Python Re: Searching through a list using regex

Question

I am trying to search through a fairly complicated string that I am retrieving from a website. This is a list of product ID's from a online store. The string is as follows:

['{ "40710": { "params": ["Black", "37"]}, "40711": { "params": ["Black", "37,5"]}, "40712": { "params": ["Black", "38"]}, "40713": { "params": ["Black", "38,5"]}, "40714": { "params": ["Black", "39"]}, "40715": { "params": ["Black", "40"]}, "40716": { "params": ["Black", "40,5"]}, "40717": { "params": ["Black", "41"]} }']

I am hoping to create a dictionary from this data by having the ID(the five digit numbers) as the key, and the size (the two-three digit numbers).

This is what I want the dictionary to look like:

dictionary = {'40710':'37', '40711':'37,5', '40712':'38', '40713':'38,5', '40714':'39', '40715':'40', '40716':'40,5', '40717':'41'}

I don't know if regex is the way to go with this, but everything seems to point to it; however, I really have no idea how to process data like this. I could really use some help here.

Thanks in advance.

have you tried json.loads() and then creating the dict you want from the parsed one? — Below the Radar
– Below the Radar, Commented Feb 28, 2017 at 18:11

Moses Koledoye · Accepted Answer · 2017-02-28 18:14:16Z

5

A dictionary comprehension after converting to a Python object with json.loads should do:

import json

d = {k: v['params'][1] for k, v in json.loads(lst[0]).items()}
print(d)
# {'40710': '37', '40711': '37,5', '40712': '38', '40713': '38,5', '40714': '39', '40715': '40', '40716': '40,5', '40717': '41'}

answered Feb 28, 2017 at 18:14

Moses Koledoye

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2 Comments

Stefan Pochmann Over a year ago

Um, so you changed the question so that your answer works?

David Schwartz Over a year ago

Any chance you could provide an example on how to use json.loads to convert to a python object? I do not know anything about the JSON module in python.

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