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Commit1e755d2

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add currency converter tutorial
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‎README.md

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@@ -115,6 +115,7 @@ This is a repository of all the tutorials of [The Python Code](https://www.thepy
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-[How to Extract YouTube Comments in Python](https://www.thepythoncode.com/article/extract-youtube-comments-in-python). ([code](web-scraping/youtube-comments-extractor))
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-[Automated Browser Testing with Edge and Selenium in Python](https://www.thepythoncode.com/article/automated-browser-testing-with-edge-and-selenium-in-python). ([code](web-scraping/selenium-edge-browser))
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-[How to Automate Login using Selenium in Python](https://www.thepythoncode.com/article/automate-login-to-websites-using-selenium-in-python). ([code](web-scraping/automate-login))
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-[How to Make a Currency Converter in Python](https://www.thepythoncode.com/article/make-a-currency-converter-in-python). ([code](web-scraping/currency-converter))
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-###[Python Standard Library](https://www.thepythoncode.com/topic/python-standard-library)
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-[How to Transfer Files in the Network using Sockets in Python](https://www.thepythoncode.com/article/send-receive-files-using-sockets-python). ([code](general/transfer-files/))
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#[How to Make a Currency Converter in Python](https://www.thepythoncode.com/article/make-a-currency-converter-in-python)
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To run the scripts:
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-`pip3 install -r requirements.txt`
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- Here is an example: To convert 1000 EUR to USD by scraping Yahoo Finance:
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```
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$ python currency_converter_yahoofin.py EUR USD 1000
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```
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Output:
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```
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Last updated datetime: 2022-02-02 12:37:39
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1000.0 EUR = 1132.6310634613037 USD
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```
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importrequests
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fromdateutil.parserimportparse
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defget_all_exchange_rates_erapi(src):
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url=f"https://open.er-api.com/v6/latest/{src}"
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# request the open ExchangeRate API and convert to Python dict using .json()
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data=requests.get(url).json()
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ifdata["result"]=="success":
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# request successful
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# get the last updated datetime
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last_updated_datetime=parse(data["time_last_update_utc"])
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# get the exchange rates
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exchange_rates=data["rates"]
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returnlast_updated_datetime,exchange_rates
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defconvert_currency_erapi(src,dst,amount):
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# get all the exchange rates
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last_updated_datetime,exchange_rates=get_all_exchange_rates_erapi(src)
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# convert by simply getting the target currency exchange rate and multiply by the amount
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returnlast_updated_datetime,exchange_rates[dst]*amount
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if__name__=="__main__":
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importsys
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source_currency=sys.argv[1]
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destination_currency=sys.argv[2]
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amount=float(sys.argv[3])
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last_updated_datetime,exchange_rate=convert_currency_erapi(source_currency,destination_currency,amount)
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print("Last updated datetime:",last_updated_datetime)
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print(f"{amount}{source_currency} ={exchange_rate}{destination_currency}")
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importrequests
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fromdatetimeimportdate,datetime
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API_KEY="8c3dce10dc5fdb6ec1f555a1504b1373"
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# API_KEY = "<YOUR_API_KEY_HERE>"
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defconvert_currency_fixerapi_free(src,dst,amount):
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"""converts `amount` from the `src` currency to `dst` using the free account"""
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url=f"http://data.fixer.io/api/latest?access_key={API_KEY}&symbols={src},{dst}&format=1"
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data=requests.get(url).json()
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ifdata["success"]:
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# request successful
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rates=data["rates"]
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# since we have the rate for our currency to src and dst, we can get exchange rate between both
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# using below calculation
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exchange_rate=1/rates[src]*rates[dst]
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last_updated_datetime=datetime.fromtimestamp(data["timestamp"])
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returnlast_updated_datetime,exchange_rate*amount
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defconvert_currency_fixerapi(src,dst,amount):
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"""converts `amount` from the `src` currency to `dst`, requires upgraded account"""
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url=f"https://data.fixer.io/api/convert?access_key={API_KEY}&from={src}&to={dst}&amount={amount}"
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data=requests.get(url).json()
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ifdata["success"]:
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# request successful
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# get the latest datetime
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last_updated_datetime=datetime.fromtimestamp(data["info"]["timestamp"])
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# get the result based on the latest price
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result=data["result"]
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returnlast_updated_datetime,result
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if__name__=="__main__":
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importsys
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source_currency=sys.argv[1]
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destination_currency=sys.argv[2]
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amount=float(sys.argv[3])
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# free account
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last_updated_datetime,exchange_rate=convert_currency_fixerapi_free(source_currency,destination_currency,amount)
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# upgraded account, uncomment if you have one
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# last_updated_datetime, exchange_rate = convert_currency_fixerapi(source_currency, destination_currency, amount)
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print("Last updated datetime:",last_updated_datetime)
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print(f"{amount}{source_currency} ={exchange_rate}{destination_currency}")
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importrequests
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frombs4importBeautifulSoupasbs
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importre
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fromdateutil.parserimportparse
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defconvert_currency_xe(src,dst,amount):
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defget_digits(text):
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"""Returns the digits and dots only from an input `text` as a float
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Args:
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text (str): Target text to parse
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"""
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new_text=""
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forcintext:
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ifc.isdigit()orc==".":
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new_text+=c
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returnfloat(new_text)
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url=f"https://www.xe.com/currencyconverter/convert/?Amount={amount}&From={src}&To={dst}"
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content=requests.get(url).content
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soup=bs(content,"html.parser")
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exchange_rate_html=soup.find_all("p")[2]
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# get the last updated datetime
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last_updated_datetime=parse(re.search(r"Last updated (.+)",exchange_rate_html.parent.parent.find_all("div")[-2].text).group()[12:])
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returnlast_updated_datetime,get_digits(exchange_rate_html.text)
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if__name__=="__main__":
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importsys
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source_currency=sys.argv[1]
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destination_currency=sys.argv[2]
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amount=float(sys.argv[3])
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last_updated_datetime,exchange_rate=convert_currency_xe(source_currency,destination_currency,amount)
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print("Last updated datetime:",last_updated_datetime)
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print(f"{amount}{source_currency} ={exchange_rate}{destination_currency}")
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importrequests
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frombs4importBeautifulSoupasbs
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fromdateutil.parserimportparse
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frompprintimportpprint
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defget_exchange_list_xrates(currency,amount=1):
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# make the request to x-rates.com to get current exchange rates for common currencies
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content=requests.get(f"https://www.x-rates.com/table/?from={currency}&amount={amount}").content
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# initialize beautifulsoup
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soup=bs(content,"html.parser")
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# get the last updated time
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price_datetime=parse(soup.find_all("span",attrs={"class":"ratesTimestamp"})[1].text)
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# get the exchange rates tables
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exchange_tables=soup.find_all("table")
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exchange_rates= {}
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forexchange_tableinexchange_tables:
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fortrinexchange_table.find_all("tr"):
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# for each row in the table
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tds=tr.find_all("td")
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iftds:
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currency=tds[0].text
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# get the exchange rate
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exchange_rate=float(tds[1].text)
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exchange_rates[currency]=exchange_rate
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returnprice_datetime,exchange_rates
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if__name__=="__main__":
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importsys
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source_currency=sys.argv[1]
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amount=float(sys.argv[2])
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price_datetime,exchange_rates=get_exchange_list_xrates(source_currency,amount)
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print("Last updated:",price_datetime)
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pprint(exchange_rates)
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importyahoo_fin.stock_infoassi
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fromdatetimeimportdatetime,timedelta
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defconvert_currency_yahoofin(src,dst,amount):
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# construct the currency pair symbol
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symbol=f"{src}{dst}=X"
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# extract minute data of the recent 2 days
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latest_data=si.get_data(symbol,interval="1m",start_date=datetime.now()-timedelta(days=2))
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# get the latest datetime
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last_updated_datetime=latest_data.index[-1].to_pydatetime()
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# get the latest price
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latest_price=latest_data.iloc[-1].close
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# return the latest datetime with the converted amount
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returnlast_updated_datetime,latest_price*amount
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if__name__=="__main__":
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importsys
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source_currency=sys.argv[1]
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destination_currency=sys.argv[2]
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amount=float(sys.argv[3])
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last_updated_datetime,exchange_rate=convert_currency_yahoofin(source_currency,destination_currency,amount)
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print("Last updated datetime:",last_updated_datetime)
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print(f"{amount}{source_currency} ={exchange_rate}{destination_currency}")
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python-dateutil
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requests
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bs4
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yahoo_fin

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