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IDLE needs syntax highlighting for async and await #73892
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Well, this is pretty self explanatory, when playing with this new features of async and await (https://docs.python.org/3.5/whatsnew/3.5.html#new-features) I found to me surprise that there is no syntax highlighting for it in the IDLE for py3.5 and also for py3.6 So I humbly ask for its addition. Thanks |
I presume you would like 'async' and 'await' highlighted as keywords. However, IDLE takes its definition of 'keyword' from keyword.kwlist. 'Async' and 'await' are currently not on that list as they are not yet keywords.
According to https://www.python.org/dev/peps/pep-0492/#transition-plan, the intention was (is?) to make them keywords in 3.7. As of Feb 11, that had not happened yet. If and when it does, this issue will be taken care of. I may consider adding a special context sensitive case for 3.6, if the colorizer code makes it easily possible. Care is needed since it would be a mistake to mark them as keywords in the above statements. The difficulty is that colorizer uses regexes and a bit of context sensitive code, while python is using a full grammar parse. I believe that either at the beginning of a line and 'async' followed by 'for' or 'with' or 'await' not followed by certain punctuation ('.', ',', or '=') should be treated as a keyword. Yury, does the rule above look about right? 'Await' seems trickier than 'async'. I think it may be possible to add regexes that are not literal words to the kwlist. If so, adding 'async +def ', 'async +for ', 'async +with ', and 'await +[^.,=]' and not worrying about 'beginning or line' or tabs (instead of spaces) between would be easy and probably good enough. |
I plan to do that in the next couple of weeks.
If possible I would make 'async' and 'await' to be always highlighted. Even if a user writes <3.7 code and uses 'async' as a variable, it would still be great to let the user know that there is something wrong with this variable. |
Always coloring 'async' and 'await' is trivial (augment expression and add test line) and acceptable to me. I am a git neophyte and am waiting for workflow development to settle down before working on new setup for git. If you want to submit the change for 3.6.1, go ahead. (But leave issue open.) Otherwise, I will get it into 3.6.2 (and 3.7). Patch is against 3.6 idlelib.colorize, but 3.7 is identical. The test is to run colorizer.py as main module (python -m idlelib.colorize, or F5 in IDLE editor). Click 'Test' button and check that 'async' and 'await' have same color as other keywords. This cannot affect anything in test suite; colorizer is only used by turtledemo, which is not tested, and which will not notice anyway. |
See also bpo-26264 about the “keyword” module |
Yes.
super, what I have to do to put the patch so I can test it? |
David, the easiest thing to do would be to copy and paste the following |
Ok, Done.
and
and they turn ok I also open those modules in their respective idle and run them, ColorDelegator work ok but colorizer throw me this error Traceback (most recent call last):
File "C:\Anaconda3\Lib\idlelib\colorizer.py", line 279, in <module>
verbosity=2, exit=False)
File "C:\Anaconda3\lib\unittest\main.py", line 63, in __init__
self.module = __import__(module)
File "C:\Anaconda3\lib\idlelib\idle_test\test_colorizer.py", line 8, in <module>
from test.support import requires
ImportError: bad magic number in 'test': b'\x03\xf3\r\n'
>>> |
If 'import test' fails that way, then there is a problem either with Anaconda or your installation. You might try deleting .../Lib/test/pycache/init*.pyc. |
I found the problem, it was a test.pyc file that was in my personal folder... once deleted it work perfect the build-in test module should have some other name... |
PR 6846 adds the htest line to all versions (no news). When merged, I will augment the keyword list and add a news blurb for 3.6. |
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