Python programs

1. Primefactor

#!/usr/bin/python

def primefactor_small(n):
        if n > 0:
                p = 2
                while n >= p*p:
                        if n%p == 0:
                                n = n / p
                                print str(p) + "*"
                        else:
                                p = p+1

                return n


if __name__=='__main__':
        import sys
        print primefactor_small(int(sys.argv[1]))

Reference:

 

Execution

2. Fibnoacci series with only even numbers

#!/usr/bin/python

def Fibonacci(num):
        ''' Fibonacci series '''
        if num < 1:
                print "No fibonacci"
        else:
                fiblist = [1,2]
                fibtotal = 3
                sum=0
                #for i in range(2, num):
                while fiblist[-1] < 4000000:
                        fiblist.append(fiblist[-1] + fiblist[-2])
                        fibtotal+=fiblist[-1]
                        if fiblist[-1] > 4000000:
                                fiblist.pop(-1)
                                for i in range(0, len(fiblist)):
                                        if fiblist[i] % 2 == 0:
                                                sum+=fiblist[i]
                                return fiblist, sum,fibtotal
                        else:
                                pass

        return fiblist, sum,fibtotal


if __name__=='__main__':
        import sys
        print Fibonacci(int(sys.argv[1])

Execution:

 vallikkv@vallikkv:~/My Programs/Python/Problem_Solving$ python 2_fibaonnci_even.py 100

([1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610, 987, 1597, 2584, 4181, 6765, 10946, 17711, 28657, 46368, 75025, 121393, 196418, 317811, 514229, 832040, 1346269, 2178309, 3524578], 4613732, 14930350)

3. Write a program where a there are multiple users logging into the system or file and I want to know the login Occurrences of the each user . Note : The file is separated by the commas. ex: User1 , User2, user1 , user3.........

ef conusers():
        inp = []
        oup = []
        Sum = {}

        ''' Reading file contents and assign to a list'''
        with open('file.csv') as f:
                lines = f.read().splitlines()


        '''Converting all the names in lowercase Split the line contents using comma '''
        inp = [x.lower() for x in lines]
        for i in range(len(inp)):
                oup =  inp[i].split(",")
                for j in range(len(oup)):
                        if oup[j] not in Sum:
                                Sum[oup[j]] = 1
                        else:
                                Sum[oup[j]] += 1


        return Sum


if __name__=='__main__':
        print conusers()


4. Write a program to remove duplicates numbers from the list and display the duplicates ?

def duplicate(input_list):
        a = input_list
        b= [ ]
        for i in range(len(a)):
                if a[i] not in b:
                        b.append(a[i])
        return b


if __name__=='__main__':
        print duplicate([1,2,3,4,5,4,3,2,'Hello','World','Hello'])