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def _warn_unawaited_coroutine(coro):
from _warnings import warn
msg_lines = [
f"coroutine '{coro.__qualname__}' was never awaited\n"
]
if coro.cr_origin is not None:
import linecache, traceback
def extract():
for filename, lineno, funcname in reversed(coro.cr_origin):
line = linecache.getline(filename, lineno)
yield (filename, lineno, funcname, line)
msg_lines.append("Coroutine created at (most recent call last)\n")
msg_lines += traceback.format_list(list(extract()))
msg = "".join(msg_lines).rstrip("\n")
warn(msg, category=RuntimeWarning, stacklevel=2, source=coro)
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