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gh-141968: Use take_bytes to simplify and remove copy from pyrepl BaseEventQueue #149852

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gh-141968: Use take_bytes to simplify and remove copy from pyrepl BaseEventQueue #149852

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219aea8
gh-141968: Use `take_bytes` to simplify and remove copy from pyrepl
lgeiger May 14, 2026
bf42a7b
Ignore mypy error due to missing type def
lgeiger May 14, 2026
4640fa2
Remove BaseEventQueue.flush_buf
lgeiger May 15, 2026
4887168
Add mypy type ignores to make CI happy
lgeiger May 15, 2026
4089d2a
Prefer bytearray.resize(0)
lgeiger May 16, 2026
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12 changes: 5 additions & 7 deletions Lib/_pyrepl/base_eventqueue.py
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Original file line number Diff line number Diff line change
Expand Up @@ -54,13 +54,11 @@ def empty(self) -> bool:
"""
return not self.events

def flush_buf(self) -> bytearray:
def flush_buf(self) -> bytes:
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"""
Flushes the buffer and returns its contents.
"""
old = self.buf
self.buf = bytearray()
return old
return self.buf.take_bytes() # type: ignore[attr-defined, no-any-return]
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def insert(self, event: Event) -> None:
"""
Expand All @@ -87,7 +85,7 @@ def push(self, char: int | bytes) -> None:
if isinstance(k, dict):
self.keymap = k
else:
self.insert(Event('key', k, bytes(self.flush_buf())))
self.insert(Event('key', k, self.flush_buf()))
self.keymap = self.compiled_keymap

elif self.buf and self.buf[0] == 27: # escape
Expand All @@ -102,9 +100,9 @@ def push(self, char: int | bytes) -> None:

else:
try:
decoded = bytes(self.buf).decode(self.encoding)
decoded = self.buf.decode(self.encoding)
except UnicodeError:
return
else:
self.insert(Event('key', decoded, bytes(self.flush_buf())))
self.insert(Event('key', decoded, self.flush_buf()))
self.keymap = self.compiled_keymap
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