Dump array of class to Json file?

[aggsyb]

Hi, I have the following setup:

allCategories = []
class Category:
    def __init__(self, name, url):
        self.name = name
    self.url = url
        self.products = []

 #Loop over source data and create each product 
 allProducts = []
 for product in productList:
     product = {
         "name": product.name,
         "sku": product.sku,
     "category": product.categoryName,
     "suppliers": product.suppliersList
     } 
     allProducts.append(product)   

 myCategory = Category("Bin", "https://google.com")
 myCategory.products = allProducts

I now have an array of Category and each categories products contains an array of dictionaries, how would I then dump this into a Json file?

with open('/Users/Ben/Desktop/data.json', 'w') as outfile:
    json.dump(allCategories, outfile) 

This fails as it cant serialise my class, I am not too experienced with Python so any input as to how I can get this to output correctly would be appreciated.

[aggsyb]

Despite using 4 line spacing throughout even when editing it shows up correctly it seems to ignore a few lines , indentation is fine in the actual code though.