不输出到终端时编码错误

Question

我想知道为什么捕获（管道）stdout会导致一个空文件，而不捕获它会导致正常的输出。当输出到终端时，我没有得到编码错误。只有在管道输出时。你知道吗

当输出到管道而不是终端时，编码是否更改？也许终端可以发送支持的编码信号，而管道默认为ASCII？你知道吗

管道输出

$ curl -s 'https://www.sunwind.no/Outlet/'  | html2text | wc
Traceback (most recent call last):
  File "<string>", line 1, in <module>
UnicodeEncodeError: 'ascii' codec can't encode character u'\xe5' in position 212: ordinal not in range(128)
      0       0       0

未捕获输出

curl -s 'https://www.sunwind.no/Outlet/' | html2text
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"Klikk her for å gå til forsiden")
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"Klikk her for å gå til Sunwinds svenske side")
[![](https://www.sunwind.no/images/flag/FINL0001.GIF)](https://www.sunwind.fi
"Klikk her for å gå til Sunwinds finske side")
[![](https://www.sunwind.no/images/flag/DENM0001.GIF)](https://www.sunwind.no/page/?pid=132
"Klikk her for å gå til Sunwinds danske side")
[![](https://www.sunwind.no/images/flag/UK0001.GIF)](https://www.sunwind.no/en/
"Klikk her for å gå til engelsk side")

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etc

html2text别名是一行python命令：

alias html2text='python -c "import sys,html2text;sys.stdout.write(html2text.html2text(sys.stdin.read().decode(\"utf-8\")))"'

这是我第一次遇到这种行为。我的单行程序不处理管道输出吗？你知道吗

Answer 1

只要我的2美分，因为输入数据被正确解码（.decode(\"utf-8\")），输出数据也需要被编码（.encode(\"utf-8\")）。因此，一行代码的工作版本应该如下所示。这个问题需要很长时间来研究。你知道吗

alias html2text='python2 -c "import sys,html2text;sys.stdout.write(html2text.html2text(sys.stdin.read().decode(\"utf-8\")).encode(\"utf-8\"))"'
curl -s 'https://www.sunwind.no/Outlet/'  | html2text | wc
    764    1839   29329

Answer 2

只要我的2美分，因为输入数据被正确解码（.decode(\"utf-8\")），输出数据也需要被编码（.encode(\"utf-8\")）。因此，一行代码的工作版本应该如下所示。这个问题需要很长时间来研究。你知道吗

alias html2text='python2 -c "import sys,html2text;sys.stdout.write(html2text.html2text(sys.stdin.read().decode(\"utf-8\")).encode(\"utf-8\"))"'
curl -s 'https://www.sunwind.no/Outlet/'  | html2text | wc
    764    1839   29329