Question

我想计算'totalStock'，但由于p ['stockValue']不是整数，因此出现typeError。我试图使用int（）函数，但它也无法正常工作。

    def index():
    # Get user ID
    user_ID = session['user_id']

    # Query for symbol, name, shares and store in variable
    purchaseData = db.execute('SELECT symbol, name, shares FROM purchases WHERE id = :id', id=user_ID)

    #Store all info in userData
    userData = {}
    stockCount = 0
    for i in purchaseData:
        userData['symbol'] = i['symbol']
        userData['name'] = i['name']
        userData['shares'] = i['shares']
        userData['price'] = lookup(i['symbol'])
        # Calculate stock value
        userData['stockValue'] = lookup(i['symbol']) * i['shares']
        # Count rows
        stockCount += 1

    # Query for remaining cash
    userData['remainingCash'] = db.execute('SELECT cash FROM users WHERE id = :id', id=user_ID)

    # Calculate total value
    totalStock = 0
    for p in userData:
        totalStock = totalStock + int(p['stockValue'])

    userData['totalValue'] = userData['remainingCash'] + totalStock

    # Return render and send values
    return render_template('index.html', rows=stockCount, **userData)

purchaseData的结构是什么？

Answer 1

这具有CS50财务项目的所有显着特征。来自the spec：

lookup，[是]在给定symbol（例如NFLX）的情况下返回股票的函数用三个键的dict形式的公司报价：name，其值是str，即公司名称； price，其值为 float;和symbol，其值为str，是规范化的（大写）股票代号的版本，无论该代号如何传递到lookup
时大写

SQL查询在python中返回什么数据结构？

1 个答案: