Python3从零学习(七)

import json

data = {'no' : 1,
'name' : 'Runoob',
'url' : 'https://www.baidu.com'
}

json_str = json.dumps(data)
print("JSON对象:",json_str)

datas = json.loads(json_str)
print("no:",datas['name'])
print("name",datas['url'])

#写json文件
with open('data.json','w') as f:
json.dump(data,f)

#读json数据
with open('data.json','r') as f:
data = json.load(f)

print(data)

movies.xml

<collection shelf="New Arrivals">
<movie title="Enemy Behind">
<type>War, Thriller</type>
<format>DVD</format>
<year>2003</year>
<rating>PG</rating>
<stars>10</stars>
<description>Talk about a US-Japan war</description>
</movie>
<movie title="Transformers">
<type>Anime, Science Fiction</type>
<format>DVD</format>
<year>1989</year>
<rating>R</rating>
<stars>8</stars>
<description>A schientific fiction</description>
</movie>
<movie title="Trigun">
<type>Anime, Action</type>
<format>DVD</format>
<episodes>4</episodes>
<rating>PG</rating>
<stars>10</stars>
<description>Vash the Stampede!</description>
</movie>
<movie title="Ishtar">
<type>Comedy</type>
<format>VHS</format>
<rating>PG</rating>
<stars>2</stars>
<description>Viewable boredom</description>
</movie>
</collection>

import xml.sax

class MovieHandler(xml.sax.ContentHandler):
def __init__(self):
self.CurrentData = ""
self.type = ""
self.format = ""
self.year = ""
self.rating = ""
self.stars = ""
self.description = ""

def startElement(self, name, attrs):
self.CurrentData = name
if name == "movie":
print("-----------")
title = attrs["title"]
print("Tiele:",title)

def endElement(self, name):
if self.CurrentData == "type":
print("Type:",self.type)
elif self.CurrentData == "format":
print("Format:",self.format)
elif self.CurrentData == "year":
print("Year:",self.year)
elif self.CurrentData == "rating":
print("Rating:", self.rating)
elif self.CurrentData == "stars":
print("Stars:", self.stars)
elif self.CurrentData == "description":
print("Description:", self.description)
self.CurrentData = ""

def characters(self, content):
if self.CurrentData == "type":
self.type = content
elif self.CurrentData == "format":
self.format = content
elif self.CurrentData == "year":
self.year = content
elif self.CurrentData == "rating":
self.rating = content
elif self.CurrentData == "stars":
self.stars = content
elif self.CurrentData == "description":
self.description = content

if (__name__ == "__main__"):
# 创建一个 XMLReader
parser = xml.sax.make_parser()
# turn off namepsaces
parser.setFeature(xml.sax.handler.feature_namespaces,0)
# 重写 ContextHandler
Handler = MovieHandler()
parser.setContentHandler(Handler)
parser.parse("movies.xml")