如何从字符串中拉出某个段

Question

I'm using an API that is giving me and output formatted as

 ['{"quote":{"symbol":"AAPL"', '"companyName":"Apple Inc."', '"primaryExchange":"Nasdaq Global Select"', '"sector":"Technology"', '"calculationPrice":"close"', '"open":367.88', '"openTime":1593696600532', '"close":364.11', '"closeTime":1593720000277', '"high":370.47', '"low":363.64', '"latestPrice":364.11'}]

...(it keeps going like this with many more categories.)

I am attempting to pull out only the latest price. What would be the best way to do that?

This is what I have but I get a bunch of errors.

string = (data.decode("utf-8"))
    data_v = string.split(',')

    for word in data_v[latestPrice]:
        if word == ["latestPrice"]:
            print(word)


    print(data_v)

Answer 1

Judging by the output this is JSON. To parse this easily use the JSON module (see https://docs.python.org/3/library/json.html ).

If I'm correct you got this output from Yahoo Finance, if this indeed the case don't fetch and parse it manually but use the yfinance module (see https://pypi.org/project/yfinance/ )

Answer 2

You will have to use JSON module to parse this JSON string. You can convert it into dictionary then. I have indented the JSON code for ease of understanding. You can use the following approach,

import json

text_to_parse = """
  {"quote":
     {
         "symbol":"AAPL",
          "companyName":"Apple Inc.",
          "primaryExchange":"Nasdaq Global Select",
          "sector":"Technology",
          "calculationPrice":"close",
          "open":367.88,
          "openTime":1593696600532,
          "close":364.11,
          "closeTime":1593720000277,
          "high":370.47,
          "low":363.64,
          "latestPrice":364.11
     }
 }
"""

parsed_dict = json.loads(text_to_parse)
print(parsed_dict["quote"]["latestPrice"])

When the program is run, it outputs 364.11