在PIPE中使用时，PythoncsvWriter会导致"；BrokenPipeError

❯ cat /tmp/test.py
#!/usr/bin/env python3

import csv

with open("/dev/stdout", "w") as f:
    csvwriter = csv.writer(f)
    csvwriter.writerows((_,) for _ in range(10000))

❯ /tmp/test.py > /dev/null
❯ echo $?
0

❯ /tmp/test.py | head > /dev/null
Traceback (most recent call last):
  File "/tmp/test.py", line 7, in <module>
    csvwriter.writerows((_,) for _ in range(10000))
BrokenPipeError: [Errno 32] Broken pipe

During handling of the above exception, another exception occurred:

BrokenPipeError: [Errno 32] Broken pipe

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/tmp/test.py", line 5, in <module>
    with open("/dev/stdout", "w") as f:
BrokenPipeError: [Errno 32] Broken pipe

import os, sys, csv

try:
    with open("/dev/stdout", "w") as f:
        csvwriter = csv.writer(f)
        csvwriter.writerows((_,) for _ in range(10000))
    sys.stdout.flush()
except BrokenPipeError:
    # Python flushes standard streams on exit; redirect remaining output
    # to devnull to avoid another BrokenPipeError at shutdown
    devnull = os.open(os.devnull, os.O_WRONLY)
    os.dup2(devnull, sys.stdout.fileno())
    sys.exit(1)  # Python exits with error code 1 on EPIPE

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