麻煩解析xml，無法獲取.find在Python中工作ElementTree

我想從XML文件中提取信息，但我掙扎。麻煩解析xml，無法獲取.find在Python中工作ElementTree

<players root="resources/gfx/characters/costumes/" portraitroot="resources/gfx/ui/boss/" bigportraitroot="resources/gfx/ui/stage/"> 
    <player id="0" name="Isaac" skin="Character_001_Isaac.png" hp="6" bombs="1" items="302,105" portrait="PlayerPortrait_01_Isaac.png" bigportrait="PlayerPortraitBig_01_Isaac.png" skinColor="-1" /> 
    <player id="1" name="Magdalene" skin="Character_002_Magdalene.png" costume="7" hp="8" items="302,45" portrait="PlayerPortrait_02_Magdalene.png" bigportrait="PlayerPortraitBig_02_Magdalene.png" skinColor="-1" /> 
    <player id="2" name="Cain" skin="Character_003_Cain.png" costume="8" hp="4" keys="1" items="302,46" portrait="PlayerPortrait_03_Cain.png" bigportrait="PlayerPortraitBig_03_Cain.png" skinColor="-1" /> 
    <player id="3" name="Judas" skin="Character_004_Judas.png" costume="9" hp="2" coins="3" items="302,34" portrait="PlayerPortrait_04_Judas.png" bigportrait="PlayerPortraitBig_04_Judas.png" skinColor="-1" /> 
    <player id="4" name="???" skin="Character_006_Bluebaby.png" hp="0" armor="6" items="302,36" portrait="PlayerPortrait_06_BlueBaby.png" bigportrait="PlayerPortraitBig_06_Bluebaby.png" skinColor="2" /> 
    <player id="5" name="Eve" skin="Character_005_Eve.png" costume="10" hp="4" items="302,122,117" portrait="PlayerPortrait_05_Eve.png" bigportrait="PlayerPortraitBig_05_Eve.png" skinColor="-1" /> 
    <player id="6" name="Samson" skin="Character_007_Samson.png" costume="13" hp="6" items="302,157" portrait="PlayerPortrait_07_Samson.png" bigportrait="PlayerPortraitBig_07_Samson.png" skinColor="-1" /> 
    <player id="7" name="Azazel" skin="Character_008_Azazel.png" costume="11" hp="0" black="6" card="1" portrait="PlayerPortrait_08_Azazel.png" bigportrait="PlayerPortraitBig_08_Azazel.png" skinColor="1" /> 
    <player id="8" name="Lazarus" skin="Character_009_Lazarus.png" hp="6" card="40" portrait="PlayerPortrait_09_Lazarus.png" bigportrait="PlayerPortraitBig_09_Lazarus.png" skinColor="-1" /> 
    <player id="9" name="Eden" skin="Character_009_Eden.png" costume="12" portrait="PlayerPortrait_09_Eden.png" bigportrait="PlayerPortraitBig_09_Eden.png" skinColor="-1"> 
     <hair gfx="Character_009_EdenHair1.png" /> 
     <hair gfx="Character_009_EdenHair2.png" /> 
     <hair gfx="Character_009_EdenHair3.png" /> 
     <hair gfx="Character_009_EdenHair4.png" /> 
     <hair gfx="Character_009_EdenHair5.png" /> 
     <hair gfx="Character_009_EdenHair6.png" /> 
     <hair gfx="Character_009_EdenHair7.png" /> 
     <hair gfx="Character_009_EdenHair8.png" /> 
     <hair gfx="Character_009_EdenHair9.png" /> 
     <hair gfx="Character_009_EdenHair10.png" /> 
    </player> 
    <player id="10" name="The Lost" skin="Character_012_TheLost.png" hp="0" armor="1" coins="1" portrait="PlayerPortrait_12_TheLost.png" bigportrait="PlayerPortraitBig_12_TheLost.png" skinColor="0" /> 
    <player id="11" name="Lazarus II" skin="Character_010_Lazarus2.png" hp="2" items="302,214" portrait="PlayerPortrait_10_Lazarus2.png" bigportrait="PlayerPortraitBig_10_Lazarus2.png" skinColor="-1" /> 
    <player id="12" name="Black Judas" skin="Character_013_BlackJudas.png" black="4" portrait="PlayerPortrait_BlackJudas.png" bigportrait="PlayerPortraitBig_BlackJudas.png" skinColor="1" /> 
</players>

我想只是什麼提取是<player>項目;這些都是根的數據值<players>

import xml.etree.ElementTree as etree 

def mainparse (self,file,param): 
    if os.path.exists(file): 
     isaac = etree.parse(file) 
     players = isaac.findall('player') 
     print players 
     for c in players: 
      player = c.find('player').text 
      print ("{0}".format(player)) 

    else: 
     print ("file doesnt exist") 

mainparse("players.xml", "a")

它的工作好（這是不提取物品價值但在<player> ），但它不與錯誤的工作：

player = c.find('.//player').text 
AttributeError: 'NoneType' object has no attribute 'text'

這是非常令人困惑，因爲它似乎其他人的工作。如果我做得很錯，什麼是正確的方法？

來源

2015-11-04 Ilya Bagleybter

這是正確的，沒有你的XML節點包含一個名爲屬性「文本」。目前還不完全清楚您想從文件中提取哪些信息，請詳細瞭解相關信息。 – Tomalak

它說<播放器ID，我想打印整個該行，並最終提取它說物品=「302,105」的部分？ –

所以你想提取所有的'項目'值？這個XPath是'// player/@ items'，或者你可以保留你自己的循環並使用'c.items'。不過，我不確定「印刷整條線」是否應該實現。你爲什麼想這麼做？ – Tomalak

這裏是你如何能得到的items屬性的值爲每個player元素：

from xml.etree import ElementTree as etree 

root = etree.parse("players.xml") 
players = root.findall('player') 
for p in players: 
    items = p.get("items") 
    print items

輸出：

302,105 
302,45 
302,46 
302,34 
302,36 
302,122,117 
302,157 
None 
None 
None 
None 
302,214 
None

來源

2015-11-04 20:07:28 mzjn

謝謝，我真的不知道.get，應該在衝過之前正確地閱讀文檔 –

如果答案解決了您的問題，請將其標記爲已接受。 – mzjn

麻煩解析xml，無法獲取.find在Python中工作ElementTree

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