handling of view syntax error vs exceptions in django

Question

I am using django 1.2.7 and python 2.6. If I use this code: (with an identation error on porpuse)

def myview(request):
    try:
        if x:
        print 'x'
    except:
        return HttpResponseServerError('bazinga')

then I don't get my response. I get django 500 response.

but if I change the code to this:

  def myview(request):
    try:
        if x:
            print 'x'
    except:
        return HttpResponseServerError('bazinga')

now I get my own 500 with the bazinga written.

How can I catch the identation error in the first example ?

Just as my try-except catch the exception in the 2nd example.

score 5 · Accepted Answer · answered Dec 25 '12 at 11:22

5

Don't try to make Django return a nice response in the case of a syntax error. That will be difficult, and will involve having code of your own just for this case, and that code itself will need to be error-free, etc.

Instead, put that effort into an automated test suite that will make it easy to find those errors before you deploy your code.

answered Dec 25 '12 at 11:22

Ned Batchelder

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Depending on your editor/IDE, you can install background linters that scans you code on the fly for trivial errors. – Armando Pérez Marqués Dec 25 '12 at 23:56

score 2 · Answer 2 · answered Dec 25 '12 at 10:57

2

Syntax errors can be detected trivially as you don't need to run the code but only to import it.

There's no reason you should try to catch them, just fix them.

answered Dec 25 '12 at 10:57

Thomas Orozco

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i want to catch them because i want to be able control the response in case there is an error in my code. – yossi Dec 25 '12 at 11:06
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@yossi All I'm saying here is that it is not worth the effort. I understood your goal very well. – Thomas Orozco Dec 25 '12 at 14:47

score 0 · Answer 3 · edited May 23 '17 at 11:56

0

You can catch syntax (And Indentation) errors out of your code. Look here for more info: How to catch IndentationError

edited May 23 '17 at 11:56

Community

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answered Dec 25 '12 at 11:06

Vasisualiy

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score 0 · Answer 4 · answered Dec 30 '12 at 13:13

0

Syntax errors are not run time errors, they occur at compile time. As far as I know, you can't catch them with a try/except block.

answered Dec 30 '12 at 13:13

Daniel Roseman

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Thanks. Would you recommend any solution for catching syntax errors in Django? – kta May 16 '23 at 02:39

handling of view syntax error vs exceptions in django

4 Answers4