請(qǐng)回答我，我已經(jīng)編碼了10天了。我在執(zhí)行代碼中的循環(huán)時(shí)遇到麻煩，但是我可以肯定的是，這是因?yàn)槲业玫搅嘶厮?。我使用以下代碼解析從url獲得的xml文件：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()此代碼與其余代碼一起返回：number of selections =  112.0number of winners =  21.0Strike rate =  18.75 %number of selections =  146.0number of winners =  21.0Strike rate =  14.3835616438 %number of selections =  163.0number of winners =  55.0Strike rate =  33.7423312883 %現(xiàn)在，此xmlload的結(jié)果表明，只有三個(gè)用戶要解析，但是有第4個(gè)whos數(shù)據(jù)會(huì)讀取number of selections =  0number of winners =  0Strike rate =  0出于我的目的，對(duì)于沒(méi)有跟蹤記錄的用戶，沒(méi)有必要拉入用戶統(tǒng)計(jì)信息，我該如何使代碼跳過(guò)選擇0的用戶，或者至少使其不被零除的錯(cuò)誤不會(huì)影響要在循環(huán)中運(yùn)行的代碼？