CODEWITHSUNDEEP
pythondjango
praks5432
praks5432

Reputation: 7792

Django Try Except Not Working

I have this code, 

    try:
        print "what"
        newClassName = CourseNameAndCodeAssociation.objects.get(departmentCode__iexact =         nameAndNumberStore[0])
        print newClassName  
    except:
        print "HAHA"

This always prints "HAHA", despite the fact that I've run the newClassName = ... code in console and it's worked.

Why is this happening?

EDIT

def newGetAllInformation(searchTerm):
nameAndNumberStore = modifySearchTerm(searchTerm)
urlStore = modifyUrl(nameAndNumberStore) # need to make the change here -- why not I go to the site, check for Course name - if that is not there switch, if it is  then scrape 
soup = getHtml(urlStore) 
storeOfBooks = []
storeOfBooks = scrape(soup,nameAndNumberStore)
print nameAndNumberStore[0]
try:
    newClassName = CourseNameAndCodeAssociation.objects.get(departmentCode__iexact = nameAndNumberStore[0])
    nameAndNumberStore = modifySearchTerm(newClassName.departmentName + " " + nameAndNumberStore[1])
    urlStore = modifyUrl(nameAndNumberStore)
    soup = getHtml(urlStore)
    storeOfBooks = scrape(soup,nameAndNumberStore)

except:
    print "HAHA"

return storeOfBooks

EDIT After further investigation - that is, entering a valid code manually (which worked), I think that there's something up with taking the code from the array- despite the fact that both are the same data type (string).

so newClassName = CourseNameAndCodeAssociation.objects.get(departmentCode__iexact = "econ") works from file, but newClassName = CourseNameAndCodeAssocition.objects.get(departmentCode__iexact = nameAndNumberStore[0]),where nameAndNumberStore[0] holds econ

Upvotes: 3

Views: 30945

Answers (2)

patrys
patrys

Reputation: 2769

Change it to:

except CourseNameAndCodeAssociation.DoesNotExist:

Each model you create gets its own DoesNotExist exception that extends core ObjectDoesNotExist exception.

Also the best approach is to only use try … except around the precise line that you expect to fail. A more pythonic way to write what you have there would be:

department_code = name_and_number_store[0]
class_names = CourseNameAndCodeAssociation.objects.all()
try:
    new_class_name = class_names.get(departmentCode__iexact=department_code)
except CourseNameAndCodeAssociation.DoesNotExist:
    print "HAHA"
else:
    search_term = u'%s %s' % (new_class_name.departmentName,
                              name_and_number_store[1])
    name_and_number_store = modify_search_term(search_term)
    url_store = modify_url(name_and_number_store)
    soup = get_html(url_store)
    store_of_books = scrape(soup, name_and_number_store)

Please also note that the convention in Python is to use lowercase_underscored_names for variables, attributes and function names and CamelCaseNames for class names (instance names are either variables or attributes).

Upvotes: 2

Michael
Michael

Reputation: 741

Please modify the code to this, run it and tell us what exception you are getting:

try:
    print "what"
    newClassName = CourseNameAndCodeAssociation.objects.get(departmentCode__iexact =         nameAndNumberStore[0])
    print newClassName  
except Exception as e:
    print "HAHA"
    print e

Also, it would probably help to have a debugger installed on your box. I can recommend Eclipse in combination with PyDev, but that is a personal choice. There are lots of great options out there.

Eclipse IDE - download the basic Java version of 120MB

then install this plugin on top of it - Pydev

Upvotes: 10

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