CODEWITHSUNDEEP
pythondjango
coder
coder

Reputation: 51

Error while fetching values from list of dictionaries inside a dictionary in a tuple

Edit - Made changes to the code from where I'm receiving the jsondata and converting it into a dictionary. (Sorry for the inconvenience and confusion caused)

I need to fetch values from product_name which is a key in the list of dictionaries inside a dictionary.

products = ([{'product_id': 'WVXNR', 
'product_name': 'BASUNDI 200 ML', 
'product_description': 'A traditional taste of sweetened condensed milk with rich creamy flavor, can be served warm or chilled.', 
'product_images': '/images/productImages/Basundi_lH9o5wD.png',
'product_price': 80.0, 
'gst': 0, 
'product_status': None, 
'discount': None, 
'rating': None, 
'product_quantity': 1, 
'get_product_total': 80.0, 
'get_product_total_gst': 0.0}, 
{'product_id': 'MEADN', 
'product_name': 'MASALA MILK', 
'product_description': 'Blended with dry fruit and saffron is rich in vitamins and minerals, this healthy and nutritious milk is an all-time favorite!!', 
'product_images': '/images/productImages/masala_milk_BlypKDx.png',
'product_price': 190.0, 
'gst': 0, 
'product_status': None, 
'discount': None, 
'rating': None, 
'product_quantity': 1, 
'get_product_total': 190.0, 
'get_product_total_gst': 0.0
}],)

What I've tried Assuming products is a variable containing all the data

product_name = [x for x in products['product_name']]

Correction above

Doing this would give me

tuple indices must be integers or slices, not str

What I need

product_name = ['BASUNDI 200 ML', 'MASALA MILK']

Upvotes: 0

Views: 65

Answers (3)

will-hedges
will-hedges

Reputation: 1284

Thanks for the edit. Watch the stray comma at the end of your data (this creates a tuple, rather than a list).

products = ([{'product_id': 'WVXNR',
'product_name': 'BASUNDI 200 ML',
'product_description': 'A traditional taste of sweetened condensed milk with rich creamy flavor, can be served warm or chilled.',
'product_images': '/images/productImages/Basundi_lH9o5wD.png',
'product_price': 80.0,
'gst': 0,
'product_status': None,
'discount': None,
'rating': None,
'product_quantity': 1,
'get_product_total': 80.0,
'get_product_total_gst': 0.0},
{'product_id': 'MEADN',
'product_name': 'MASALA MILK',
'product_description': 'Blended with dry fruit and saffron is rich in vitamins and minerals, this healthy and nutritious milk is an all-time favorite!!',
'product_images': '/images/productImages/masala_milk_BlypKDx.png',
'product_price': 190.0,
'gst': 0,
'product_status': None,
'discount': None,
'rating': None,
'product_quantity': 1,
'get_product_total': 190.0,
'get_product_total_gst': 0.0
}])

The following list comprehension should return what you need now.

product_names = [d['product_name'] for d in products]
print(product_names)

Upvotes: 0

Ash Singh
Ash Singh

Reputation: 4847

Since product_data is a list which is a iterable, you can use map function with lambda function that extracts from the dict:

product_names = list(map(lambda product: product["product_name"], product_data))

Upvotes: 0

Ren
Ren

Reputation: 4680

Assuming that

products = product_data['products']

results in

[{'product_id': 'NNPTA', 'product_name': 'CHASS 200 ML', 'product_description': 'The secret recipe of butter milk from Punjab Sind Foods is a refresher any time! an excellent source of probiotics and a must have with every meal for better digestion.', 'product_images': '/images/productImages/Masala_Chass_yGg9K92.png', 'product_price': 28.0, 'gst': 0, 'product_status': None, 'discount': None, 'rating': None, 'product_quantity': 2, 'get_product_total': 56.0, 'get_product_total_gst': 0.0}, {'product_id': 'HZCNM', 'product_name': 'FRESH MILK 1 LTR', 'product_description': 'Our milk is free of chemical, pesticides and preservatives. We are committed to provide hygienic and healthy milk every time you order from us.', 'product_images': '/images/productImages/Fresh_milk_IL.png', 'product_price': 62.0, 'gst': 0, 'product_status': None, 'discount': None, 'rating': None, 'product_quantity': 1, 'get_product_total': 62.0, 'get_product_total_gst': 0.0}]

Then what you are looking for can be obtained with:

product_names = [x['product_name'] for x in products]

Upvotes: 1

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