To add elements in list using insert

y=[]
n=int(raw_input('Enter the no of elements added to list:'))
index=0
for i in range(n):
      element=int(raw_input('Enter the elements:'))
      y.insert(index, element)
      index=index+1
print y

To add elements inside a list using append

l=[]
n=int(raw_input('Enter the no of elements added to list:'))
for i in range(n):
      element=int(raw_input('Enter the elements:'))
      l.append(element)
print l

To count the elements in a nested list with all elements are list

a=[[3, 4, 5,8, 8 ], [5, 6, 7], [7, 8, 9]]

def count(a):
 j=0
 n=0
 for b in a:
     j=len(b)
     n=n+j
 return n

t= count(a)
print "No elements in the nested list are:",t

Count of character repetition in a string

word=str(raw_input('Enter the string:'))
n=raw_input('Enter the character to search in string:')
c=0
for i in word:
    if i==n:
      c=c+1
print 'Number of times the character repeated is',  c

To check a string is palidrome or not

k=raw_input('Enter a string:  ')

if k==k[::-1]:
    print 'String is palidrome'
else:
    print 'String is not palidrome'