PASS TEXT ENCODING TO POPEN INSTALL
PASS TEXT ENCODING TO POPEN WINDOWS

The -X warn_default_encoding option and the The default locale-specific encoding is used. It is emitted when the encoding argument is omitted and The current warning and any DeprecationWarning added in the future,Īs well as retaining consistent behavior if later Python versionsĬhange the default, ensuring support for any Python version >=3.10.Īdd a new EncodingWarning warning class as a subclass of Allowing users to pass encoding='locale' to suppress.Reducing the number of omitted encoding arguments in librariesīefore we start emitting a DeprecationWarning by default.If we start emitting DeprecationWarning everywhere the encodingĪrgument is omitted, it will be too noisy and painful.Īlthough this PEP doesn’t propose changing the default encoding, However, such a change will affect many applications and libraries. We might default to it for opening files in the future. Since UTF-8 has become the de-facto standard text encoding, Prepare to change the default encoding to UTF-8 This PEP provides an explicit way to specify the locale encoding. one can forget to pass False as its argument). Specify the locale encoding explicitly, but it is too long and easy (but could change if future versions of Python modify the default)įrom this point of view, open(filename) is not readable code.Įncoding=locale.getpreferredencoding(False) can be used to If the locale encoding is assumed, the behavior is as expected.If UTF-8 is assumed, this may be a bug or a platform-specific script.Performance on Windows, particularly with non-Latin-1 locale encodings

If ASCII is assumed, this isn’t a bug, but may result in decreased.Open(filename) isn’t explicit about which encoding is expected: Explicit way to use locale-specific encoding

PASS TEXT ENCODING TO POPEN WINDOWS

This creates bugs that only happen on Windows see, , ,Įmitting a warning when the encoding argument is omitted will helpįind such mistakes. Some users might expect it to use UTF-8 by default, but the localeĮven Python experts may assume that the default encoding is UTF-8. Non-UTF-8 locales due to not specifying an encoding for a non-ASCIIĪnother example is logging.basicConfig(filename='log.txt').

PASS TEXT ENCODING TO POPEN INSTALL

Of the 4000 most downloaded packages from PyPI, 489 use non-ASCIIĬharacters in their README, and 82 fail to install from source on emoji, author names, copyright symbols, and the like) Such packages if there is at least one non-ASCII character

Motivation Using the default encoding is a common mistakeĭevelopers using macOS or Linux may forget that the default encodingįor example, using long_description = open('README.md').read() in ItĮxplicitly specifies that the locale encoding should be used, silencing A new -X warn_default_encodingĬommand-line option and a new PYTHONWARNDEFAULTENCODING environmentĪ 'locale' argument value for encoding is added too. It is emitted when theĮncoding argument to open() is omitted and the default

Prepare to change the default encoding to UTF-8Īdd a new warning category EncodingWarning.

Explicit way to use locale-specific encoding.

Using the default encoding is a common mistake.

PEP 597 – Add optional EncodingWarning PEP 597 Title Add optional EncodingWarning Author Inada Naoki Status Final Type Standards Track Created 0 Python-Version 3.10 PEP 597 – Add optional EncodingWarning | Python Enhancement Proposals

Pass text encoding to popen