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- Python default language cause problem on txt write install#
- Python default language cause problem on txt write portable#
- Python default language cause problem on txt write code#
- Python default language cause problem on txt write windows#
Omitting encoding is a common mistake when writing portable code.īut when portability does not matter, assuming UTF-8 is not so bad because Why not always warn when encoding is omitted? So the locale encoding should be respected. Std(in|out|err) are likely to be connected to a terminal or other tools. And other tools are assumed to read and write the On the other hand, terminal encoding is assumed to be the same as These files could be downloaded from the Internet or Why not change std(in|out|err) encoding too?Įven when the locale encoding is not UTF-8, there can be many UTF-8 So changing the default encoding of text files to UTF-8 would be betterĮven if UTF-8 mode is enabled by default at some point. The default encoding is not always UTF-8.
Python default language cause problem on txt write windows#
If we enable UTF-8 mode by default, even people using Windows will forget This PEP is not mutually exclusive to UTF-8 mode. (See People assume it is always UTF-8_ above.) Rationale Why not just enable UTF-8 mode by default?
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UnicodeDecodeError caused by assuming the default text encoding is UTF-8. This helps not only when writingįorward-compatible code, but also when investigating an unexpected Deprecation Warningįrom 3.8 onwards, DeprecationWarning is shown when encoding is omitted and These APIs will always use “UTF-8” when opening text files.
Python default language cause problem on txt write code#
getpass.getpass uses the locale encoding when using TTY.Īll other code using the default encoding of TextIOWrapper or open areĪffected.subprocess and os.popen use the locale encoding because the.Pipes and TTY should use the locale encoding: For example, these commands do not cause mojibake regardless of theĪctive code page: > python -c "print('こんにちは')" | more Stdin, stdout, and stderr continue to respect locale encodingĪs well. Unlike UTF-8 mode, locale.getpreferredencoding(False) still respects It still supersedes the default encoding. When there is device encoding ( os.device_encoding(buffer.fileno())), Specificationįrom Python 3.9, the default encoding of TextIOWrapper and open() isĬhanged from locale.getpreferredencoding(False) to “UTF-8”. Until they need to handle text files encoded in encoding other than UTF-8. It would be nice if new programmers are not forced to learn about encoding We can assume new Python programmers who don’t know about encoding (Note that Python 3.9 will be released in 2021.)Īdditionally, the default encoding of Python source files is UTF-8.
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Popular text editors like VS Code or Atom use UTF-8 by default.Įven Microsoft Notepad uses UTF-8 by default since the Windows Written in UTF-8 from the Internet, they are forced to learn about encoding. New programmers may not know about encoding. Python is one of the most popular first programming languages. Using UTF-8 by default is easier on new programmers So changing the default text file encoding based on the active code pageĬonsistent default text encoding will make Python behavior more expectableĪnd easier to learn. So python.exeĮxecuted from the legacy console and from the WSL cannot read text filesīut many Windows users don’t understand which code page is active. Microsoft is using UTF-8 and cp65001 more widely in recent versions ofįor example, “Command Prompt” uses the legacy code page by default.īut the Windows Subsystem for Linux (WSL) changes the active code page toĦ5001, and python.exe can be executed from the WSL. Some tools on Windows change the active code page to 65001 (UTF-8), and
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Python default language cause problem on txt write install#
Other non-ASCII character in the README.md file, many Windows usersĬannot install the package due to a UnicodeDecodeError. Package authors using macOS or Linux may forget that the default encodingįor example, long_description = open("README.md").read() in Motivation People assume it is always UTF-8 This PEP proposes changing the default text encoding to “UTF-8” (hereinafter called “locale encoding”) when encoding is not specified. (If we release 3.9 in 2020, this PEP will applied to 3.10, although deprecation warning is raised from 3.8)Ĭurrently, TextIOWrapper uses locale.getpreferredencoding(False) I believe 2021 is not too early for this change. I propose to change Python’s default text encoding too, from 2021. Microsoft changed default text encoding of notepad.exe to UTF-8 from 2019 May Update!