mypy generates following warning Item "None" of "Optional[IO[bytes]]" has no attribute "close" for the p1.stdout.close()line. How can I fix this error?
#!/usr/bin/env python3
filename = "filename.py"
p1 = subprocess.Popen(["ls", "-ln", filename,], stdout=subprocess.PIPE,)
p2 = subprocess.Popen(["awk", "{print $1}"], stdin=p1.stdout, stdout=subprocess.PIPE)
p1.stdout.close() # <== `Item "None" of "Optional[IO[bytes]]" has no
# attribute "close"`
close() is an abstractmethod() method in the typing.py file
@abstractmethod
def close(self) -> None:
pass