Python3.5内置模块之shelve模块、xml模块、configparser模块、hashlib、hmac模块用法分析

#!/usr/bin/env python
# -*- coding:utf-8 -*-
# Author:ZhengzhengLiu
import shelve
import datetime
d = shelve.open('shelve_test') # 打开一个文件
info = {
  "age":23,
  "job":"IT"
}
name = ["alex", "rain", "test"]
d["name"] = name # 持久化列表
d["info"] = info # 持久化字典
d["data"] = datetime.datetime.now()
d.close()

#!/usr/bin/env python
# -*- coding:utf-8 -*-
# Author:ZhengzhengLiu
import shelve
import datetime
d = shelve.open('shelve_test') # 打开一个文件
print(d.get("name"))
print(d.get("info"))
print(d.get("data"))

<?xml version="1.0"?>
<data>
  <country name="Liechtenstein">
    <rank updated="yes">2</rank>
    <year>2008</year>
    <gdppc>141100</gdppc>
    <neighbor name="Austria" direction="E"/>
    <neighbor name="Switzerland" direction="W"/>
  </country>
  <country name="Singapore">
    <rank updated="yes">5</rank>
    <year>2011</year>
    <gdppc>59900</gdppc>
    <neighbor name="Malaysia" direction="N"/>
  </country>
  <country name="Panama">
    <rank updated="yes">69</rank>
    <year>2011</year>
    <gdppc>13600</gdppc>
    <neighbor name="Costa Rica" direction="W"/>
    <neighbor name="Colombia" direction="E"/>
  </country>
</data>

#!/usr/bin/env python
# -*- coding:utf-8 -*-
# Author:ZhengzhengLiu
#python中操作xml模块
import xml.etree.ElementTree as ET
tree = ET.parse("xml_test.xml")  #要处理的xml文件名
root = tree.getroot()  #root是一个内存对象
print(root)
print(root.tag)    #打印标签名
#print(ET.parse("xml_test.xml").getroot().tag)
# 遍历xml文档
for child in root:
  print(child.tag, child.attrib)  #打印下一级的标签名和属性
  for i in child:
    print(i.tag,i.attrib,i.text)

#!/usr/bin/env python
# -*- coding:utf-8 -*-
# Author:ZhengzhengLiu
#python中操作xml模块
import xml.etree.ElementTree as ET
tree = ET.parse("xml_test.xml")  #要处理的xml文件名
root = tree.getroot()  #root是一个内存对象
print(root)
print(root.tag)    #打印标签名
# 只遍历year 节点
for node in root.iter('year'):
  print(node.tag, node.text)

[DEFAULT]
ServerAliveInterval = 45
Compression = yes
CompressionLevel = 9
ForwardX11 = yes
[bitbucket.org]
User = hg
[topsecret.server.com]
Port = 50022
ForwardX11 = no

#!/usr/bin/env python
# -*- coding:utf-8 -*-
# Author:ZhengzhengLiu
#python生成配置文档
import configparser
config = configparser.ConfigParser()
config["DEFAULT"] = {'ServerAliveInterval': '45',
           'Compression': 'yes',
           'CompressionLevel': '9'}
config['bitbucket.org'] = {}
config['bitbucket.org']['User'] = 'hg'
config['topsecret.server.com'] = {}
topsecret = config['topsecret.server.com']
topsecret['Host Port'] = '50022' # mutates the parser
topsecret['ForwardX11'] = 'no' # same here
config['DEFAULT']['ForwardX11'] = 'yes'
with open('example.ini', 'w') as configfile:
  config.write(configfile)

#!/usr/bin/env python
# -*- coding:utf-8 -*-
# Author:ZhengzhengLiu
import hashlib
m = hashlib.md5()  #生成对象
m.update(b"Hello")
m.update(b"It's me")
print(m.digest())
m.update(b"It's been a long time since last time we ...")
print(m.digest()) #2进制格式hash
print(len(m.hexdigest())) #16进制格式hash
print(m.hexdigest())
# ######## md5 ########
hash = hashlib.md5()
hash.update(b'admin')
print("md5:",hash.hexdigest())
# ######## sha1 ########
hash = hashlib.sha1()
hash.update(b'admin')
print("sha1:",hash.hexdigest())
# ######## sha256 ########
hash = hashlib.sha256()
hash.update(b'admin')
print("sha256:",hash.hexdigest())

import hmac
h = hmac.new(b'zxc', 'cvb你好'.encode(encoding="utf-8"))
print(h.digest())
print(h.hexdigest())
#运行结果：
#b'\xc1\x89\t#VQ\xa4\x00\xbf\xed\xb2_\xc1s\xfa\xd2'
#c18909235651a400bfedb25fc173fad2