During data analysis using python, we may come across a need to pair-up the consecutive elements of a list. In this article we will see the various ways to achieve this.With index and rangeWe will design an expression to put the consecutive indexes of the list elements together. And then apply the range function to determine the maximum number of times this pairing of consecutive elements will go on.Example Live DemolistA = [51, 23, 11, 45] # Given list print("Given list A: ", listA) # Use res = [[listA[i], listA[i + 1]]    for i in range(len(listA) - 1)] # Result ... Read More

Python has great libraries to manipulate data. We may come across a need to find the maximum product of two consecutive numbers which are part of the big string. In this article we will see the ways to achieve that.With zip and maxWe convert the string into a list. Then create pairs from the consecutive elements with help of slicing. Applying * we multiply the pair and then take the max value from the result of the multiplication from each of the pairs.Example Live DemoAstring = '5238521' # Given string print("Given String : ", Astring) # Convert to list Astring = ... Read More

Pyhton has great data manipulation features. In this article we will see how to combine the elements from two lists in the same order as they are present in the lists.With zipThe zip function can take in the two lists as parameters and concatenate them. We design a for loop to capture these combinations and put them into a new list.Example Live DemolistA = ["Outer-", "Frost-", "Sun-"] listB = ['Space', 'bite', 'rise'] # Given lists print("Given list A: ", listA) print("Given list B: ", listB) # Use zip res = [i + j for i, j in zip(listA, listB)] # Result ... Read More

Let’s say we have a python dictionary which has lists as it values in the key value pairs. We need to create a list which will represent all possible combinations of the keys and values from the given lists.With sorted and productThe product function from itertools can be used to create a crtesian product of the iterable supplied to it as parameter. We sort the dictionary and use two for loops to create the combination of all possible key value pairs from the lists in the dictionary.Example Live Demoimport itertools as it Adict = {    "Day": ["Tue", "Wed"],    "Time": ... Read More

Lists are one of the most extensively used python data structures. In this article we will see how to combine the elements of two lists and produce the final output in a sorted manner.With + and sortedThe + operator can join the elements of two lists into one. Then we apply the sorted function which will sort the elements of the final list created with this combination.Example Live DemolistA = ['Mon', 'Tue', 'Fri'] listB = ['Thu', 'Fri', 'Sat'] # Given lists print("Given list A is : ", listA) print("Given list B is : ", listB) # Add and sort res = ... Read More

For data analysis, we sometimes take a combination of data structures available in python. A list can contain tuples as its elements. In this article we will see how we can combine each element of a tuple with another given element and produce a list tuple combination.With for loopIn the below approach we create for loops that will create a pair of elements by taking each element of the tuple and looping through the element in the list.Example Live DemoAlist = [([2, 8, 9], 'Mon'), ([7, 5, 6], 'Wed')] # Given list of tuple print("List of tuples : ", Alist) # ... Read More

The sum of two sides of a triangle is always greater than the third side. This is called triangle inequality. Python list of lists we will identify those sublists where the triangle inequality holds good.With for and >We will first get all the sublists sorted. Then for each sublist we will check if the if the sum of first two elements is greater than the third element.Example Live DemoAlist = [[3, 8, 3], [9, 8, 6]] # Sorting sublist of list of list for x in Alist:    x.sort() # Check for triangular inequality for e in Alist:    if e[0] ... Read More

Sometimes in a given Python list we may be interested only in the first digit of each element in the list. In this article we will check if the first digit of all the elements in a list are same or not.With set and mapSet in Python does not allow any duplicate values in it. So we take the first digit of every element and put it in a set. If all the digits are same then the length of the set will be only 1 has no duplicates allowed.Example Live DemoAlist = [63, 652, 611, 60] # Given list print("Given ... Read More

JSON is a type of text format use to exchange data easily between various computer programs. It has a specific format which Python can validate. In this article we will consider a string and using JSON module we will validate if the string represents a valid JSON format or not.Creating JSON ObjectThe json module has method called loads. It loads a valid json string to create a Json object. In this example we load the string and check that there is no error in loading the JSON object. If there is error we consider the JSON string as invalid.Example Live Demoimport ... Read More

In this post we need to enter the string at the beginning of all items in a list. For ex: We're given string = "Tutorials_Point" and List contains multiple element such as "1", "2" etc. So in this we need to add Tutorials_Point in front of "1", "2" and so on.ExampleAproach 1 Live Demosample_list = [1, 2, 3] print(['Tutorials_Point{0}'.format(i) for i in sample_list])Output//['Tutorials_Point1', 'Tutorials_Point2', 'Tutorials_Point3']Approach 2 Live Demosample_list = [1, 2, 3] sample_str = 'Tutorials_Point' sample_str += '{0}' sample_list = ((map(sample_str.format, sample_list))) print(sample_list)Output//['Tutorials_Point1', 'Tutorials_Point2', 'Tutorials_Point3']Read More