Error Handling

[Modern Merlin]

Ok so I am COMPLETELY new to PYTHON and Django all together. I am currently working on a form for a django site. In my views.py it sends an email filled with the data from that form. Basically, its an order form that 4 cloumns (Product, Color, Qty, Price/ea) with 10 rows someone can fill out.

What I am trying to do in the email is have it print those for columns as many times as there is a product. So product1 is required and product2-10 is not. Also I should add that I have defined price1-10 for the ability to let the recipient know how much ammount is (it takes the price/ea and multiplies it by the quantity.) Hence the price2 you will see below.

If a customer fills in product1 and product2 for two seperate products, but not any other products I want views.py to quit building the email after product2.

Currently here is what I have to try and handle this:

 try:
        price2 = (float(orderformdata['product_qty2'])) * int(orderformdata['product_price2']);         
        body+= "<tr><td>%s</td><td>%s</td><td>%s</td><td>%s</td><td>%s</td></tr>" % (orderformdata['product_name2'],orderformdata['product_color2'],orderformdata['product_qty2'],orderformdata['product_price2'],price2)
    except:
        if price2 is null
            then
             the result is 'EXIT', termg
        pass

And here is the error I am getting...

ValueError at /order-form/
empty string for float()
Request Method: POST
Exception Type: ValueError
Exception Value: empty string for float()

Any help someone could be with this would be wonderful! Thanks!

MM

[bvdet]

Judging by the error message, the value returned by orderformdata['product_qty2'] is an empty string. Check the dictionary data.

[Modern Merlin]

It is empty, what I need to know is what is the correct way to tell it to quit processing that line and:

a) Either quit processing and send the email or
b) Quit processing that line and go to the next, which would have the same code and so on...

Thanks!

[bvdet]

One way do do that:

if orderformdata['product_qty2']:
    ...process normally...
else:
    ...do something else...

[Modern Merlin]

Doesnt that mean that if it is product2 then process normally and if it isnt then do something else?

If thats what it means thats not what I need it to do. I need it to go through product fields 1-10 If 1-3 have something in them but do not have anything in field 4 then I need it to stop after 3 and email it. If the form had products in field 1-7 then I need it to stop after 7.

Im sorry if Im not making much sense, like I said before, I really am green at this and havent programmed for about a year LOL

[jlm699]

Doesnt that mean that if it is product2 then process normally and if it isnt then do something else?

No, that says that if there is a value in orderformdata['product_qty2'] then do something... else do something else...

Similarly, the following demonstrates:

>>> d = {}
>>> d['a'] = 'test'
>>> d['b'] = 5
>>> d['c'] = ''
>>> bool(d['a'])
True
>>> bool(d['b'])
True
>>> bool(d['c'])
False
>>> 
 

[Modern Merlin]

Aaaah ok I re-read it and realized my mistake.. So is Term not the correct way to leave that or would it be

endif

[jlm699]

Aaaah ok I re-read it and realized my mistake.. So is Term not the correct way to leave that or would it be

endif

Python is all about formatting...

A complete if structure:

print 'Here we go'
a = 7
b = 5
print 'Entering if structure'
 
if a == b:
    print 'Equal'
elif a <= b:
    print 'A is less than or equal to B'
elif a >= b and a != 8 and b > 1:
    print 'A and B satisfied all conditions'
else:
    print 'No conditions were met'
 
# Regular code continues here...
print 'Back from the if structure and into normal processing'
 

[Modern Merlin]

Python is all about formatting...

A complete if structure:

print 'Here we go'
a = 7
b = 5
print 'Entering if structure'
 
if a == b:
    print 'Equal'
elif a <= b:
    print 'A is less than or equal to B'
elif a >= b and a != 8 and b > 1:
    print 'A and B satisfied all conditions'
else:
    print 'No conditions were met'
 
# Regular code continues here...
print 'Back from the if structure and into normal processing'
 

Aaaaah ok! That makes sense... Sorry I didnt respond sooner been very busy!

And btw... That helped immensly! Thanks!