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Articles by Pavitra
Page 2 of 13
Convert a list to string in Python program
In this article, we will learn about the solution to the problem statement given below.Problem statement − We are given a list iterable, we need to convert it into a string type iterable.There are four approaches to solve the given problem. Let’s see them one by one−Brute-force ApproachExampledef listToString(s): # initialize an empty string str_ = "" # traverse in the string for ele in s: str_ += ele # return string return str_ # main s = ['Tutorials', 'Point'] print(listToString(s))OutputTutorialsPointUsing Built-In join() methodExampledef listToString(s): # initialize an empty string ...
Read MorePython program to convert hex string to decimal
In this article, we will learn about the solution to the problem statement given below.Problem statement − We are given a hexadecimal string, we need to convert it into its decimal equivalent.We have two approaches to solve the problem−Brute-force ApproachUsing Built-in moduleBrute-Force MethodHere we take the help of explicit type casting function i.e. integer. This function takes two arguments i.e. hex equivalent and base i.e. (16). This function is used to convert a hexadecimal string to its equivalent decimal in an integer type, which can be further typecasted back to string format.Example#input string string = 'F' # converting hexadecimal string to ...
Read MorePython Program to convert Kilometers to Miles
In this article, we will learn about the solution to the problem statement given below.Problem statement − We are given distance in kilometers and we need to convert it into milesAs we know that 1 kilometer equals 0.62137 miles.Formula UsedMiles = kilometer * 0.62137Now let’s observe the concept in the implementation below−Examplekilometers = 5.5 # conversion factor as 1 km = 0.621371 miles conv = 0.621371 # calculation miles = kilometers * conv print(kilometers, "kilometers is equal to ", miles, "miles")Output5.5 kilometers is equal to 3.4175405 milesAll the variables are declared in the local scope and their references are seen in ...
Read MorePython program to Count Even and Odd numbers in a List
In this article, we will learn about the solution to the problem statement given below.Problem statement − We are given a list, we need to count even and odd numbers in a list.There are three methods as discussed below−Approach 1 − Using brute-force approachExamplelist1 = [21, 3, 4, 6, 33, 2, 3, 1, 3, 76] even_count, odd_count = 0, 0 # enhanced for loop for num in list1: #even numbers if num % 2 == 0: even_count += 1 #odd numbers else: odd_count += 1 print("Even numbers available in the list: ...
Read MoreCount positive and negative numbers in a list in Python program
In this article, we will learn about the solution to the problem statement given below.Problem statement − We are given a list iterable, we need to count positive and negative numbers in it and display them.Approach 1 − Brute-force approach using iteration construct(for)Here we need to iterate each element in the list using a for loop and check whether num>=0, to filter the positive numbers. If the condition evaluates to be true, then increase pos_count otherwise, increase neg_count.Examplelist1 = [1, -2, -4, 6, 7, -23, 45, -0] pos_count, neg_count = 0, 0 # enhanced for loop for num in list1: ...
Read MorePython program to create a dictionary from a string
In this article, we will learn about the solution to the problem statement given below.Problem statement − We are given a string input, we need to convert it into dictionary typeHere we will discuss two methods to solve the problem without using a built-in dict() function.Method 1 − Using eval() methodEval method is used only when the syntax or the formation of string resembles that of a dictionary. Direct conversion of string to the dictionary can happen in that case as discussed below.Example# String string = "{'T':1, 'U':2, 'T':3, 'O':4, 'R':5}" # eval() function dict_string = eval(string) print(dict_string) print(dict_string['T']) print(dict_string['T'])Output{'T': 3, ...
Read MorePython program to find occurrence to each character in given string
In this article, we will learn about the solution to the problem statement given below.Problem statement − We are given a string, we need to find the occurrence of each character in a given string.Here we will be discussing 3 approaches as discussed below:LApproach 1 − The brute-force approachExampletest_str = "Tutorialspoint" #count dictionary count_dict = {} for i in test_str: #for existing characters in the dictionary if i in count_dict: count_dict[i] += 1 #for new characters to be added else: count_dict[i] = 1 print ("Count of all characters in Tutorialspoint is ...
Read MorePython program to find the second largest number in a list
In this article, we will learn about the solution to the problem statement given below.Problem statement − We are given a list, we need to display the second largest number in a list.There are three approaches to solve the problem−Approach 1 − We use the set() function & remove() functionExamplelist1 = [11, 22, 1, 2, 5, 67, 21, 32] # to get unique elements new_list = set(list1) # removing the largest element from list1 new_list.remove(max(new_list)) # now computing the max element by built-in method? print(max(new_list))Output32Approach 2 − We use sort() method and negative indexesExamplelist1 = [11, 22, 1, 2, 5, 67, ...
Read MorePython program to find the second maximum value in Dictionary
In this article, we will learn about the solution to the problem statement given below.Problem statement − We are given two integers, we need to print the second maximum value in the dictionaryNow let’s observe the concept in the implementation below−Approach 1 − Using sorted() function by negative indexesExample#input example_dict ={"tutor":3, "tutorials":15, "point":9, "tutorialspoint":19} # sorting the given list and get the second last element print(list(sorted(example_dict.values()))[-2])Output15Approach 2 − Here we use sort method on the list and then access the second largest elementExamplelist1 = [11, 22, 1, 2, 5, 67, 21, 32] # using built-in sort method list1.sort() # second last ...
Read MorePython program to find the sum of all items in a dictionary
In this article, we will learn about the solution to the problem statement given below.Problem statement − We are given a dictionary, and we need to print the 3 highest value in a dictionary.Three approaches to the problem statement are given below:Approach 1 − Calculating sum from the dictionary iterableExample# sum function def Sum(myDict): sum_ = 0 for i in myDict: sum_ = sum_ + myDict[i] return sum_ # Driver Function dict = {'T': 1, 'U':2, 'T':3, 'O':4, 'R':5} print("Sum of dictionary values :", Sum(dict))OutputSum of dictionary values : 14Approach 2 − Calculating the sum ...
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