如何避免除零誤差時，對分析的XML數據執行計算

Question

請與你的答案友好我已經編寫了10天。我在代碼中執行循環時遇到了問題，但我相當肯定這是因爲我得到了一個回溯。

我解析從URL獲得一個XML文件，使用下面的代碼：

pattern4 = re.compile('title=\'Naps posted: (.*) Winners:') 
pattern5 = re.compile('Winners: (.*)\'><img src=') 

for row in xmlload1['rows']: 
    cell = row["cell"] 

##### defining the Keys (key is the area from which data is pulled in the XML) for use in the pattern finding/regex 
    user_delimiter = cell['username'] 
    selection_delimiter = cell['race_horse'] 

##### the use of the float here is to make sure the result of the strike rate calculations returns as a decimal, otherwise python 2 rounds to the nearest integer! 
    user_numberofselections = float(re.findall(pattern4, user_delimiter)[0]) 
    user_numberofwinners = float(re.findall(pattern5, user_delimiter)[0]) 

    strikeratecalc1 = user_numberofwinners/user_numberofselections 
    strikeratecalc2 = strikeratecalc1*100 

##### Printing the results of the code at hand 

    print "number of selections = ",user_numberofselections 
    print "number of winners = ",user_numberofwinners 
    print "Strike rate = ",strikeratecalc2,"%" 
    print "" 

getData() 

此代碼與代碼返回的休息：

number of selections = 112.0 
number of winners = 21.0 
Strike rate = 18.75 % 

number of selections = 146.0 
number of winners = 21.0 
Strike rate = 14.3835616438 % 

number of selections = 163.0 
number of winners = 55.0 
Strike rate = 33.7423312883 % 

現在這個xmlload的結果提示只有三個用戶可以解析，但是有第四個數據會讀取

number of selections = 0 
number of winners = 0 
Strike rate = 0 

對於我的目的來說，沒有必要爲沒有記錄的用戶提供用戶統計信息，我如何使用0選擇跳過用戶，或者至少使用0來分隔錯誤並不影響代碼在循環中運行？

親切的問候！

Answer 1

只需使用一個continue當你發現一個0

user_numberofwinners = float(re.findall(pattern5, user_delimiter)[0]) 

# if the number of winners is 0, go to the next row to avoid division by 0 
if user_numberofwinners == 0.0 : continue;