# #sys.path import sys print (sys.path) =================os模块的=================== import os # print(os.getcwd()) # os.chdir('test1') # print(os.getcwd()) # #os.chdir('./week4/day21/web/web1/web3') # # #os.makedirs('dirname1/diename2') # #os.removedirs('dirname1/diename2') # print(os.listdir()) # print(os.stat('sss.py')) # print(os.sep)#输出当前的系统特定的路径分隔符号 win 下为'\\n',linux "/" # print(os.linesep)#当前系统的使用的终止符号,win下为“\r\n”,linux "\n" # print(os.pathsep)#当前系统的分割符号,win下为; linux 是: #print(os.system('dir')) # print(os.path.split(r'sss.py'))# # print(os.path.split(r'F:\Python\oldboy\week4\day22\test1\sss.py')) # print(os.path.dirname(r'F:\Python\oldboy\week4\day22\test1\sss.py')) # print(os.path.basename(r'F:\Python\oldboy\week4\day22\test1\sss.py')) # #路径拼接 使用join 模块 # a='F:\Python\oldboy\week4\day22' # b='test1\sss.py' # print(os.path.join(a,b)) # import sys # print(sys.argv) # commend=sys.argv # path=sys.argv[2] # if commend == 'post': # pass # elif commend == 'get': # pass # # sys.stdout.write("#") import sys import time for i in range(100): sys.stdout.write("***") time.sleep(0.1) sys.stdout.flush() ==========================xml模块的功能=============== import xml.etree.ElementTree as ET # tree=ET.parse("xml_lesson")#parse 解析 # root=tree.getroot() # print(root.tag) # for i in root: # print(i.tag) # print(i.attrib) # for j in i: # print(j.tag) # print(j.attrib) # print(j.text) # #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 # for node in root.iter('year'): # print(node.tag,node.text) #修改 # tree=ET.parse("xml_lesson")#parse 解析 # root=tree.getroot() # 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("acv.xml") # #创建xml文件 new_xml=ET.Element('namelist')#创建根节点 name=ET.SubElement(new_xml,'age',attrib={'enrolled':'yes'}) age=ET.SubElement(name,'age',attrib={'checked':'no'}) sex=ET.SubElement(name,'sex') sex.text='22' name2=ET.SubElement(new_xml,'name',attrib={'enrolld':'no'}) age=ET.SubElement(name2,'age') age.text='19' et = ET.ElementTree(new_xml) # 生成文档对象 et.write("test.xml", encoding="utf-8", xml_declaration=True) #ET.dump(new_xml) # 打印生成的格式 ================re模块的功能介绍============== s='helloagagahgahsh' ass='LISTEN 0 50 :::2504 :::* users:(("java",27210,56))' #正则是做模糊匹配 #正则表达式匹配 #通配符 ..... import re az=re.findall(',.....,',ass) sd=str(az).split(",") print(sd[1]) print(sd) print(az) print(type(az)) print(az[0]) #... 代表的是中间的通配符号 #^ 在字符串开头进行匹配 #$ 在结尾进行匹配 #重复符号 # * 是按照挨着的进行重复,无穷次进行重复 0 到无穷次 #+ 一到无穷次 #贪婪匹配,按照最多的方式进行匹配 # ? 重复零次或者一次 #贪婪匹配后面加上?代表是惰性匹配 # * (0,+00) # + (1,+00) #? (0,1) #{} {}是万能的 #{3} 前边的重复3次 #{1,3} 重复1到3次 #【】 代表里面有三种字符是特殊的,其他的都是正常的,—— #q【a-z】 代表的是qa-qz里面任意的 #q[0-9] q0-q9 # fg=re.findall('','12+(3486)') #字符集 具有转义的作用 #\是专业功能 #() 分组功能 ==========================json&pickle模块的功能=============== # dic='{"name":"alex"}' # f=open("hello","w") # f.write(dic) # f_read=open("hello","r") # data=f_read.read() # print(type(data)) # data=eval(data) # print(data["name"]) # import json # # # dic={'name':'alex'}#---->{"name":"alex"}----->'{"name":"alex"}' # i=8 #---->'8' # s='hello' #---->"hello"------>'"hello"' # l=[11,22] #---->"[11,22]" # # f=open("new_hello","w") # dic_str=json.dumps(dic) # f.write(dic_str) #json.dump(dic,f) # f_read=open("new_hello","r") # data=json.loads(f_read.read()) # data=json.load(f) # # print(data["name"]) # print(data) # print(type(data)) # print(s) # print(type(s)) # data=json.dumps(dic) # # print(data) #{"name": "alex"} # print(type(data)) #注意: # import json # # with open("Json_test","r") as f: # data=f.read() # data=json.loads(data) # print(data["name"]) #----------------------pickle------- import pickle # dic = {'name': 'alvin', 'age': 23, 'sex': 'male'} # # print(type(dic)) # <class 'dict'> # j = pickle.dumps(dic) # print(type(j)) # <class 'bytes'> # # f = open('序列化对象_pickle', 'wb') # 注意是w是写入str,wb是写入bytes,j是'bytes' # f.write(j) # -------------------等价于pickle.dump(dic,f) # # f.close() # # -------------------------反序列化 # import pickle # # f = open('序列化对象_pickle', 'rb') # # data = pickle.loads(f.read()) # 等价于data=pickle.load(f) # # print(data['age']) # # -------------------------shelve模块--------- import shelve f = shelve.open(r'shelve1') # 目的:将一个字典放入文本 f={} # f['stu1_info']={'name':'alex','age':'18'} f['stu2_info']={'name':'alvin','age':'20'} f['school_info']={'website':'oldboyedu.com','city':'beijing'} f.close() # print(f.get('stu1_info')['age']) # dic={} # # dic["name"]="alvin" # dic["info"]={"name":"alex"}
day22模块的补充
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转载自blog.csdn.net/qq_37311616/article/details/80574392
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