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from __future__ import annotations
import os
# types
if False:
from typing import IO
trace_file: IO[str] | None = None
if trace_filename := os.environ.get("PYREPL_TRACE"):
trace_file = open(trace_filename, "a")
def trace(line: str, *k: object, **kw: object) -> None:
if trace_file is None:
return
if k or kw:
line = line.format(*k, **kw)
trace_file.write(line + "\n")
trace_file.flush()
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