Code for How to Make a Currency Converter in Python Tutorial

currency_converter_xrates.py

import requests from bs4 import BeautifulSoup as bs from dateutil.parser import parse from pprint import pprint def get_exchange_list_xrates(currency, amount=1): # make the request to x-rates.com to get current exchange rates for common currencies content = requests.get(f"https://www.x-rates.com/table/?from={currency}&amount={amount}").content # initialize beautifulsoup soup = bs(content, "html.parser") # get the last updated time price_datetime = parse(soup.find_all("span", attrs={"class": "ratesTimestamp"})[1].text) # get the exchange rates tables exchange_tables = soup.find_all("table") exchange_rates = {} for exchange_table in exchange_tables: for tr in exchange_table.find_all("tr"): # for each row in the table tds = tr.find_all("td") if tds: currency = tds[0].text # get the exchange rate exchange_rate = float(tds[1].text) exchange_rates[currency] = exchange_rate return price_datetime, exchange_rates if __name__ == "__main__": import sys source_currency = sys.argv[1] amount = float(sys.argv[2]) price_datetime, exchange_rates = get_exchange_list_xrates(source_currency, amount) print("Last updated:", price_datetime) pprint(exchange_rates)

currency_converter_xe.py

import requests from bs4 import BeautifulSoup as bs import re from dateutil.parser import parse def convert_currency_xe(src, dst, amount): def get_digits(text): """Returns the digits and dots only from an input `text` as a float Args: text (str): Target text to parse """ new_text = "" for c in text: if c.isdigit() or c == ".": new_text += c return float(new_text) url = f"https://www.xe.com/currencyconverter/convert/?Amount={amount}&From={src}&To={dst}" content = requests.get(url).content soup = bs(content, "html.parser") exchange_rate_html = soup.find_all("p")[2] # get the last updated datetime last_updated_datetime = parse(re.search(r"Last updated (.+)", exchange_rate_html.parent.parent.find_all("div")[-2].text).group()[12:]) return last_updated_datetime, get_digits(exchange_rate_html.text) if __name__ == "__main__": import sys source_currency = sys.argv[1] destination_currency = sys.argv[2] amount = float(sys.argv[3]) last_updated_datetime, exchange_rate = convert_currency_xe(source_currency, destination_currency, amount) print("Last updated datetime:", last_updated_datetime) print(f"{amount} {source_currency} = {exchange_rate} {destination_currency}") 

currency_converter_yahoofin.py

import yahoo_fin.stock_info as si from datetime import datetime, timedelta def convert_currency_yahoofin(src, dst, amount): # construct the currency pair symbol symbol = f"{src}{dst}=X" # extract minute data of the recent 2 days latest_data = si.get_data(symbol, interval="1m", start_date=datetime.now() - timedelta(days=2)) # get the latest datetime last_updated_datetime = latest_data.index[-1].to_pydatetime() # get the latest price latest_price = latest_data.iloc[-1].close # return the latest datetime with the converted amount return last_updated_datetime, latest_price * amount if __name__ == "__main__": import sys source_currency = sys.argv[1] destination_currency = sys.argv[2] amount = float(sys.argv[3]) last_updated_datetime, exchange_rate = convert_currency_yahoofin(source_currency, destination_currency, amount) print("Last updated datetime:", last_updated_datetime) print(f"{amount} {source_currency} = {exchange_rate} {destination_currency}")

currency_converter_erapi.py

import requests from dateutil.parser import parse def get_all_exchange_rates_erapi(src): url = f"https://open.er-api.com/v6/latest/{src}" # request the open ExchangeRate API and convert to Python dict using .json() data = requests.get(url).json() if data["result"] == "success": # request successful # get the last updated datetime last_updated_datetime = parse(data["time_last_update_utc"]) # get the exchange rates exchange_rates = data["rates"] return last_updated_datetime, exchange_rates def convert_currency_erapi(src, dst, amount): # get all the exchange rates last_updated_datetime, exchange_rates = get_all_exchange_rates_erapi(src) # convert by simply getting the target currency exchange rate and multiply by the amount return last_updated_datetime, exchange_rates[dst] * amount if __name__ == "__main__": import sys source_currency = sys.argv[1] destination_currency = sys.argv[2] amount = float(sys.argv[3]) last_updated_datetime, exchange_rate = convert_currency_erapi(source_currency, destination_currency, amount) print("Last updated datetime:", last_updated_datetime) print(f"{amount} {source_currency} = {exchange_rate} {destination_currency}") 

currency_converter_fixerapi.py

import requests from datetime import date, datetime API_KEY = "8c3dce10dc5fdb6ec1f555a1504b1373" # API_KEY = "<YOUR_API_KEY_HERE>" def convert_currency_fixerapi_free(src, dst, amount): """converts `amount` from the `src` currency to `dst` using the free account""" url = f"http://data.fixer.io/api/latest?access_key={API_KEY}&symbols={src},{dst}&format=1" data = requests.get(url).json() if data["success"]: # request successful rates = data["rates"] # since we have the rate for our currency to src and dst, we can get exchange rate between both # using below calculation exchange_rate = 1 / rates[src] * rates[dst] last_updated_datetime = datetime.fromtimestamp(data["timestamp"]) return last_updated_datetime, exchange_rate * amount def convert_currency_fixerapi(src, dst, amount): """converts `amount` from the `src` currency to `dst`, requires upgraded account""" url = f"https://data.fixer.io/api/convert?access_key={API_KEY}&from={src}&to={dst}&amount={amount}" data = requests.get(url).json() if data["success"]: # request successful # get the latest datetime last_updated_datetime = datetime.fromtimestamp(data["info"]["timestamp"]) # get the result based on the latest price result = data["result"] return last_updated_datetime, result if __name__ == "__main__": import sys source_currency = sys.argv[1] destination_currency = sys.argv[2] amount = float(sys.argv[3]) # free account last_updated_datetime, exchange_rate = convert_currency_fixerapi_free(source_currency, destination_currency, amount) # upgraded account, uncomment if you have one # last_updated_datetime, exchange_rate = convert_currency_fixerapi(source_currency, destination_currency, amount) print("Last updated datetime:", last_updated_datetime) print(f"{amount} {source_currency} = {exchange_rate} {destination_currency}")

currency_converter_currencyapi.py

import requests import urllib.parse as p API_KEY = "<YOUR_API_KEY>" base_url = "https://api.currencyapi.com/v3/" # utility function that both functions will use def get_currencyapi_data(endpoint, date=None, base_currency="USD", print_all=True): """Get the list of currency codes from the API""" # construct the url url = p.urljoin(base_url, f"{endpoint}?apikey={API_KEY}{'' if endpoint == 'latest' else f'&date={date}'}&base_currency={base_currency}") # make the request res = requests.get(url) # get the json data data = res.json() # print all the currency codes and their values c = 0 if print_all: for currency_code, currency_name in data.get("data").items(): print(f"{currency_code}: {currency_name.get('value')}") c += 1 print(f"Total: {c} currencies") if endpoint == "latest": # get the last updated date last_updated = data.get("meta").get("last_updated_at") print(f"Last updated: {last_updated}") return data def get_latest_rates(base_currency="USD", print_all=True): """Get the latest rates from the API""" return get_currencyapi_data(endpoint="latest", base_currency=base_currency, print_all=print_all) def get_historical_rates(base_currency="USD", print_all=True, date="2023-01-01"): """Get the historical rates from the Currency API `date` must be in the format of YYYY-MM-DD""" return get_currencyapi_data(endpoint="historical", base_currency=base_currency, date=date, print_all=print_all) if __name__ == "__main__": latest_rates = get_latest_rates() print(f"\n{'-'*50}\n") # get the historical rates for the date 2021-01-01 historical_rates = get_historical_rates(date="2021-01-01", print_all=False) # get EUR rate, for example eur_rate = historical_rates.get("data").get("EUR").get("value") print(f"EUR rate on 2021-01-01: {eur_rate}")