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 = '33'
name2 = ET.SubElement(new_xml, "name", attrib={"enrolled": "no"})
age = ET.SubElement(name2, "age")
age.text = '19'

# 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+", "341221")
# 匹配一次
re.search("d+", "341221")
# 匹配多次
re.findall("d+", "341221")
# 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}", "1995", "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
is alex", flags=re.M))
# re.S  (多行匹配在一起)
# print(re.search(".+", "my 
name", flags=re.S))

六、configparser模块

mport 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)

七、类

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

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