python crypto currencies scraper

Python：简单的加密货币刮擦者

这是一个简单的模块，可从Coin360.com和CoinMarketCap API中检索BTC中的即时加密货币值

如何使用

首先安装软件包

 pip install cryptocurrencies_scraper

基本用法

 from cryptocurrencies_scraper . CurrencyService import Manager
manager = Manager () # Create a new instance of the Manager
manager . update () # Ask the manager to update all currencies values

manager . all_currencies () # returns a dict that contain the currency name and symbol as key and currency information as a list
manager . get_curency ( 'btc' ) # return the list of currency values retrived for bitcoin using symbol
manager . get_curency ( 'bitcoin' ) # return the list of currency values retrived for bitcoin using name 

添加自己的刮板

刮板应扩展CurrentPriceInterface 。这是新刮板的基本方案

 class MySourceForCurrencies ( CurrentPriceInterface ):
    instance = None
    URL = 'https://api.mysource.com/v1/ticker/?limit=3000'
    NAME = "mysource.com"

    @ classmethod
    def get_instance ( cls ) -> 'MySourceForCurrencies' :
        if cls . instance is None :
            cls . instance = MySourceForCurrencies ()
        return cls . instance

    def __init__ ( self ):
        super (). __init__ ()

    def update_currency_list ( self ):
        self . process_data ( requests . get ( self . URL ). json ())

    def process_data ( self , json_data : json ) -> None :
        # Manipulate the the json to be Currency "parsable"
        c = Currency . parse_json ( json_data , self . NAME )
        #When parsed, add it to the index 
        NameIndexes . get_instance (). add_to_index ( c )
        return None

为了使您的刮板工作，您需要将其添加到经理

 from cryptocurrencies_scraper . CurrencyService import Manager
manager = Manager ()
manager . add_source ( MySourceForCurrencies . get_instance ())

# you can also remove a source
manager . remove_source ( MySourceForCurrencies . NAME )

然后在每个manager.update()上。

NameIndex

该类用于内部用来索引所有货币。当添加新货币时，它将按符号和名称（符号upper，name lose case）进行分组

唯一有用的方法是NameIndexes.get_instance().add_to_index(currency) 。在每个更新中，它可以从所有旧值中完整清除。

Currency

这是代表一种货币的对象是结构

 {
    "symbol" : " BTC " ,
    "name" : " Bitcoin " ,
    "valueUSD" : 5513 ,
    "valueBTC" : 1 ,
    "lastUpdate" : 1566531513813 ,
    "source" : " coin360.com " ,
    "changes" : {
        "7d" : -1 ,
        "24h" : -5 ,
        "1h" : -10
    }
 }