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python - 将带有浮点数的json字符串解析为python中的字符串

问题描述

我正在编写一个使用 python 请求从 URL 读取 json 的类对象。json 字符串很奇怪，因为浮点数、日期和整数都是字符串。 

{
"financialStatementList" : [ {
"symbol" : "HUBS",
"financials" : [ {
  "date" : "2018-12-31",
  "Revenue" : "512980000.0",
  "Revenue Growth" : "0.3657",
  "Cost of Revenue" : "100357000.0",
  "Gross Profit" : "412623000.0",
  "R&D Expenses" : "117603000.0",
  "SG&A Expense" : "343278000.0",
  "Operating Expenses" : "460881000.0",
  "Operating Income" : "-48258000.0",
  "Interest Expense" : "21386000.0",
  "Earnings before Tax" : "-61960000.0",
  "Income Tax Expense" : "1868000.0",
  "Net Income - Non-Controlling int" : "0.0",
  "Net Income - Discontinued ops" : "0.0",
  "Net Income" : "-63828000.0",
  "Preferred Dividends" : "0.0",
  "Net Income Com" : "-63828000.0",
  "EPS" : "-1.66",
  "EPS Diluted" : "-1.66",
  "Weighted Average Shs Out" : "39232269.0",
  "Weighted Average Shs Out (Dil)" : "38529000.0",
  "Dividend per Share" : "0.0",
  "Gross Margin" : "0.8044",
  "EBITDA Margin" : "-0.033",
  "EBIT Margin" : "-0.0791",
  "Profit Margin" : "-0.124",
  "Free Cash Flow margin" : "0.1002",
  "EBITDA" : "-17146000.0",
  "EBIT" : "-40574000.0",
  "Consolidated Income" : "-63828000.0",
  "Earnings Before Tax Margin" : "-0.1208",
  "Net Profit Margin" : "-0.1244"
}

api端点的json示例如下： financialmodelingprep.com

我的问题是，当我对此进行解码时，我最终得到的是对象/字符串，而不是浮点数或整数。

我试过了：

r = requests.get(url, params)
jd = json.loads(r.text)

也：

r = requests.get(url, params)
jd - r.json()

并且，还有使用 kwargs 的变体，例如 parse_float = float 或 parse_float=Decimal

我的最终目标是使用浮点数、整数和日期将其转换为格式。

标签： pythonjsonpython-requests

解决方案

我最终需要为我的 json 解码器编写一个自定义对象挂钩。

我还决定添加一个camelizer来缩短键。

import requests
import re
import json
from datetime import datetime

quarterdateformat = '%Y-%m-%d'


def camelize(string):
    return "".join(string.split(" "))

def convert_types(d):
    for k, v in d.items():
        #print(k, type(v))
        new_v = v
        if type(v) is str:
            #match for float
            if re.match('[-+]?[0-9]*\.[0-9]+', v):  
                new_v = float(v)

            #match for date
            if re.match('([12]\d{3}-(0[1-9]|1[0-2])-(0[1-9]|[12]\d|3[01]))', v):  
                new_v = datetime.strptime(v, quarterdateformat).date()


        d[k] = new_v
    d = {camelize(k): v for k, v in d.items()}
    return d

url = "https://financialmodelingprep.com/api/v3/financials/income-statement/CRM,HUBS"
params = {'datatyupe' : 'json'}
r = requests.get(url, params)
jd= json.loads(r.text, object_hook=convert_types)

convert_types 是对象挂钩函数，它使用正则表达式来查找浮点数和日期并转换它们。Camelizer 用于在对象挂钩的末尾将所有键转换为 CamelCase。

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