Question

我正在尝试将以下列表值输入到下面的url字符串中。当我执行以下操作时：

tickers = ['AAPL','YHOO','TSLA','NVDA']
url = 'http://www.zacks.com/stock/quote/{}'.format(tickers)`

Python返回

http://www.zacks.com/stock/quote/['AAPL', 'YHOO', 'TSLA', 'NVDA']`

我希望它做的是迭代列表并返回以下内容：

http://www.zacks.com/stock/quote/AAPL
http://www.zacks.com/stock/quote/YHOO
http://www.zacks.com/stock/quote/TSLA
http://www.zacks.com/stock/quote/NVDA

谢谢。

Answer 1

map的一个漂亮技巧：

url = 'http://www.zacks.com/stock/quote/{}'
tickers = ['AAPL','YHOO','TSLA','NVDA']

list(map(url.format, tickers))

['http://www.zacks.com/stock/quote/AAPL',
 'http://www.zacks.com/stock/quote/YHOO',
 'http://www.zacks.com/stock/quote/TSLA',
 'http://www.zacks.com/stock/quote/NVDA']

Answer 2

使用此：

tickers = ['AAPL','YHOO','TSLA','NVDA']
url = 'http://www.zacks.com/stock/quote/'
['{}{}'.format(url, x) for x in tickers]

结果是：

['http://www.zacks.com/stock/quote/AAPL',
 'http://www.zacks.com/stock/quote/YHOO',
 'http://www.zacks.com/stock/quote/TSLA',
 'http://www.zacks.com/stock/quote/NVDA']

Answer 3

使用循环遍历tickers，并将字符串连接在一起：

tickers = ['AAPL','YHOO','TSLA','NVDA']
url = 'http://www.zacks.com/stock/quote/'

for ticker in tickers:
   print(url + ticker)

# http://www.zacks.com/stock/quote/AAPL
# http://www.zacks.com/stock/quote/YHOO
# http://www.zacks.com/stock/quote/TSLA
# http://www.zacks.com/stock/quote/NVDA

或者列表理解：

[url + ticker for ticker in tickers]

这给出了列表中的组合字符串：

['http://www.zacks.com/stock/quote/AAPL', 
 'http://www.zacks.com/stock/quote/YHOO', 
 'http://www.zacks.com/stock/quote/TSLA', 
 'http://www.zacks.com/stock/quote/NVDA']

Answer 4

在传递列表之前，您需要先加入列表。如果您尝试将一个包含所有参数的网址添加到网址中，请先执行此操作：

params = "".join(tickers)
url = 'http://www.zacks.com/stock/quote/{}'.format(params)

如果您想要多个网址，每次都有一个参数：

urls = []
for param in tickers:
    urls.append('http://www.zacks.com/stock/quote/{}'.format(param))

Answer 5

你可以试试这个：

tickers = ['AAPL','YHOO','TSLA','NVDA']
url = 'http://www.zacks.com/stock/quote/'
for e in tickers:
    print(url + e)

这将打印网址，而不是将它们添加到列表中。

Answer 6

试试这个： -

tickers = ['AAPL','YHOO','TSLA','NVDA']
url = 'http://www.zacks.com/stock/quote/'
new_ls = (x+y for x,y in zip([url]*len(tickers),tickers))
for new_url in new_ls:
    print(new_url)

如何将列表中的值输入字符串？

6 个答案: