- 1.生成随机数
- import random #这个是注释,引入模块
- rnd = random.randint(1,500)#生成1-500之间的随机数
- 2.读文件
- f = open("c:\\1.txt","r")
- lines = f.readlines()#读取全部内容
- for line in lines
- print line
- 3.写文件
- f = open("c:\\1.txt","r+")#可读可写模式
- f.write("123")#写入字符串
- 4.正则表达式,读取tomcat的日志并打印日期
- import re
- regx = "\d\d\d\d-\d\d-\d+"
- f = open("c:\stdout.log","r")
- i = 0
- for str in f.readlines():
- if re.search(regx,str):
- Response.write(str+"<br>")
- if i>10:break#由于是测试,只分析十行
- i=i+1
- f.close();
- 5.连接数据库
- import pgdb
- conn = pgdb.connect
- (host='localhost',databse='qingfeng',user='qingfeng',password='123')
- cur = conn.cursor()
- cur.execute("select * from dream")
- print cur.rowcount
- 6.SAX处理xml:
- import string
- from xml.sax import saxlib, saxexts
- class QuotationHandler(saxlib.HandlerBase):
- """Crude sax extractor for quotations.dtd document"""
- def __init__(self):
- self.in_quote = 0
- self.thisquote = ''
- def startDocument(self):
- print '--- Begin Document ---'
- def startElement(self, name, attrs):
- if name == 'quotation':
- print 'QUOTATION:'
- self.in_quote = 1
- else:
- self.thisquote = self.thisquote + '{'
- def endElement(self, name):
- if name == 'quotation':
- print string.join(string.split(self.thisquote[:230]))+'...',
- print '('+str(len(self.thisquote))+' bytes)\n'
- self.thisquote = ''
- self.in_quote = 0
- else:
- self.thisquote = self.thisquote + '}'
- def characters(self, ch, start, length):
- if self.in_quote:
- self.thisquote = self.thisquote + ch[start:start+length]
- if __name__ == '__main__':
- parser = saxexts.XMLParserFactory.make_parser()
- handler = QuotationHandler()
- parser.setDocumentHandler(handler)
- parser.parseFile(open("sample.xml"))
- parser.close()
- 7.python的GUI模块标准的是Tkinter,也有QT和MFC的模块,有兴趣的大家自己搜索下
- import Tkinter
- root=Tkinter.Tk()
- my=Label(root,"Welcome to python's world")
- my.pack()
- root.mainloop()
来源: http://www.phpxs.com/code/1005190/