美元欧元转换器：实时汇率查询、图表分析

以下是一个简单的美元（USD）和欧元（EUR）转换器的实现，它包括实时汇率查询和图表分析的功能。由于无法使用外部库，我将使用Python内置的库来模拟这些功能。

```python

import random

from datetime import datetime

import matplotlib.pyplot as plt

模拟实时汇率API

def get_real_time_exchange_rate():

这里使用随机数来模拟实时汇率，实际应用中应从API获取

return round(random.uniform(0.9, 1.1), 4)

汇率转换

def convert_currency(amount, from_currency, to_currency):

if from_currency == 'USD' and to_currency == 'EUR':

return amount get_real_time_exchange_rate()

elif from_currency == 'EUR' and to_currency == 'USD':

return amount / get_real_time_exchange_rate()

else:

return "Unsupported currency conversion"

汇率图表分析

def plot_exchange_rate_chart(days):

dates = [datetime.now() timedelta(days=i) for i in range(days)]

rates = [get_real_time_exchange_rate() for _ in range(days)]

plt.figure(figsize=(10, 5))

plt.plot(dates, rates, marker='o')

plt.title('Real-time USD to EUR Exchange Rate')

plt.xlabel('Date')

plt.ylabel('Exchange Rate')

plt.grid(True)

plt.show()

主函数

def main():

print("Welcome to the USD to EUR Currency Converter")

amount = float(input("Enter the amount of USD you want to convert: "))

from_currency = input("Enter the currency you are converting from (USD/EUR): ")

to_currency = input("Enter the currency you want to convert to (USD/EUR): ")

converted_amount = convert_currency(amount, from_currency, to_currency)

print(f"The converted amount is: {converted_amount:.2f