app.py

import streamlit as st

# Title of the app
st.title("🌍 Currency Converter App")

# Static exchange rates (base currency: USD)
# Note: These rates are for demonstration purposes only and may not reflect real-world values.
exchange_rates = {
    "PKR": 279.50,  # Pakistani Rupee
    "USD": 1.0,     # US Dollar
    "CNY": 7.20,    # Chinese Yuan
    "INR": 83.00,   # Indian Rupee
    "RUB": 92.00,   # Russian Ruble
    "JPY": 149.00,  # Japanese Yen
    "EUR": 0.93,    # Euro (Germany, France, Italy, etc.)
    "GBP": 0.80,    # British Pound
    "BRL": 5.00,    # Brazilian Real
    "CAD": 1.35,    # Canadian Dollar
    "AUD": 1.55,    # Australian Dollar
    "KRW": 1300.00, # South Korean Won
    "MXN": 18.00,   # Mexican Peso
    "IDR": 15500.00,# Indonesian Rupiah
    "TRY": 30.00,   # Turkish Lira
    "SAR": 3.75,    # Saudi Riyal
    "CHF": 0.90,    # Swiss Franc
    "ARS": 800.00,  # Argentine Peso
    "ZAR": 19.00,   # South African Rand
    "EGP": 30.00,   # Egyptian Pound
    "THB": 36.00,   # Thai Baht
    "SEK": 10.50,   # Swedish Krona
    "NOK": 10.00,   # Norwegian Krone
    "PLN": 4.20,    # Polish Złoty
    "MYR": 4.70,    # Malaysian Ringgit
    "SGD": 1.35,    # Singapore Dollar
    "PHP": 56.00,   # Philippine Peso
    "VND": 24000.00,# Vietnamese Dong
    "DKK": 6.90,    # Danish Krone
    "IRR": 42000.00,# Iranian Rial
    "IQD": 1300.00, # Iraqi Dinar
    "ILS": 3.90,    # Israeli Shekel
    "AED": 3.67,    # UAE Dirham
    "NGN": 900.00,  # Nigerian Naira
    "KES": 150.00,  # Kenyan Shilling
    "COP": 4000.00, # Colombian Peso
    "CLP": 900.00,  # Chilean Peso
    "PEN": 3.80,    # Peruvian Sol
    "NZD": 1.65,    # New Zealand Dollar
    "BDT": 110.00,  # Bangladeshi Taka
    "LKR": 320.00,  # Sri Lankan Rupee
    "NPR": 130.00,  # Nepalese Rupee
    "AFN": 85.00,   # Afghan Afghani
    "QAR": 3.64,    # Qatari Riyal
}

# List of countries and their currency codes
country_currencies = {
    "Pakistan": "PKR",
    "United States": "USD",
    "China": "CNY",
    "India": "INR",
    "Russia": "RUB",
    "Japan": "JPY",
    "Germany": "EUR",
    "United Kingdom": "GBP",
    "France": "EUR",
    "Brazil": "BRL",
    "Canada": "CAD",
    "Australia": "AUD",
    "Italy": "EUR",
    "South Korea": "KRW",
    "Spain": "EUR",
    "Mexico": "MXN",
    "Indonesia": "IDR",
    "Turkey": "TRY",
    "Saudi Arabia": "SAR",
    "Switzerland": "CHF",
    "Netherlands": "EUR",
    "Argentina": "ARS",
    "South Africa": "ZAR",
    "Egypt": "EGP",
    "Thailand": "THB",
    "Sweden": "SEK",
    "Norway": "NOK",
    "Poland": "PLN",
    "Malaysia": "MYR",
    "Singapore": "SGD",
    "Philippines": "PHP",
    "Vietnam": "VND",
    "Greece": "EUR",
    "Portugal": "EUR",
    "Denmark": "DKK",
    "Iran": "IRR",
    "Iraq": "IQD",
    "Israel": "ILS",
    "UAE (United Arab Emirates)": "AED",
    "Nigeria": "NGN",
    "Kenya": "KES",
    "Colombia": "COP",
    "Chile": "CLP",
    "Peru": "PEN",
    "New Zealand": "NZD",
    "Bangladesh": "BDT",
    "Sri Lanka": "LKR",
    "Nepal": "NPR",
    "Afghanistan": "AFN",
    "Qatar": "QAR",
}

# Function to convert currency
def convert_currency(amount, from_currency, to_currency):
    if from_currency == to_currency:
        return amount
    # Convert to USD first, then to the target currency
    amount_in_usd = amount / exchange_rates[from_currency]
    converted_amount = amount_in_usd * exchange_rates[to_currency]
    return converted_amount

# Streamlit UI
st.write("### Select Currencies and Amount")

# Dropdown for selecting source and target currencies
from_currency = st.selectbox("From Currency", list(country_currencies.values()), key="from_currency")
to_currency = st.selectbox("To Currency", list(country_currencies.values()), key="to_currency")

# Input for amount
amount = st.number_input("Amount", min_value=0.01, value=1.00, step=0.01)

# Convert button
if st.button("Convert"):
    converted_amount = convert_currency(amount, from_currency, to_currency)
    st.success(f"**{amount} {from_currency} = {converted_amount:.2f} {to_currency}**")

# Footer
st.write("---")
st.write("**Note:** Exchange rates are static and for demonstration purposes only.")