January 2018
Intermediate to advanced
856 pages
17h 17m
Chinese
Content preview from Python 技術手冊 第三版
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ElementTree
|
709
你可以傳入
False
的
xml_declaration
來讓宣告（declaration）不出現在結果
文字中，傳入
True
則會有。預設的行為是在
encoding
不是
'us-ascii'
、
'utf-
8'
或（僅限 v3）
'unicode'
其中之一時，才讓宣告出現在結果中。
你可以選擇性地傳入
default_namespace
來為
xmlns
構造設定預設的命名空間。
你可以傳入
'text'
作為
method
，僅輸出每個節點的
text
和
tail
（而沒有標
記）。你可以傳入
'html'
作為
method
，以 HTML 格式輸出文件（它會，舉例
來說，省略 HTML 中不必要的結尾標記，例如
</br>
）。預設值是
'xml'
，以
XML 格式輸出。
僅限 v3，你可以選擇性地（藉由名稱，而非位置）傳入
False
作為
short_
empty_elements
，以永遠都使用明確的起始與結尾標記，即使是沒有文字或子
元素的元素也一樣；預設是為這種空元素使用 XML 短的形式（short form）。
舉例來說，帶有標記
a
的一個空元素預設輸出為
<a/>
，在 v3 中，如果你傳入
False
的
short_empty_elements
，就輸出為
False
。
此外，
ElementTree
的一個實體
et
還提供了方法
getroot
，
et.getroot()
會
回傳樹的根（root），還有便利的方法
find
、
findall
、
findtext
、
iter
與
iterfind
，呼叫它們就完全等同於在樹根（即
et.getroot() ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.