Question

Data of XYZ company is stored in sorted list Write a program for searching specific data from that list

Answer 1

https://www.youtube.com/watch?v=mqaf7vj1AdA

This link has the program. It uses a module called bisect in python

https://docs.python.org/2/library/bisect.html

Regards,

RRR

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Answer 2

Hello @Ramasubrananiam! You can use the binary search algorithm in such situations. When you say the data is stored in a sorted list, the best approach wrt time complexity would be binary search. You can use the following code:

def binarySearch (arr, l, r, x): 
# Check base case 
    if r >= l: 
        mid = l + (r - l)/2
# If element is present at the middle itself 
    if arr[mid] == x: 
        return mid 
# If element is smaller than mid, then it can only be present in left subarray 
    elif arr[mid] > x: 
        return binarySearch(arr, l, mid-1, x) 
# Else the element can only be present in right subarray 
    else: 
        return binarySearch(arr, mid+1, r, x) 
    else: 
# Element is not present in the array 
        return -1
# Test array 
arr = [ 2, 3, 4, 10, 40 ] 
x = 10
# Function call 
result = binarySearch(arr, 0, len(arr)-1, x) 
if result != -1: 
    print "Element is present at index %d" % result 
else: 
    print "Element is not present in array"

Answer 3

def bin_search(list,element):
    low=0
    high=len(list)-1
    position=0
    while high>=low and position==0:
        mid=high+low//2
        if list[mid]==element:
            position=mid
            print("element is at",position,"position")
            break
        elif list[mid]>element:
            high=mid-1
        elif list[mid]<element:
            low = mid+1
    else:
        print("the element is not present in the list")