"Go" Python common tool code

1. Generate Random Numbers

Import random #这个是注释, introducing modules

Rnd = Random.randint (1,500) #生成1-random number between 500

2. Read the file

f = open ("C:\\1.txt", "R")

lines = F.readlines () #读取全部内容

For line in lines

Print Line

3. Writing files

f = open ("C:\\1.txt", "r+") #可读可写模式

F.write ("123") #写入字符串

4. Regular expressions, read the Tomcat log and print the date

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# is tested, only 10 rows are analyzed

I=i+1

F.close ();

5. Connect to the database

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 processing 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 GUI module Standard is Tkinter, also has Qt and MFC modules, interested in everyone's own search under

Import Tkinter

root=tkinter.tk ()

My=label (Root, "Welcome to Python's World")

My.pack ()

Root.mainloop ()

"Go" Python common tool code