python人民幣與美元幣值轉(zhuǎn)換代碼 Python人民幣美元轉(zhuǎn)換代碼
在開(kāi)始編寫(xiě)代碼之前,我們需要安裝第三方庫(kù)requests和BeautifulSoup來(lái)獲取實(shí)時(shí)匯率數(shù)據(jù)。可以使用pip命令來(lái)安裝這兩個(gè)庫(kù):```pip install requestspip inst
在開(kāi)始編寫(xiě)代碼之前,我們需要安裝第三方庫(kù)requests和BeautifulSoup來(lái)獲取實(shí)時(shí)匯率數(shù)據(jù)??梢允褂胮ip命令來(lái)安裝這兩個(gè)庫(kù):
```
pip install requests
pip install BeautifulSoup4
```
接下來(lái),我們將使用requests庫(kù)來(lái)獲取匯率數(shù)據(jù),并使用BeautifulSoup庫(kù)來(lái)解析HTML頁(yè)面。以下是編寫(xiě)代碼的步驟:
1. 導(dǎo)入所需的庫(kù):
```python
import requests
from bs4 import BeautifulSoup
```
2. 獲取匯率數(shù)據(jù)并解析:
```python
url ""
response (url)
soup BeautifulSoup(response.text, "")
table ("table")
rows _all("tr")
```
3. 提取所需的匯率信息:
```python
exchange_rate {}
for row in rows[1:]:
data _all("td")
currency data[0]()
rate float(data[5].text)
exchange_rate[currency] rate
```
4. 編寫(xiě)轉(zhuǎn)換函數(shù):
```python
def convert_currency(amount, from_currency, to_currency):
if from_currency "人民幣":
rate exchange_rate[to_currency]
converted_amount amount / rate
elif to_currency "人民幣":
rate exchange_rate[from_currency]
converted_amount amount * rate
else:
rate1 exchange_rate[from_currency]
rate2 exchange_rate[to_currency]
converted_amount (amount * rate2) / rate1
return converted_amount
```
5. 編寫(xiě)用戶界面:
```python
def main():
print("歡迎使用人民幣與美元幣值轉(zhuǎn)換程序!")
while True:
amount float(input("請(qǐng)輸入金額:"))
from_currency input("請(qǐng)輸入原幣種(人民幣/美元):")
to_currency input("請(qǐng)輸入目標(biāo)幣種(人民幣/美元):")
converted_amount convert_currency(amount, from_currency, to_currency)
print(f"轉(zhuǎn)換結(jié)果為:{converted_amount} {to_currency}")
choice input("是否繼續(xù)轉(zhuǎn)換?(是/否)")
if choice.lower() ! "是":
break
if __name__ "__main__":
main()
```
通過(guò)上述代碼,我們可以實(shí)現(xiàn)一個(gè)簡(jiǎn)單的人民幣與美元幣值轉(zhuǎn)換程序。用戶只需要輸入金額、原幣種和目標(biāo)幣種,程序?qū)⒆詣?dòng)計(jì)算并輸出轉(zhuǎn)換結(jié)果。
總結(jié):
本文通過(guò)詳細(xì)介紹了使用Python編寫(xiě)人民幣與美元幣值轉(zhuǎn)換的代碼。從獲取匯率數(shù)據(jù)到編寫(xiě)轉(zhuǎn)換函數(shù)再到設(shè)計(jì)用戶界面,步驟清晰,易于理解。讀者可以根據(jù)本文提供的代碼示例來(lái)實(shí)現(xiàn)自己的匯率轉(zhuǎn)換程序,并根據(jù)需要進(jìn)行擴(kuò)展和優(yōu)化。