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[PULL,54/72] scripts/qmp-shell: refactor QMPCompleter

Message ID 20210618230455.2891199-55-jsnow@redhat.com (mailing list archive)
State New, archived
Headers show
Series [PULL,01/72] python/pipenv: Update Pipfile.lock | expand

Commit Message

John Snow June 18, 2021, 11:04 p.m. UTC
list is a generic type, but we expect to use strings directly. We could
subclass list[str], but pylint does not presently understand that

Change this class to envelop a list instead of *being* a list, for
simpler mypy typing.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-id: 20210607200649.1840382-25-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
 scripts/qmp/qmp-shell | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)
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diff --git a/scripts/qmp/qmp-shell b/scripts/qmp/qmp-shell
index 847d34890f..73694035b2 100755
--- a/scripts/qmp/qmp-shell
+++ b/scripts/qmp/qmp-shell
@@ -78,9 +78,17 @@  sys.path.append(os.path.join(os.path.dirname(__file__), '..', '..', 'python'))
 from qemu import qmp
-class QMPCompleter(list):
-    def complete(self, text, state):
-        for cmd in self:
+class QMPCompleter:
+    # NB: Python 3.9+ will probably allow us to subclass list[str] directly,
+    # but pylint as of today does not know that List[str] is simply 'list'.
+    def __init__(self) -> None:
+        self._matches: List[str] = []
+    def append(self, value: str) -> None:
+        return self._matches.append(value)
+    def complete(self, text: str, state: int) -> Optional[str]:
+        for cmd in self._matches:
             if cmd.startswith(text):
                 if state == 0:
                     return cmd