiting for it to commit to\n"
 	 "disk and return the transaction ID"},
 	{"delete_subvolume", (PyCFunction)delete_subvolume,
 	 METH_VARARGS | METH_KEYWORDS,
diff --git a/libbtrfsutil/python/subvolume.c b/libbtrfsutil/python/subvolume.c
index 6ecde1f6..0f893b91 100644
--- a/libbtrfsutil/python/subvolume.c
+++ b/libbtrfsutil/python/subvolume.c
@@ -322,7 +322,7 @@ PyObject *set_default_subvolume(PyObject *self, PyObject *args, PyObject *kwds)
 
 PyObject *create_subvolume(PyObject *self, PyObject *args, PyObject *kwds)
 {
-	static char *keywords[] = {"path", "async", "qgroup_inherit", NULL};
+	static char *keywords[] = {"path", "async_", "qgroup_inherit", NULL};
 	struct path_arg path = {.allow_fd = false};
 	enum btrfs_util_error err;
 	int async = 0;
@@ -352,7 +352,7 @@ PyObject *create_subvolume(PyObject *self, PyObject *args, PyObject *kwds)
 PyObject *create_snapshot(PyObject *self, PyObject *args, PyObject *kwds)
 {
 	static char *keywords[] = {
-		"source", "path", "recursive", "read_only", "async",
+		"source", "path", "recursive", "read_only", "async_",
 		"qgroup_inherit", NULL,
 	};
 	struct path_arg src = {.allow_fd = true}, dst = {.allow_fd = false};
diff --git a/libbtrfsutil/python/tests/test_subvolume.py b/libbtrfsutil/python/tests/test_subvolume.py
index 0788a564..f2a4cdb8 100644
--- a/libbtrfsutil/python/tests/test_subvolume.py
+++ b/libbtrfsutil/python/tests/test_subvolume.py
@@ -202,7 +202,7 @@ class TestSubvolume(BtrfsTestCase):
         btrfsutil.create_subvolume(subvol + '6//')
         self.assertTrue(btrfsutil.is_subvolume(subvol + '6'))
 
-        transid = btrfsutil.create_subvolume(subvol + '7', async=True)
+        transid = btrfsutil.create_subvolume(subvol + '7', async_=True)
         self.assertTrue(btrfsutil.is_subvolume(subvol + '7'))
         self.assertGreater(transid, 0)
 
@@ -265,7 +265,7 @@ class TestSubvolume(BtrfsTestCase):
         btrfsutil.create_snapshot(subvol, snapshot + '2', recursive=True)
         self.assertTrue(os.path.exists(os.path.join(snapshot + '2', 'nested/more_nested/nested_dir')))
 
-        transid = btrfsutil.create_snapshot(subvol, snapshot + '3', recursive=True, async=True)
+        transid = btrfsutil.create_snapshot(subvol, snapshot + '3', recursive=True, async_=True)
         self.assertTrue(os.path.exists(os.path.join(snapshot + '3', 'nested/more_nested/nested_dir')))
         self.assertGreater(transid, 0)
 
-- 
2.19.1