July 2017
Intermediate to advanced
398 pages
11h 54m
Chinese
Content preview from Python数据处理
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56
｜
第
3
章
我们还需要将每一条数据记录添加到
all_data
列表中。在
2.3.3
节中讲过，可以用列表的
append
方法向列表中添加元素。在外层
for
循环的结尾，
record
中已经包含了每一个子元
素的键，这时我们将
record
添加到列表中。最后，在文件结尾添加
print
来查看数据。
将
XML
树转换成字典的全部代码应该是这样的：
from
xml.etree
import
ElementTree
as
ET
tree = ET.parse('data-text.xml')
root = tree.getroot()
data = root.find('Data')
all_data = []
for
observation
in
data:
record = {}
for
item
in
observation:
lookup_key = item.attrib.keys()[0]
if
lookup_key == 'Numeric':
rec_key = 'NUMERIC'
rec_value = item.attrib['Numeric']
else:
rec_key = item.attrib[lookup_key]
rec_value = item.attrib['Code']
record[rec_key] = rec_value
all_data.append(record)
print
all_data
运行上面的代码，你会看到一个长列表 ...
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