我的csv文件看起来像这样:
artist,year,id,video_name,new_video_id,file_root_name,video_type
,,,,,,
Clay Aiken,1,clay_aiken,Sorry Seems To Be...,sorry-seems-to-be,02_sc_ca_sorry,FLV
Clay Aiken,1,clay_aiken,Everything I Do (I Do It For You),everything-i-do-i-do-it-for-you,03_sc_ca_everything,FLV
Clay Aiken,1,clay_aiken,A Thousand Days,a-thousand-days,04_sc_ca_thousandda,FLV
Clay Aiken,1,clay_aiken,Here You Come Again,here-you-come-again,05_sc_ca_hereyoucom,FLV
Clay Aiken,1,clay_aiken,Interview,interview,06_sc_ca_intv,FLV
上面的每一行都会生成一个单独的xml文件,如下所示(准确地说是5):
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE smil PUBLIC "-//W3C//DTD SMIL 2.0//EN" "http://www.w3.org/2001/SMIL20/SMIL20.dtd">
<smil xmlns="http://www.w3.org/2001/SMIL20/Language">
<head>
<meta base="rtmp://cp23636.edgefcs.net/ondemand" />
</head>
<body>
<switch>
<video src="mp4:soundcheck/%year/%id/%file_root_name_256.mp4" system-bitrate="336000"/>
<video src="mp4:soundcheck/%year/%id/%file_root_name_512.mp4" system-bitrate="592000"/>
<video src="mp4:soundcheck/%year/%id/%file_root_name_768.mp4" system-bitrate="848000"/>
<video src="mp4:soundcheck/%year/%id/%file_root_name_1128.mp4" system-bitrate="1208000"/>
</switch>
</body>
</smil>
将其命名为%new_video_id.smil
我已经弄清楚如何解析csv文件:
import csv
import sys
f = open(sys.argv[1], 'rU')
reader = csv.reader(f)
for row in reader:
year = row[1]
id = row[2]
file_root_name = row[5]
print year, id, file_root_name
如何在编写xml文件时获取每个变量并包含?
答案 0 :(得分:4)
我会从这样的事情开始:
import csv
import sys
from xml.etree import ElementTree
from xml.dom import minidom
video_data = ((256, 336000),
(512, 592000),
(768, 848000),
(1128, 1208000))
with open(sys.argv[1], 'rU') as f:
reader = csv.DictReader(f)
for row in reader:
switch_tag = ElementTree.Element('switch')
for suffix, bitrate in video_data:
attrs = {'src': ("mp4:soundcheck/{year}/{id}/{file_root_name}_{suffix}.mp4"
.format(suffix=str(suffix), **row)),
'system-bitrate': str(bitrate),
}
ElementTree.SubElement(switch_tag, 'video', attrs)
print minidom.parseString(ElementTree.tostring(switch_tag)).toprettyxml()
基本上,在解析csv文件时,会使用行中的属性创建一个xml文档,以逐个创建视频标记。
示例输出(对于一行):
<?xml version="1.0" ?>
<switch>
<video src="mp4:soundcheck/1/clay_aiken/02_sc_ca_sorry_256.mp4" system-bitrate="336000"/>
<video src="mp4:soundcheck/1/clay_aiken/02_sc_ca_sorry_512.mp4" system-bitrate="592000"/>
<video src="mp4:soundcheck/1/clay_aiken/02_sc_ca_sorry_768.mp4" system-bitrate="848000"/>
<video src="mp4:soundcheck/1/clay_aiken/02_sc_ca_sorry_1128.mp4" system-bitrate="1208000"/>
</switch>
注意:ElementTree不支持漂亮的打印,所以我使用了PyMOTW中解释的技巧。
答案 1 :(得分:1)
我会考虑将您的XML模板视为格式字符串:创建一个值为XML的字符串,替换所有%year
,%id
和%file_root_name
。使用%s
,然后你就可以:
print xml_template % [year, id, file_root_name] * 3
如果您的csv中的数据包含不需要转义的XML合法字符,那么这只会起作用。您需要预处理每个值以将标记字符(<
,>
,'
,"
)转换为实体(<
,>
, '
,"
)。
使用minidom和ElementTree来构建XML更安全,正如jcollado建议的那样。