Re: Asynchronous responses example from documentation -- why import time??
Jason Harrison <[email protected]> Wed, 8 Aug 2018 13:19:23 -0700
| Newsgroups | gmane.comp.python.twisted.web |
|---|---|
| Message-ID | <CAHVLaBHQPq6fqQ9efiYU_F1e8BCTHg_6FYrdmHQQOQJZ49UmjQ@mail.gmail.com> |
--===============4611645935029179100== Content-Type: multipart/alternative; boundary="00000000000000b47e0572f23a5a" --00000000000000b47e0572f23a5a Content-Type: text/plain; charset="UTF-8" > On Wed, 8 Aug 2018 at 11:58 AM Jean-Paul Calderone < > [email protected]> wrote: One possible explanation is that it has nothing to do with import time per > se. Instead, *any* change to your source file would have fixed the > problem. This could be because you had "stale" pyc files lying around > (cached bytecode the interpreter *thought* was up-to-date with your source > but was actually outdated). It could also be that your server process was > left running and was still using your old code. Then, for some reason, > after you added the import time your server got the new version of the code > (perhaps you're relying on an auto-reloader and it missed a change, for > example, or you just forgot to restart the server yourself). > > import time itself is definitely not a requirement for arbitrary Twisted > Web-based programs to return a response other than 404. > > Jean-Paul > > Hi Jean-Paul, I made many changes to the example in order to get it to work. So perhaps it's a caching issue, but I can't find any caches. Here's what I'm developing on: - OSX 10.13.6 - I'm using Sublime text, no auto reloaders afaik - python3 --version : Python 3.7.0 - pip3 list: Package Version -------------- ------- attrs 18.1.0 Automat 0.7.0 constantly 15.1.0 dlib 19.15.0 hyperlink 18.0.0 idna 2.7 incremental 17.5.0 numpy 1.15.0 pip 18.0 PyHamcrest 1.9.0 setuptools 39.2.0 six 1.11.0 Twisted 18.7.0 wheel 0.31.1 zope.interface 4.5.0 - running the server using ./asynchronous.py - I don't have any .pyc files in the script directory, possibly because I "chmod +x" the source file and included the #! at the top - I added logging and while the main program (setup of Twisted reactor) logged, the DelayedResource class did not - I added parts of the example at https://twistedmatrix.com/documents/current/web/howto/web-in-60/dynamic-content.html - I changed "resource = DelayedResource()" to "resource = ClockPage()" - I changed the render_GET handler to return the Clock page example output - etc until I stopped getting a 404 - I restarted the server many many times I removed and backed out every change until I got a 404, concluding it was the "import time" line. Any other ideas? --00000000000000b47e0572f23a5a Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable <div dir=3D"ltr"><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">= <blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-= left:1px solid rgb(204,204,204);padding-left:1ex">On Wed, 8 Aug 2018 at 11:= 58 AM=C2=A0=C2=A0Jean-Paul Calderone <<a href=3D"mailto:exarkun@twistedm= atrix.com">[email protected]</a>> wrote:=C2=A0</blockquote><bloc= kquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:= 1px solid rgb(204,204,204);padding-left:1ex">One possible explanation is th= at it has nothing to do with import time per<br> se.=C2=A0 Instead, *any* change to your source file would have fixed the<br= > problem.=C2=A0 This could be because you had "stale" pyc files ly= ing around<br> (cached bytecode the interpreter *thought* was up-to-date with your source<= br> but was actually outdated).=C2=A0 It could also be that your server process= was<br> left running and was still using your old code.=C2=A0 Then, for some reason= ,<br> after you added the import time your server got the new version of the code= <br> (perhaps you're relying on an auto-reloader and it missed a change, for= <br> example, or you just forgot to restart the server yourself).<br> <br> import time itself is definitely not a requirement for arbitrary Twisted<br= > Web-based programs to return a response other than 404.<br> <br> Jean-Paul<br> <br></blockquote><div><br></div><div>Hi Jean-Paul,</div><div><br></div><div= >I made many changes to the example in order to get it to work. So perhaps = it's a caching issue, but I can't find any caches. Here's what = I'm developing on:</div><div><br></div><div><div class=3D"gmail_extra" = style=3D"font-size:small;text-decoration-style:initial;text-decoration-colo= r:initial"><div class=3D"gmail_quote"><div>- OSX 10.13.6</div><div>- I'= m using Sublime text, no auto reloaders afaik</div>- python3 --version : = =C2=A0Python 3.7.0<br>- pip3 list:</div></div><blockquote style=3D"font-siz= e:small;text-decoration-style:initial;text-decoration-color:initial;margin:= 0px 0px 0px 40px;border:none;padding:0px"><div class=3D"gmail_extra"><div c= lass=3D"gmail_quote"><div><div class=3D"gmail_quote">Package=C2=A0 =C2=A0 = =C2=A0 =C2=A0 Version</div></div></div></div><div class=3D"gmail_extra"><di= v class=3D"gmail_quote"><div><div class=3D"gmail_quote">-------------- ----= ---</div></div></div></div><div class=3D"gmail_extra"><div class=3D"gmail_q= uote"><div><div class=3D"gmail_quote">attrs=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 18.1.0=C2=A0</div></div></div></div><div class=3D"gmail_extra"><div cla= ss=3D"gmail_quote"><div><div class=3D"gmail_quote">Automat=C2=A0 =C2=A0 =C2= =A0 =C2=A0 0.7.0=C2=A0=C2=A0</div></div></div></div><div class=3D"gmail_ext= ra"><div class=3D"gmail_quote"><div><div class=3D"gmail_quote">constantly= =C2=A0 =C2=A0 =C2=A015.1.0=C2=A0</div></div></div></div><div class=3D"gmail= _extra"><div class=3D"gmail_quote"><div><div class=3D"gmail_quote">dlib=C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A019.15.0</div></div></div></div><div c= lass=3D"gmail_extra"><div class=3D"gmail_quote"><div><div class=3D"gmail_qu= ote">hyperlink=C2=A0 =C2=A0 =C2=A0 18.0.0=C2=A0</div></div></div></div><div= class=3D"gmail_extra"><div class=3D"gmail_quote"><div><div class=3D"gmail_= quote">idna=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A02.7=C2=A0 =C2=A0=C2=A0<= /div></div></div></div><div class=3D"gmail_extra"><div class=3D"gmail_quote= "><div><div class=3D"gmail_quote">incremental=C2=A0 =C2=A0 17.5.0=C2=A0</di= v></div></div></div><div class=3D"gmail_extra"><div class=3D"gmail_quote"><= div><div class=3D"gmail_quote">numpy=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 1.15= .0=C2=A0</div></div></div></div><div class=3D"gmail_extra"><div class=3D"gm= ail_quote"><div><div class=3D"gmail_quote">pip=C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 18.0=C2=A0 =C2=A0</div></div></div></div><div class=3D"gmail_= extra"><div class=3D"gmail_quote"><div><div class=3D"gmail_quote">PyHamcres= t=C2=A0 =C2=A0 =C2=A01.9.0=C2=A0=C2=A0</div></div></div></div><div class=3D= "gmail_extra"><div class=3D"gmail_quote"><div><div class=3D"gmail_quote">se= tuptools=C2=A0 =C2=A0 =C2=A039.2.0=C2=A0</div></div></div></div><div class= =3D"gmail_extra"><div class=3D"gmail_quote"><div><div class=3D"gmail_quote"= >six=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 1.11.0=C2=A0</div></div></div= ></div><div class=3D"gmail_extra"><div class=3D"gmail_quote"><div><div clas= s=3D"gmail_quote">Twisted=C2=A0 =C2=A0 =C2=A0 =C2=A0 18.7.0=C2=A0</div></di= v></div></div><div class=3D"gmail_extra"><div class=3D"gmail_quote"><div><d= iv class=3D"gmail_quote">wheel=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 0.31.1=C2= =A0</div></div></div></div><div class=3D"gmail_extra"><div class=3D"gmail_q= uote"><div><div class=3D"gmail_quote">zope.interface 4.5.0</div></div></div= ></div></blockquote><div class=3D"gmail_extra" style=3D"font-size:small;tex= t-decoration-style:initial;text-decoration-color:initial"><div class=3D"gma= il_quote"><div class=3D"gmail_quote">- running the server using ./asynchron= ous.py</div></div></div></div><div>- I don't have any .pyc files in the= script directory, possibly because I "chmod +x" the source file = and included the #! at the top<br></div><div>- I added logging and while th= e main program (setup of Twisted reactor) logged, the=C2=A0DelayedResource = class did not</div><div>- I added parts of the example at=C2=A0<a href=3D"h= ttps://twistedmatrix.com/documents/current/web/howto/web-in-60/dynamic-cont= ent.html">https://twistedmatrix.com/documents/current/web/howto/web-in-60/d= ynamic-content.html</a></div><div>- I changed "resource =3D DelayedRes= ource()" to "resource =3D ClockPage()"=C2=A0</div><div>- I c= hanged the render_GET handler to return the Clock page example output</div>= <div>- etc until I stopped getting a 404</div><div>- I restarted the server= many many times</div><div><br></div></div></div><div class=3D"gmail_extra"= ><div class=3D"gmail_quote"><div>I removed and backed out every change unti= l I got a 404, concluding it was the "import time" line.=C2=A0</d= iv><div>Any other ideas?=C2=A0</div></div></div></div> --00000000000000b47e0572f23a5a-- --===============4611645935029179100== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: inline X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KVHdpc3RlZC13 ZWIgbWFpbGluZyBsaXN0ClR3aXN0ZWQtd2ViQHR3aXN0ZWRtYXRyaXguY29tCmh0dHBzOi8vdHdp c3RlZG1hdHJpeC5jb20vY2dpLWJpbi9tYWlsbWFuL2xpc3RpbmZvL3R3aXN0ZWQtd2ViCg== --===============4611645935029179100==--