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[python] view plaincopy
- 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+"
")
- 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()
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