在 Python 中迭代嵌套字典

我的字典的结构如下：

stockData = {
    'AAPL': {
        'beta': 1.01833975315094,
        'company_name': 'Apple',
        'dividend': 1.9341673320912078, 
        'total':300}, 
    'GOOG': {
        'beta': 1.01833975315094,
        'company_name': 'Apple',
        'dividend': 1.9341673320912078, 
        'total':300}
     }

这是我赋值的区域：

for row in range(2, sheet.max_row + 1):
    # Each row in the spreadsheet has data for one census tract.
    company_name  = sheet['A' + str(row)].value
    ticker = sheet['B' + str(row)].value
    sector = sheet['C' + str(row)].value
    shares = sheet['D' + str(row)].value
    price = sheet['E' + str(row)].value
    total = sheet['F' + str(row)].value
    beta = sheet['G' + str(row)].value
    dividend = sheet['H' + str(row)].value
    number_stocks+=1

    # Make sure the key for this ticker exists.
    stockData.setdefault(ticker,{})
    stockData[ticker]['company_name'] = company_name
    stockData[ticker]['sector'] = sector
    stockData[ticker]['shares'] = shares
    stockData[ticker]['price'] = price
    stockData[ticker]['total'] = total
    stockData[ticker]['dividend'] = dividend
    stockData[ticker]['beta'] = beta

我遇到一个问题，我使用 for 循环遍历字典来添加新值“百分比”，即“总计”除以所有股票的总和。

def get_portfolio_value(stocks,item):
    portValue = 0
    percentage = 0
    for k, v in stocks.items():
        portValue = portValue + v.get(item,0)
        stockData[ticker]['percentage'] = stockData[ticker]['total']/portValue
    print(portValue)

get_portfolio_value(stockData,'total')

问题是 get_portfolio_value 函数正在为我提供投资组合的整个 portValue 总计，但是我试图将投资组合的百分比添加到每只股票的行无法正常工作 - 奇怪的是，它只出现在其中一只股票。有人可以建议吗？

如果我正确理解你的问题，你可以尝试如下（我刚刚复制了stockData below):

stockData = {
    'AAPL': {
        'beta': 1.01833975315094,
        'company_name': 'Apple',
        'dividend': 1.9341673320912078, 'total': 300},
    'GOOG': {
        'beta': 1.01833975315094,
        'company_name': 'Apple',
        'dividend': 1.9341673320912078, 'total': 300}}

我想这就是你的意思：

def get_portfolio_value(stocks, item='total'):
     portValue = 0
     for v in stocks.values():
        portValue += v[item]
     for k in stocks.keys():
        stocks[k].update({'percentage': stocks[k]['total'] / portValue})
    print(portValue)

get_portfolio_value(stockData, 'total')