Python print and wc with invalid argument leads to OSError

问题

I've come across some (to me) weird behaviour when piping the output of a Python script into wc with invalid arguments.

λ python test.py
Hello!
λ python test.py | wc -li
wc: unknown option -- i
Try 'wc --help' for more information.
Exception ignored in: <_io.TextIOWrapper name='<stdout>' mode='w' encoding='cp1252'>
OSError: [Errno 22] Invalid argument

What is happening here?

My configuration is

• Windows 10
• Cmder
• msysgit 2.5.1.windows.1

来源：https://stackoverflow.com/questions/32555219/python-print-and-wc-with-invalid-argument-leads-to-oserror