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这几天有空就做做python,下面是我收集的一些代码，大家可以看看，python真的很有有趣！
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。还有几个网络编程和RPC的例子，代码太长，具体见http://www.javaeye.com/viewtopic.php?t=10115
7。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()8.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()
myLabel(root,"Welcome to python's world")
myLabel.pack()
root.mainloop()
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