Python script to get free exchange rates from the ECB12.11.17

#!/usr/bin/env python
import sys
import argparse
import requests
import json
import redis
import time
import xmltodict

class Euro_currency():
  def __init__(self):
   self.url = 'http://www.ecb.europa.eu/stats/eurofxref/eurofxref-daily.xml' #free and stable source of daily currency exchange
   self.r = redis.StrictRedis(host='localhost', port=6379, db=0) #ini redis to cache results than check if a redis key exist and request the result
   if(self.r.exists('euro_currency')):
     print('euro_currency exists in redis!')
     self.rates = json.loads(self.r.get('euro_currency'))
   else:
     r  =  requests.get(self.url)
     d = dict(xmltodict.parse(r.text))['gesmes:Envelope']['Cube']['Cube']['Cube']
     self.rates = {'EUR':1}
     for i in d:
        ii = dict(i)
        self.rates[ii['@currency']] = ii['@rate']
   self.r.set('euro_currency',json.dumps(self.rates))
   self.r.expire('euro_currency',7200)

def get_rates(self):
    return self.rates

def convert(self,amount=0,_from=False,_to=False):
    if(_from and _to):
      if not (_from in self.rates):
        return 'From currency not exists'
      if not (_to in self.rates):
        return 'To currency not exists'
      if(_from == 'EUR'):
        return round(float(amount)*float(self.rates[_to]),2)
      else:
        return round(float(amount)/float(self.rates[_from]),2)
    else:
      print(self.rates)

if __name__ == "__main__":
  ap = argparse.ArgumentParser('Rakuten Searches ') #command line argument
  ap.add_argument('--a',help='Amount to convert',required=False)
  ap.add_argument('--f',help='From currecny',required=False)
  ap.add_argument('--t',help='To currecny',required=False)
  ap.add_argument('--r',help='Get all rates',required=False,action='store_true')
  args = ap.parse_args()
  e = Euro_currency()
  if(args.f and args.t and args.a):
    r = e.convert(args.a,args.f,args.t)
  elif(args.r):
    r = e.get_rates()
    print(r)

http://www.ecb.europa.eu/stats/eurofxref/

Anonymous

Python script to get free exchange rates from the ECB12.11.17

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