Python unicode popen 或 Popen 读取 unicode 时出错

发布于 2024-09-24 20:51:24 字数 2123 浏览 4 评论 0原文

我有一个程序可以生成以下输出:

             ┌───────────────────────┐
             │10 day weather forecast│
             └───────────────────────┘
▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁
Tonight Sep 27      Clear               54      0 %
Tue Sep 28          Sunny               85/61   0 %
Wed Sep 29          Sunny               86/62   0 %
Thu Sep 30          Sunny               87/65   0 %
Fri Oct 01          Sunny               85/62   0 %
Sat Oct 02          Sunny               81/59   0 %
Sun Oct 03          Sunny               79/56   0 %
Mon Oct 04          Sunny               78/58   0 %
Tue Oct 05          Sunny               81/61   0 %
Wed Oct 06          Sunny               81/61   0 %

Last Updated Sep 27 10:20 p.m. CT
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔

这似乎在该网站上格式不正确,但顶部的下行和底部的上行会导致 unicode 错误。

这是 os.popen 的代码示例,

>>> buffer = popen('10day', 'r').read()
Traceback (most recent call last):
  File "/home/woodnt/python/10_day_forecast.py", line 129, in <module>
    line_lower(51)
  File "/home/woodnt/python/lib/box.py", line 24, in line_lower
    print upper_line * len
UnicodeEncodeError: 'ascii' codec can't encode characters in position 0-50: ordinal not in range(128)
>>> print buffer

             ┌───────────────────────┐
             │10 day weather forecast│
             └───────────────────────┘

>>> 

这与 subprocess.Popen 的代码示例相同:

f = Popen('10day', stdout=PIPE, stdin=PIPE, stderr=PIPE)
o, er = f.communicate()
print o

             ┌───────────────────────┐
             │10 day weather forecast│
             └───────────────────────┘

print er
Traceback (most recent call last):
  File "/home/woodnt/python/10_day_forecast.py", line 129, in <module>
    line_lower(51)
  File "/home/woodnt/python/lib/box.py", line 24, in line_lower
    print upper_line * len
UnicodeEncodeError: 'ascii' codec can't encode characters in position 0-50: ordinal not in range(128)

是否可以在不需要大量“幕后”工作的情况下使其工作,有什么想法吗?我正在学习编程并从 python 开始

I have a program that generates the following output:

             ┌───────────────────────┐
             │10 day weather forecast│
             └───────────────────────┘
▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁
Tonight Sep 27      Clear               54      0 %
Tue Sep 28          Sunny               85/61   0 %
Wed Sep 29          Sunny               86/62   0 %
Thu Sep 30          Sunny               87/65   0 %
Fri Oct 01          Sunny               85/62   0 %
Sat Oct 02          Sunny               81/59   0 %
Sun Oct 03          Sunny               79/56   0 %
Mon Oct 04          Sunny               78/58   0 %
Tue Oct 05          Sunny               81/61   0 %
Wed Oct 06          Sunny               81/61   0 %

Last Updated Sep 27 10:20 p.m. CT
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔

This doesn't seem to format right on this site, but the lower lines at the top and the upper lines at the bottom result in a unicode error.

Here is the code example for os.popen

>>> buffer = popen('10day', 'r').read()
Traceback (most recent call last):
  File "/home/woodnt/python/10_day_forecast.py", line 129, in <module>
    line_lower(51)
  File "/home/woodnt/python/lib/box.py", line 24, in line_lower
    print upper_line * len
UnicodeEncodeError: 'ascii' codec can't encode characters in position 0-50: ordinal not in range(128)
>>> print buffer

             ┌───────────────────────┐
             │10 day weather forecast│
             └───────────────────────┘

>>> 

Here is the same for subprocess.Popen:

f = Popen('10day', stdout=PIPE, stdin=PIPE, stderr=PIPE)
o, er = f.communicate()
print o

             ┌───────────────────────┐
             │10 day weather forecast│
             └───────────────────────┘

print er
Traceback (most recent call last):
  File "/home/woodnt/python/10_day_forecast.py", line 129, in <module>
    line_lower(51)
  File "/home/woodnt/python/lib/box.py", line 24, in line_lower
    print upper_line * len
UnicodeEncodeError: 'ascii' codec can't encode characters in position 0-50: ordinal not in range(128)

Any ideas if this can be made to work without a lot of "under the hood" work? I'm just learning programming and starting with python

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守望孤独 2024-10-01 20:51:24

我想说从控制台运行程序应该可以正常工作,因为 Python 可以猜测终端窗口的控制台编码(美国 Windows 上的 cp437),但是当通过管道运行时,Python 使用默认的 ascii。尝试更改您的程序,将所有 Unicode 输出编码为显式编码,例如:

print (upper_line * len).encode('cp437')

然后,当您从管道读取它时,您可以 < code>decode 返回 Unicode 或直接打印到终端。

I'd say running your program from the console should work correctly because Python can guess the console encoding of the terminal window (cp437 on US Windows), but when run through a pipe Python uses the default of ascii. Try changing your program to encode all Unicode output to an explicit encoding, such as:

print (upper_line * len).encode('cp437')

Then when you read it from the pipe, you can either decode back to Unicode or print it directly to the terminal.

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