get the first half of the string - python

root::Lati { /tmp }-> python
Python 2.7.3 (default, Apr 10 2013, 06:20:15)
[GCC 4.6.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.

>>> book = "marek borkowski python tutorial"
>>> book[0:len(book)/2]
'marek borkowski'

Playing with files in python

#!/usr/bin/python
import time
def line():
    print "-" *50
 
start = time.time()
try:
    print "check stats of the file\n"
    file = open("/tmp/file.dat")
    print "name of the file is: ",file.name
    print "closed or not", file.closed
    print "opening mode :", file.mode
    print "softspace flag: ",file.softspace

except IOError as e:
    print "I/O Error({0} : {1}) ".format(e.errno, e.strerror)
line()
try:
    print "insert var value to file\n"
    fo = open("/tmp/file.dat")
    print "the name of the file is: ", fo.name
    print "closing mode: ", fo.mode
    fo.close()
except IOError as e:
    print "I/O Error({0} : {1}) ".format(e.errno, e.strerror)
 

line()
print "write to file\n"
try:
    file = open("/tmp/file.dat","wb")
    file.write("Marek Borkowski")
    file.close()
except IOError as e:
    print "I/O Error({0} : {1}) ".format(e.errno, e.strerror)
 
 
line()
try:
    file = open("/tmp/file.dat","r+")
    str = file.read();
    print "Read String from file:", file, " \nis\n", str
    file.close()
 
except IOError as e:
    print "I/O Error({0} : {1}) ".format(e.errno, e.strerror)
line()

print "Elapsed time: %s s." % (time.time()-start)


----------------------------------------------------



#!/usr/bin/python
import os.path

def line():
    print "-" *50
 
def create_file():
    fname = "/tmp/test.file"
    check = os.path.exists(fname)
 
    if check == True:
        print "file is excist all ok"
    else:
        os.popen("touch /tmp/test.file")
        print "file has been created\n"

try:
    create_file()
    print "write to file\n"
    f=open("/tmp/test.file")
 
except IOError as e:
    print "I/O Error({0} : {1}) ".format(e.errno, e.strerror)
 




-------------------------------------------------------------------------


#!/usr/bin/python
import os

def create_file():
    fname = "/tmp/file.dat"
    check = os.path.exists(fname)
    if check == True:
        print "file is excist all ok"
    else:
        os.popen("touch /tmp/file.dat")
        print "file has been created\n"
try:
    create_file()
    with open("/tmp/file.dat","wt") as out_file:
        print "inserted"
        out_file.write("Marek Borkowski\n")
 
    with open("/tmp/file.dat", "rt") as in_file:
        text = in_file.read()
 
    print(text)
except:
    print "error"
 

check page access code status and report possible errors

#!/usr/bin/python
import os
def line():
    print '-' *50
import urllib2
import time

try:
    hosts = ["http://www.google.pl","http://www.opitz-consulting.com","http://www.facebook.com"]
    for key in hosts:
   
        req = urllib2.Request(key)
        response = urllib2.urlopen(req)
        print key
        print response.getcode()
        code = response.getcode()
        if code == 200:
            print "ok"
        elif code != 200:
            print "warning"
        print response.read(200)
        line()
   
except:
     print "oppps something goes wrong check the network connection\n\n"
     network = os.popen("ifconfig wlan0 && ifconfig eth0").read()
     print network
 

simple python threading example

#!/usr/bin/python

import threading
import datetime

class ThreadClass(threading.Thread):
    def run(self):
        now = datetime.datetime.now()
        print "%s says hello world at time: %s" %(self.getName(), now)
       
for i in range(2):
    t = ThreadClass()
    t.start()