Commond "python HelloWorld.py" has a bug?

[yjqiang]

HelloWorld.py:
#!python3
#coding: utf-8
print 'Hello World'

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I use the commond "python HelloWorld.py", trying to run HelloWorld.py in python3. But it looks Pythonista still runs it in python2, because in python3 "print 'Hello World'" is error while in fact it just prints "Hello World" without warning or other messages. I'm not sure whether it's a bug or I misunderstand the commond.

Pythonista 3.0 (300018) iOS 10.1.1 (64-bit iPad6,3)

[jsbain]

I don't think we ever implemented a clean way to run a python3 command from the python2 interpreter, which stash is running in.
(though i vaguely recall ywangd or dgelessus coming up with a C approach, but it was perhaps not too stable, or there was no good way of communicating back and forth)
So right now the python command only supports py2

[ywangd]

@jsbain you are right. There is no good way to communicate back and forth... It is possible to execute a statement in py3 from py2 using C API. But the two interpreters have different environment and nothing is really shared. For an example, the `print` statement would just print to system console instead of stash screen. As far as I see, there is no point trying to support cross interpreter calls (though initially I really wanted and tried).

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On Fri, Dec 2, 2016 at 3:02 PM, jsbain ***@***.***> wrote: I don't think we ever implemented a clean way to run a python3 command from the python2 interpreter, which stash is running in. (though i vaguely recall ywangd or dgelessus coming up with a C approach, but it was perhaps not too stable, or there was no good way of communicating back and forth) So right now the python command only supports py2 — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#222 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ACPFdMd2EPnjhfORgFeaVIUYykd_5UGeks5rD5g8gaJpZM4LB9TB> .

-- ---------------------------------------------------------------------- Life is elsewhere

[yjqiang]

Thanks a lot. And I found this http://omz-software.com/pythonista/docs/ios/urlscheme.html. Maybe we can use URL scheme to get it. But it seems that we can only run a script in the same library and there are too many other limitations.

[jsbain]

You can actually remove the #!python2 from the start of launch_stash, and run stash with the py3 interpreter. IIRC stash basic core works, just some of the external scripts don't (such as git). I am not sure about the python command....

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Sent from my iPad

On Dec 2, 2016, at 3:06 AM, yjqiang ***@***.***> wrote: Thanks a lot. And I found this http://omz-software.com/pythonista/docs/ios/urlscheme.html. Maybe we can use URL scheme to get it. But it seems that we can only run a script in the same library and there are too many other limitations. — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub, or mute the thread.

[yjqiang]

Got it. I just think a lot, trying to make the stash look like bash in linux, like "python3", "python2". But we need the author of Pythonista to help us, like setting more url schemes. But I'm not sure whether it's a good idea.