Question

运行以下代码后，您可以在＆＃39; index＆＃39;

中获取五个索引的列表

import tkinter as tk
OPTIONS = [ "^AEX","^AXJO","^BFX","^BSESN","^MERV","^DJR","^PUT","^OMXC20","^DJA","^DJI","^DJICA","^DJT","^DJU","^DWCF"]
root = tk.Tk()
tk.Label(root, text='OptionMenus', bg='#aaa').pack(fill='x')
index = []
def on_button():
    index.clear()
    for i,var in enumerate(o_vars):
        index.append('{}'.format(var.get()))
        index.__str__()
        print('Selected Index {}: {}'.format(i+1, var.get()))
    print()
o_vars = []
for i in range(5):
    var = tk.StringVar(value='- select -')
    o_vars.append(var)
    o = tk.OptionMenu(root, var, *OPTIONS)
    o.pack()
b = tk.Button(root, text='OK', command=on_button)
b.pack(fill='x')
root.mainloop()

根据您的选择，它看起来像：

index

Out: ['^BSESN', '^DJI', '^HSI', '^JKII', '^KS11']

现在我必须将此字符串输入到下面代码末尾的另一行代码中，查找部分索引[0]，索引[1] ...索引[4]

这没有发生。我的猜测是必须由于需要双引号。任何关于如何实现它的想法。尝试替换和所有。

import pandas as pd
import urllib
import datetime
import requests
import pylab
x =[]
yql_bs_query = []
yql_bs_url = []
data=[]
quote_new =[]
baseurl = "https://query.yahooapis.com/v1/public/yql?"
from datetime import date
import numpy as np
start_date = date(2007, 1, 1)
end_date = datetime.date.today()
delta = datetime.timedelta(np.timedelta64(end_date - start_date,'D').astype(int) /20)
while start_date <= end_date:
    x.append(start_date.strftime("%Y-%m-%d"))
    start_date += delta
for i in range(0,20):
    x[i] = str.format((pd.to_datetime(x[i]) + datetime.timedelta(days=1)).strftime("'%Y-%m-%d'"))
    yql_bs_query.append(('select * from yahoo.finance.historicaldata where symbol in (index[0],index[1],index[2],index[3],index[4]) and startDate = ' +x[i]+' and endDate = ' +pd.to_datetime(x[i+1]).strftime("'%Y-%m-%d'") ))`

Answer 1

'select * from yahoo.finance.historicaldata where symbol in (index[0],index[1],index[2],index[3],index[4]) and startDate = '

实际上没有替换索引值，因为它只是将其视为文字字符串，而是需要至少对它们应用一些字符串格式化。

'select * from yahoo.finance.historicaldata where symbol in ({}, {}, {}, {}, {}) and startDate = '.format(index[0],index[1],index[2],index[3],index[4])

哪个应该至少让你更接近正确的sql字符串。

尽管如此，您应该确保使用parameterized queries来避免bobby tables

将单引号字符串转换为双引号字符串

1 个答案: