python16_day06【类、RE模块、subprocess模块、xml模块、shelve模块】

时间：2023-03-09 21:48:41
python16_day06【类、RE模块、subprocess模块、xml模块、shelve模块】

一、shelve模块

　　

 import shelve

 # 基于pickle模块,

 d = shelve.open('shelve_test')

 class Test(object):

     def __init__(self, n):

         self.n = n

 t1 = Test(123)

 t2 = Test(456)

 name = ['alex', 'rain', 'test']

 d['test'] = name

 d['t1'] = t1

 d['t2'] = t2

 d.close()

二、XML模块

　　1.增、删、改、查

import xml.etree.ElementTree as ET

tree = ET.parse("list.xml")

root = tree.getroot()

print(root.tag)

# 查询

# # 遍历xml文档

# for child in root:

#     print(child.tag, child.attrib)

#     for i in child:

#         print(i.tag, i.text)

# 只遍历year 节点

# for node in root.iter('year'):

#     print(node.tag, node.text)

# 修改

# for node in root.iter('year'):

#     new_year = int(node.text) + 1

#     node.text = str(new_year)

#     node.set("updated", "yes")

#

# tree.write("xmltest.xml")

# 删除node

# for country in root.findall('country'):

#    rank = int(country.find('rank').text)

#    if rank > 50:

#      root.remove(country)

#

# tree.write('output.xml')

　　2.创建

 import xml.etree.ElementTree as ET

 # root

 new_xml = ET.Element("namelist")

 name = ET.SubElement(new_xml, "name", attrib={"enrolled": "yes"})

 age = ET.SubElement(name, "age", attrib={"checked": "no"})

 sex = ET.SubElement(name, "sex")

 sex.text = ''

 name2 = ET.SubElement(new_xml, "name", attrib={"enrolled": "no"})

 age = ET.SubElement(name2, "age")

 age.text = ''

 # 生成文档对象

 et = ET.ElementTree(new_xml)

 et.write("test.xml", encoding="utf-8", xml_declaration=True)

三、shutil模块

 import shutil

 # http://www.cnblogs.com/wupeiqi/articles/4963027.html

 # copy fileobj

 # f1 = open('access.log')

 # f2 = open("access1.log", 'w')

 # shutil.copyfileobj(f1, f2, length=1024)

 # copy file

 # shutil.copyfile('access.log', 'access2.log')

 # 仅拷贝权限。内容、组、用户均不变

 # shutil.copymode()

 # 拷贝状态的信息，包括：mode bits, atime, mtime, flags. 内容不变

 # shutil.copystat()

 # copy 目录

四、subprocess模块

 import subprocess

 res = subprocess.Popen("pwd", shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE, cwd="/")

 print(res.stdout.read())

 # res.poll()

 # res.terminate()

 # res.wait()

 subprocess.getstatusoutput("ls")

五、RE模块

import re

# 从头匹配,很少使用

re.match("\d+", "")

# 匹配一次

re.search("\d+", "")

# 匹配多次

re.findall("\d+", "")

# 以逗号分割

re.split(",", "341,221")

# 匹配到进行替换,默认是替代所有,count指定次数.

re.sub("\d{4}", "", "1399,2017", count=1)

# re.I  (忽略大小写)

# print(re.search("[a-z]", "Alex", flags=re.I))

# re.M  (匹配多行)

# print(re.search("^is", "my name\nis alex", flags=re.M))

# re.S  (多行匹配在一起)

# print(re.search(".+", "my \nname", flags=re.S))

六、configparser模块

 mport configparser

 config = configparser.ConfigParser()

 config["DEFAULT"] = {'ServerAliveInterval': '',

                       'Compression': 'yes',

                      'CompressionLevel': ''}

 config['bitbucket.org'] = {}

 config['bitbucket.org']['User'] = 'hg'

 config['topsecret.server.com'] = {}

 topsecret = config['topsecret.server.com']

 topsecret['Host Port'] = ''     # mutates the parser

 topsecret['ForwardX11'] = 'no'  # same here

 config['DEFAULT']['ForwardX11'] = 'yes'

 with open('example.ini', 'w') as configfile:

    config.write(configfile)

七、类

http://www.cnblogs.com/wupeiqi/p/4493506.html

http://www.cnblogs.com/wupeiqi/p/4766801.html

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