How to check (count) are returned data?

I have got this query in Peewee:

return c = Products.get(Products.sku == article).get()

How to check if it returns data?

I tried:

if c.count() > 0:

if len(c) > 0

It does not work for me

This is full code:

try:
    r = self.isProductExist(row['sku'])

    ## if (r.count() == 0):

except peewee.DoesNotExist:

   # Insert product


    def isProductExist(self, article):
      return Products.get(Products.sku == article).get()

Solution

Your code is all kinds of wrong.

First of all, the 2nd call to "get()" is not necessary here:

return c = Products.get(Products.sku == article).get()

Second of all, you are returning an assignment (?) which makes no sense. Change to:

 return Products.get(Products.sku == article)

If the product exists, it will be returned. If not, a DoesNotExist exception will be raised, making it unnecessary to call "count()" anywhere.

To make the code work even if the product is not found:

try:
    return Products.get(Products.sku == article)
except Products.DoesNotExist:
    # Product was not found.
    return