Python 如何将值列表迭代为字符串?
我是Python新手,请原谅我的理解力不足 我可以使用BeatifulSoup4下载Python 如何将值列表迭代为字符串?,python,string,python-3.x,list,iteration,Python,String,Python 3.x,List,Iteration,我是Python新手,请原谅我的理解力不足 我可以使用BeatifulSoup4下载aapl的数据,将数据分配给特定变量,并使用变量创建字典。不过,我想做的是通过网站链接迭代股票列表,并为列表中的不同公司多次运行相同的代码,最后为每个公司生成一个字典 import bs4 as bs import urllib.request stocks = ['aapl', 'nvda', 'amgn'] sauce = urllib.request.urlopen('https://www.zack
aapl
的数据,将数据分配给特定变量,并使用变量创建字典。不过,我想做的是通过网站链接迭代股票
列表,并为列表中的不同公司多次运行相同的代码,最后为每个公司生成一个字典
import bs4 as bs
import urllib.request
stocks = ['aapl', 'nvda', 'amgn']
sauce = urllib.request.urlopen('https://www.zacks.com/stock/quote/aapl/balance-sheet')
soup = bs.BeautifulSoup(sauce,'lxml')
#Cash & Cash Equivalents
cash_and_equivalents2017 = soup.find_all('td')[33].string
cash_and_equivalents2017 = int(cash_and_equivalents2017.replace(',',''))
cash_and_equivalents2016 = soup.find_all('td')[34].string
cash_and_equivalents2016 = int(cash_and_equivalents2016.replace(',',''))
#Receivables
receivables2017 = soup.find_all('td')[40].string
receivables2017 = int(receivables2017.replace(',',''))
receivables2016 = soup.find_all('td')[41].string
receivables2016 = int(receivables2016.replace(',',''))
aapl = {'Cash & Cash Equivalents':
{'2017': cash_and_equivalents2017,
'2016': cash_and_equivalents2016},
'Receivables':
{'2017': receivables2017,
'2016': receivables2016}
}
print(aapl)
它为aapl
输出以下内容:
{'Cash & Cash Equivalents': {'2017': 74181, '2016': 67155}, 'Receivables': {'2017': 29299, '2016': 30343}}
以上是原始代码,我想用sauce
中的aapl
替换stocks
中的其他字符串值,以最终获得如下所示的多个词典,这样我就可以通过在库存
列表
sauce = urllib.request.urlopen('https://www.zacks.com/stock/quote/[stocks]/balance-sheet')
[stocks] = {'Cash & Cash Equivalents':
{'2017': cash_and_equivalents2017,
'2016': cash_and_equivalents2016},
'Receivables':
{'2017': receivables2017,
'2016': receivables2016}
并且输出应该是3个字典,名称为aapl
,nvda
,amgn
aapl = {'Cash & Cash Equivalents':
{'2017': cash_and_equivalents2017,
'2016': cash_and_equivalents2016},
'Receivables':
{'2017': receivables2017,
'2016': receivables2016}
nvda = {'Cash & Cash Equivalents':
{'2017': cash_and_equivalents2017,
'2016': cash_and_equivalents2016},
'Receivables':
{'2017': receivables2017,
'2016': receivables2016}
amgn = {'Cash & Cash Equivalents':
{'2017': cash_and_equivalents2017,
'2016': cash_and_equivalents2016},
'Receivables':
{'2017': receivables2017,
'2016': receivables2016}
感谢您的时间和帮助,非常感谢。我不确定是否正确理解了您的问题 您想对
股票=['aapl'、'nvda'、'amgn']
中的每个条目进行一次请求和处理吗
如果是这样,在Python中,可以使用for循环对列表或dict进行迭代,如下所示:
for stock in stocks:
# Do your processing here
在您的情况下,您可以执行以下操作:
{
'aapl':
{
'Cash & Cash Equivalents':
{
'2017': 'some value',
'2016': 'some value'
},
'Receivables':
{
'2017': 'some value',
'2016': 'some value'
}
},
'nvda':
{
'Cash & Cash Equivalents':
{
'2017': 'some value',
'2016': 'some value'
},
'Receivables':
{
'2017': 'some value',
'2016': 'some value'
}
},
'amgn':
{
'Cash & Cash Equivalents':
{
'2017': 'some value',
'2016': 'some value'
},
'Receivables':
{
'2017': 'some value',
'2016': 'some value'
}
}
}
使用dict而不是列表,并将处理后的数据存储在其中
stocks = {'aapl': {}, 'nvda': {}, 'amgn': {}}
for stock in stocks:
sauce = urllib.request.urlopen(
f'https://www.zacks.com/stock/quote/{stock}/balance-sheet')
soup = bs.BeautifulSoup(sauce, 'lxml')
# Cash & Cash Equivalents
cash_and_equivalents2017 = soup.find_all('td')[33].string
cash_and_equivalents2017 = int(cash_and_equivalents2017.replace(',', ''))
cash_and_equivalents2016 = soup.find_all('td')[34].string
cash_and_equivalents2016 = int(cash_and_equivalents2016.replace(',', ''))
# Receivables
receivables2017 = soup.find_all('td')[40].string
receivables2017 = int(receivables2017.replace(',', ''))
receivables2016 = soup.find_all('td')[41].string
receivables2016 = int(receivables2016.replace(',', ''))
stocks[stock] = {'Cash & Cash Equivalents':
{'2017': cash_and_equivalents2017,
'2016': cash_and_equivalents2016},
'Receivables':
{'2017': receivables2017,
'2016': receivables2016}
}
print(stocks)
至于url字符串,我使用了
将输出以下内容:
{
'aapl':
{
'Cash & Cash Equivalents':
{
'2017': 'some value',
'2016': 'some value'
},
'Receivables':
{
'2017': 'some value',
'2016': 'some value'
}
},
'nvda':
{
'Cash & Cash Equivalents':
{
'2017': 'some value',
'2016': 'some value'
},
'Receivables':
{
'2017': 'some value',
'2016': 'some value'
}
},
'amgn':
{
'Cash & Cash Equivalents':
{
'2017': 'some value',
'2016': 'some value'
},
'Receivables':
{
'2017': 'some value',
'2016': 'some value'
}
}
}
祝您度过愉快的一天。将每个响应添加到一个列表中,如下图所示,并从DictionAnry中返回值:
aapl, nvda, amgn = [{'Cash & Cash Equivalents': {'2017': 74181, '2016': 67155}, 'Receivables': {'2017': 29299, '2016': 30343}},{'Cash & Cash Equivalents': {'2017': 74181, '2016': 67155}, 'Receivables': {'2017': 29299, '2016': 30343}},{'Cash & Cash Equivalents': {'2017': 74181, '2016': 67155}, 'Receivables': {'2017': 29299, '2016': 30343}}]
您必须循环使用股票中的每个值以获得所需的结果。