Python 2.7 Python字典与其他条目组合时不起作用

我正在尝试制作一个Python程序，该程序执行以下操作： 给出股票代码列表，在网站www.thestreet.com上列出与每个代码相关联的链接列表，以查找其分析师评级。然后，使用Mechanize导入搜索在网页上对买入、持有或卖出进行评级。返回一本带有键ticker和条目buy、sell或hold的字典

当我一次输入一个股票代码时，代码运行良好，例如Streetdict['AAP']按预期返回['AAP'，'Buy！']。但是，当与其他标记器分组时，它会提供错误！正如我所定义的那样

代码如下：

import mechanize
br = mechanize.Browser()
br.set_handle_robots(False) #ignore
br.addheaders = [("User-agent","Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.2.13) Gecko/20101206 Ubuntu/10.10 (maverick) Firefox/3.6.13")]


auto_list = ['AAL','AAP','AN','AZO','BMWYY','BP','CCL','CHH','COP',
             'CVX','DAL','ETP','EXPE','F','FCAU','GM','GPI','GRMN','GT','H','HGV',
             'HLT','HMC','HOG','IHG','ISCA','JBLU','KMX','LAD','LUV','MAR','MGM',
             'NSANY','PBF','PCLN','PII','PK','PSX','RACE','RCL','RYAAY',
             'SHLD','SNI','SZKMY','TM','TRIP','TSLA','TTM','UAL',
             'VAC','VLKAY','VLVLY','WGO','WYN','XOM'] #auto list from stockpile

#bad: BRK/B, 'RDS/A'

#print(auto_list)

link = 'http://www.thestreet.com/quote/???.html' #"The Street" Analyst

def linker(list): #this creates a list of links from the provided tickers
    link_list = []

    for i in list:
        new_l = link.replace('???', i)
        link_list.append(new_l)
    return link_list


#defining the ratings
A = '>(Buy)'
C = '>(Hold)'
F = '>(Sell)'

def TheStreetchecker(list): #this checks the buy or sell rating on the website, "The Street" specifically


    BorS = []
    for i in list:
        br.open(i)
        if A in br.response().read():
            BorS.append("Buy!")
        if C in br.response().read():
            BorS.append("Hold!")
        if F in br.response().read():
            BorS.append("Sell!")

        else:
            BorS.append("Error!")
    return BorS

def Streetdict(list):
    D1 = zip(list, TheStreetchecker(linker(auto_list)))
    print D1
L0 = ['AZO']
Streetdict(L0)

以下是我在不同列表上运行Streetdict后得到的一些回报：

[('AAL', 'Buy!'), ('AAP', 'Error!'), ('AN', 'Buy!'), ('AZO', 'Error!'), ('BMWYY', 'Hold!'), ('BP', 'Error!'), ('CCL', 'Sell!'), ('CHH', 'Error!'), ('COP', 'Hold!'), ('CVX', 'Error!'), ('DAL', 'Buy!'), ('ETP', 'Error!'), ('EXPE', 'Hold!'), ('F', 'Error!'), ('FCAU', 'Hold!'), ('GM', 'Error!'), ('GPI', 'Hold!'), ('GRMN', 'Error!'), ('GT', 'Buy!'), ('H', 'Error!'), ('HGV', 'Hold!'), ('HLT', 'Error!'), ('HMC', 'Buy!'), ('HOG', 'Error!'), ('IHG', 'Hold!'), ('ISCA', 'Error!'), ('JBLU', 'Buy!'), ('KMX', 'Error!'), ('LAD', 'Buy!'), ('LUV', 'Error!'), ('MAR', 'Buy!'), ('MGM', 'Error!'), ('NSANY', 'Buy!'), ('PBF', 'Error!'), ('PCLN', 'Buy!'), ('PII', 'Error!'), ('PK', 'Buy!'), ('PSX', 'Error!'), ('RACE', 'Error!'), ('RCL', 'Buy!'), ('RYAAY', 'Error!'), ('SHLD', 'Buy!'), ('SNI', 'Error!'), ('SZKMY', 'Buy!'), ('TM', 'Error!'), ('TRIP', 'Error!'), ('TSLA', 'Buy!'), ('TTM', 'Error!'), ('UAL', 'Buy!'), ('VAC', 'Error!'), ('VLKAY', 'Buy!'), ('VLVLY', 'Error!'), ('WGO', 'Buy!'), ('WYN', 'Error!'), ('XOM', 'Buy!')]
>>> 
================== RESTART: /home/jadamczk/stock_chooser.py ==================
[('AAP', 'Buy!')]
>>> 
================== RESTART: /home/jadamczk/stock_chooser.py ==================
[('AAP', 'Buy!'), ('AZO', 'Error!')]
>>> 
================== RESTART: /home/jadamczk/stock_chooser.py ==================
[('AZO', 'Buy!')]

在上面代码块的最后两个字典返回中，错误应该很明显

我正在使用Python2.7.12，将最新版本机械化，并在LinuxFedora24上运行这一切

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如果您想了解其他信息，请询问

问题出在streetchecker函数的if语句中：

for i in list:
    br.open(i)
    if A in br.response().read(): # When this is true
        BorS.append("Buy!") # append with 'Buy' (1st append)
    if C in br.response().read(): # then check again if this is true which is not
        BorS.append("Hold!")

    # here is the problem
    if F in br.response().read(): # then check again if this is true which is not
        BorS.append("Sell!")
    else: # if F is not in br.response().read() which is true
        BorS.append("Error!") # append again with Error (2nd append)

对于每个循环，当A或C在br.response.read中时，列表将被追加两次，一次加上“买入”或“持有”，另一次加上“错误”。要更正此错误，请使用elif：

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就是这样，我希望它是清楚的。

我刚刚注意到字典中每隔一个键都会返回错误！我相信这与整个问题有关。非常感谢！所以else语句总是只链接到它前面的if语句？这帮了大忙，谢谢。

for i in list:
    br.open(i)
    if A in br.response().read():
        BorS.append("Buy!")
    elif C in br.response().read():
        BorS.append("Hold!")
    elif F in br.response().read():
        BorS.append("Sell!")

    else:
        BorS.append("Error!")