python stdin：UnicodeDecodeError：'utf-8'编解码器无法解码位置 0 中的字节0xca：无效的延续字节

Question

我正在尝试使用stdin(标准输入(作为代码的输入。

这就是我目前的实施方式。我试着看看它是否给出了我想要的输出。

import sys
for i in sys.stdin.readlines():
print(i.strip())

我打算在它给出的地方打印多行字符串

(venv) Test@Test-MacBookPro pythonProject1 % /Users/Test/PycharmProjects/pythonProject1/venv/bin/python /Users/Test/PycharmProjects/pythonProject1/proto_1.py < /Users/Test/PycharmProjects/pythonProject1/venv/bin/python /Users/Test/PycharmProjects/pythonProject1/input.txt    
Traceback (most recent call last):
File "/Users/Test/PycharmProjects/pythonProject1/proto_1.py", line 3, in <module>
for i in sys.stdin.readlines():
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/codecs.py", line 322, in decode
(result, consumed) = self._buffer_decode(data, self.errors, final)
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xca in position 0: invalid continuation byte

这是我使用的输入文件：

apple
banana
carrot
ddddd
eeeee
fffff

有人知道为什么会发生这种事吗？

Answer 1

是的。让我们看看你的命令行：

(venv) Test@Test-MacBookPro pythonProject1 % /Users/Test/PycharmProjects/pythonProject1/venv/bin/python /Users/Test/PycharmProjects/pythonProject1/proto_1.py < /Users/Test/PycharmProjects/pythonProject1/venv/bin/python /Users/Test/PycharmProjects/pythonProject1/input.txt    

删除路径只是为了让它更清楚：

python proto_1.py < python input.txt

您正在将Python解释器可执行文件作为输入文件进行传递。你为什么这么做？只需传递文件名：

/Users/Test/PycharmProjects/pythonProject1/venv/bin/python /Users/Test/PycharmProjects/pythonProject1/proto_1.py < /Users/Test/PycharmProjects/pythonProject1/input.txt