Python UUID

Python uuid generates unique id.
uuid1 and uuid4 generates random id. uuid3 and uuid 5 generate a UUID based on the SHA-1 hash of a namespace identifier (UUID) and a name (string).

All source code available on github

import uuid

print uuid.uuid1()
print "[Hex]",uuid.uuid1().hex
print uuid.uuid4()
print "[Hex]",uuid.uuid4().hex
print uuid.uuid3(uuid.NAMESPACE_DNS, 'python.org')
print "[Hex]",uuid.uuid3(uuid.NAMESPACE_DNS, 'python.org').hex
print uuid.uuid5(uuid.NAMESPACE_DNS, 'python.org')
print "[Hex]",uuid.uuid5(uuid.NAMESPACE_DNS, 'python.org').hex

Output:

9bfb379e-62ae-11e2-81fb-4c809312d053
[Hex] 9bfc702162ae11e2a2504c809312d053
cf0be0b2-8eed-4b87-8b42-03679d8c1c94
[Hex] dd3162cb5e454dc3976a1769ef604742
6fa459ea-ee8a-3ca4-894e-db77e160355e
[Hex] 6fa459eaee8a3ca4894edb77e160355e
886313e1-3b8a-5372-9b90-0c9aee199e5d
[Hex] 886313e13b8a53729b900c9aee199e5d

Problem solving using python : Candy I

Candy I: https://www.spoj.com/problems/CANDY/
All source code available on github

n=input()
while n != -1:
    a=[]
    s =0
    for i in range(0,n):
        d=input()
        s  += d
        a.append(d)
    avg = int(s/n)
    if avg*n != s:
        print -1
    else:
        r=0
        for i in range(0,n):
            if a[i]<avg:
                r += (avg - a[i])
        print r
    n = input()

Python getter, setter : access getter, setter as property

All source code available on github

class MyClass(object):
    def __init__(self):
        self.__name = "" # define private variable
        self.__id = 0 # define private variable

    def setName(self, name):
        self.__name = name
    def setId(self, id):
        self.__id = id
    def getName(self):
        return self.__name
    def getId(self):
        return self.__id

    idGS = property(getId, setId) # declare getter, setter property for id

a = MyClass()
a.setName("Python")
a.idGS=5

print "Name ", a.getName()
print "Id ", a.idGS

Output:

Name  Python
Id  5

Python getter, setter example

All source code available on github

class MyClass():
    def __init__(self):
        self.__name = "" # define private variable
        self.__id = 0 # define private variable

    def setName(self, name):
        self.__name = name
    def setId(self, id):
        self.__id = id
    def getName(self):
        return self.__name
    def getId(self):
        return self.__id



a = MyClass()
a.setName("Python")
a.setId(1)


print "Name ", a.getName()
print "Id ", a.getId()

#print a.__name #error
#print a.__id #error

Output:

Name  Python
Id  1

Problem solving using python: Count on Cantor

Count on Cantor: https://www.spoj.com/problems/CANTON/
All source code available on github

import math

def solution(n):
    t = float(math.sqrt(1+8*(n-1)))
    k = int((t+1)/2)
    a = int((k*(k-1))/2)
    b = n - a
    if k%2==0:
        return b,(k+1)-b
    return (k+1)-b, b

case = input()
while case>0:
    n=input()
    case = case -1
    a, b = solution(n)
    print "TERM %d IS %d/%d" % (n,a,b)

Problem solving using python: Adding Reversed Numbers

Adding Reversed Numbers: http://www.spoj.com/problems/ADDREV/

All source code available on github

# python 2.7
n=input()
while n>0:
    a, b = [int(x) for x in raw_input().split()]
    sa, sb=str(a)[::-1],str(b)[::-1]
    sr =str( int(sa)+int(sb) )
    sr = sr[::-1]
    print int(sr)
    n=n-1

Problem solving using python: Small factorials

Small factorials: https://www.spoj.pl/problems/FCTRL2/

All source code available on github

# python 2.7
def fact(n):
    if n==0:
        return 1
    return n*fact(n-1)

n = input()
while n>0:
    n=n-1
    k=input()
    print fact(k)