Python 列表索引给出错误的值？

输出：

import stockquotes
 

symbol_name = ['SPY', 'XOM', 'GLD']
for x in symbol_name:
    ticker = stockquotes.Stock(x)
    today_price = ticker.current_price
    print(x, 'Quote: ',today_price)
    

print(symbol_name[1], today_price)

import stockquotes
 

symbol_name = ['SPY', 'XOM', 'GLD']
data = {}
for x in symbol_name:
    ticker = stockquotes.Stock(x)
    today_price = ticker.current_price
    data[x] = today_price

print(data['XOM'])

但当我试图通过列表的索引获取XOM的报价时，我得到的是GLD的报价

SPY Quote:  337.13
XOM Quote:  41.96
GLD Quote:  182.24

输出：

import stockquotes
 

symbol_name = ['SPY', 'XOM', 'GLD']
for x in symbol_name:
    ticker = stockquotes.Stock(x)
    today_price = ticker.current_price
    print(x, 'Quote: ',today_price)
    

print(symbol_name[1], today_price)

import stockquotes
 

symbol_name = ['SPY', 'XOM', 'GLD']
data = {}
for x in symbol_name:
    ticker = stockquotes.Stock(x)
    today_price = ticker.current_price
    data[x] = today_price

print(data['XOM'])

---

关于如何手动访问每个报价有什么想法吗？

将价格保存在字典中。然后通过

符号名

访问

XOM 182.24

输出：

import stockquotes
 

symbol_name = ['SPY', 'XOM', 'GLD']
for x in symbol_name:
    ticker = stockquotes.Stock(x)
    today_price = ticker.current_price
    print(x, 'Quote: ',today_price)
    

print(symbol_name[1], today_price)

import stockquotes
 

symbol_name = ['SPY', 'XOM', 'GLD']
data = {}
for x in symbol_name:
    ticker = stockquotes.Stock(x)
    today_price = ticker.current_price
    data[x] = today_price

print(data['XOM'])

---

每次通过循环，您都会覆盖

今天的\u price

。循环完成后，它有最后一个价格。

今天\u价格不是一个列表，您没有索引它。您了解变量是如何工作的吗？为什么你认为今天的
价格
的值会根据你正在打印的
符号
的索引而变化？制作一个将股票代码映射到价格的字典。字典！明白了，谢谢