#!/usr/bin/env python
#-*- coding: iso-8859-1 -*-
 
import os
import sys
 
 
def printlist(a):
 
    for i in a:
        print str(i) + " ",
    print
 
 
print "Strings:"
 
a = "Hello"
 
if a.endswith("ello"):
    print 'a ends with "ello".'
 
if "ll" in a:
    print '"ll" is in a.'
 
a = "2345"
 
if a.isdigit():
    print 'a is a digit.'
 
a = "    Line    "
 
print a.lstrip()
a = a.replace("Line", "Another line")
print a
print a.rstrip()
 
a = "Hello"
 
if a.startswith("He"):
    print 'a starts with "He".'
 
print len(a)
 
print
print "Lists:"
 
a = ["a", "b", "c"]
b = "d"
 
a.append(b)
 
printlist(a)
 
a = ["a", "b", "c"]
b = [1, 2, 3]
 
a.extend(b)
 
printlist(a)
 
if "c" in a:
    print '"c" is in @a.'
 
a.insert(1, "a2")
 
printlist(a)
 
print len(a)
 
a.remove("a2")
 
printlist(a)
 
print
print "Dictionaries:"
 
a = {"a" : 1, "b" : 2, "c" :3}
 
if a.has_key("c"):
    print 'a has a key "c".'
 
print
print "File-related:"
 
if os.path.isdir("/home/user"):
    print "Is directory."
 
if os.path.isfile("/home/user/myfile"):
    print "Is file."
 
a = ["a\n", "b\n", "c\n"]
 
if os.path.isfile("test12345.txt"):
 
    print 'File "test12345.txt" already exists. Nothing done.'
 
else:
 
    fh = file("test12345.txt", "w")
    fh.writelines(a)
    fh.close()
 
    fh = file("test12345.txt", "r")
    c = fh.readlines()
    fh.close()
 
    for i in c:
        i = i.rstrip()
        print i + " ",
    print
 
print
print "System-related:"
 
print os.name