On 2018-06-07 22:40, Daniel Glus wrote: > I'm trying to figure out the entire list of possible encodings for a Python > source file - that is, encodings that can go in a PEP 263 > <https://www.python.org/dev/peps/pep-0263/> encoding specification, like # > -*- encoding: foo -*-. > > Is this list the same as the list given in the documentation for the codecs > library, under "Standard Encodings" > <https://docs.python.org/3.6/library/codecs.html#standard-encodings>? If > not, where can I find the actual list? > > (I know that list is the same as the set of unique values in CPython's > /Lib/encodings/aliases.py > <https://github.com/python/cpython/blob/master/Lib/encodings/aliases.py>, > or equivalently, the set of filenames in /Lib/encodings/ > <https://github.com/python/cpython/blob/master/Lib/encodings/>, but again > I'm not sure.) > -Daniel
It's none of these. To quote PEP 263: > Any encoding which allows processing the first two lines in the way indicated > above is allowed as source code encoding, this includes ASCII compatible > encodings as well as certain multi-byte encodings such as Shift_JIS. It does > not include encodings which use two or more bytes for all characters like > e.g. UTF-16. The reason for this is to keep the encoding detection algorithm > in the tokenizer simple. All of the lists above include encodings like UTF-16 that are not sufficiently ASCII-compatible. Of course, as Terry Reedy writes, > For new code for python 3, don't use an encoding cookie. Use an editor that > can save in utf-8 and tell it to do so if it does not do so by default. -- Thomas -- https://mail.python.org/mailman/listinfo/python-list
