pserve.exe syntax error on windows with --reload

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onl...@gmail.com

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Sep 24, 2016, 11:36:51 AM9/24/16
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I have created a pyramid application using pcreate, now when I try to run it using pserve with --reload, I get following error

 SyntaxError: Non-ASCII character '\x90' in file <path>\pserve.exe on line 1, but no encoding declared; see http://python.org/dev/peps/pep-0263/ for details
Interestingly this error shows up only when I use --reload, if I remove reload it starts fine.

After debugging, I see another file pserve-script.py at the same location of pserve.exe and this python script is internally called by pserve.exe ( I don't understand why? when pserve itself is executable)

The above pserve-script.py has following content and I assume the above error is because of following shebang.

#!c:\<folder-path>\Scripts\python.exe
# EASY-INSTALL-ENTRY-SCRIPT: 'pyramid','console_scripts','pserve'
__requires__ = 'pyramid'
import re
import sys
from pkg_resources import load_entry_point

if __name__ == '__main__':
    sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
    sys.exit(
        load_entry_point('pyramid', 'console_scripts', 'pserve')()
    )

Bert JW Regeer

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Sep 24, 2016, 4:00:37 PM9/24/16
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What is <folder path>

Does it have a non-ascii character in the folder path?

Try moving your project to C:\Projects\myproject or something similar, and that should hopefully avoid the error.

Bert
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Marius Gedminas

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Sep 25, 2016, 3:00:01 AM9/25/16
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On Sat, Sep 24, 2016 at 04:49:45AM -0700, onl...@gmail.com wrote:
> I have created a pyramid application using pcreate, now when I try to run it
> using pserve with --reload, I get following error
>
>  SyntaxError: Non-ASCII character '\x90' in file <path>\pserve.exe on line 1,
> but no encoding declared; see http://python.org/dev/peps/pep-0263/ for details
> Interestingly this error shows up only when I use --reload, if I remove reload
> it starts fine.

I bet it's because of this bit of code:
https://github.com/Pylons/pyramid/blob/master/pyramid/scripts/pserve.py#L267-L270

pserve is trying to run

/path/to/python.exe /path/to/pserve.exe other args

in a subprocess, and python doesn't like interpreting .exe files. But
then https://github.com/Pylons/pyramid/issues/2126 explicitly made it be
that way, with reports that everything works fine? I don't understand
Windows :(


File a new bug maybe?

Regards,
Marius Gedminas
--
Despite all appearances, your boss is a thinking, feeling, human being.
signature.asc

Bert JW Regeer

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Sep 25, 2016, 12:19:07 PM9/25/16
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> On Sep 25, 2016, at 00:59 , Marius Gedminas <mar...@gedmin.as> wrote:
>
> On Sat, Sep 24, 2016 at 04:49:45AM -0700, onl...@gmail.com wrote:
>> I have created a pyramid application using pcreate, now when I try to run it
>> using pserve with --reload, I get following error
>>
>> SyntaxError: Non-ASCII character '\x90' in file <path>\pserve.exe on line 1,
>> but no encoding declared; see http://python.org/dev/peps/pep-0263/ for details
>> Interestingly this error shows up only when I use --reload, if I remove reload
>> it starts fine.
>
> I bet it's because of this bit of code:
> https://github.com/Pylons/pyramid/blob/master/pyramid/scripts/pserve.py#L267-L270
>
> pserve is trying to run
>
> /path/to/python.exe /path/to/pserve.exe other args

It shouldn’t be running /path/to/python.exe /path/to/pserve.exe, it should be running /path/to/pserve.exe directly. That’s what that fix should have been doing. When you run /path/to/pserve.exe the script name in sys.argv[0] is set to ‘pserve’ without any extension on it at all. That fix added .exe to once again make it pserve.exe which can then be executed by popen.

>
> in a subprocess, and python doesn't like interpreting .exe files. But
> then https://github.com/Pylons/pyramid/issues/2126 explicitly made it be
> that way, with reports that everything works fine? I don't understand
> Windows :(
>
>
> File a new bug maybe?
>
> Regards,
> Marius Gedminas
> --
> Despite all appearances, your boss is a thinking, feeling, human being.
>
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