Python

In this lesson we will deepen the Python write() method and in particular we will store input data in text files in Python. We will create a simple address book that contains the names and phones of our friends. First example on Python writes() Let’s take a first example by storing one input data at … Leggi tutto

In Python we can write to file and in this lesson we will study how to do it. After opening the file for writing we can in fact write to it! This is an example: f = open(“coding.txt”, ‘w’)f.write(“Coding is essential to increase logical thinking”)f.close () #close stream In this simple example we created an … Leggi tutto

We will learn about the Python open() function, that is, we will see how to open a text or binary file. In the previous lesson we talked about files and saw the difference between binary and text (or ASCII) files. In our examples we will mainly use text files for fixed and variable length archives. … Leggi tutto

In this lesson we will study how to perform operations with files in Python. In fact, in Python, as in other programming languages, you have functions for Input / Output operations on files, not unlike those for I / O on consoles. We remind you that with the term file we mean everything that can … Leggi tutto

In this lesson we will learn how to use nested loops in Python, that is, iterations that run inside other iterations. So, let’s take some examples to understand how they work. Example on nested loops in Python Produce a rectangle of asterisks of base 4 asterisks and height 3. The output must therefore be this: … Leggi tutto

Python Examples – In this lesson we will do other examples in Python using the for loop. We therefore propose some algorithms to better understand the meaning of the iterative construct. Python Examples – First example in Python Write the numbers from 1 to N by skipping multiples of 3. So we ask to take … Leggi tutto

We will perform other for loop examples in Python in order to consolidate what we have studied so far. For loop examples Python – first example Design an algorithm that writes all pairs of natural numbers whose sum is 20. Therefore the algorithm will have to print the pairs (20.0), (19.1), (18.2), (17.3), (16.4) etc … Leggi tutto

In the previous Python lesson we studied prime numbers, here is the link of the lesson. Now we will develop a Python algorithm for prime numbers from 2 to N. Python prime numbers from 2 to N Write a Python program that determines prime numbers from 2 to N. Let’s start thinking about a possible … Leggi tutto

In this lesson we will study indefinite loop in Python, that is loops where the number of iterations is not known at the beginning of the loop. Let’s take some examples to better understand what is meant by an indefinite cycle. Indefined loop in Python – first example Insert integers and add them, exit the … Leggi tutto

In this lesson we will make a program on friendly numbers in Python, in order to practice with iterative structures. Recall that two numbers are said to be friendly if the sum of the divisors proper to one, but excluding the number itself, is equal to the other number and vice versa. For example, numbers … Leggi tutto

In this lesson we will develop the Euclidean algorithm in Python. Euclid’s algorithm is a method used to find the greatest common divisor between two integers. By greatest common factor, GCD, between two integers we denote the greatest common divisor of both. Euclidean algorithm consists in dividing the two numbers and considering the remainder. The … Leggi tutto

The append method in Python, discussed in the last lesson, is used to insert items at the end of a list. The syntax of this method is as follows: list.append (element) The method accepts only one parameter, the element to be inserted in what to the list. First exercise with append in Python There is … Leggi tutto

Let’s create a program on prime numbers in Python using the iterative structures studied so far, in order to deepen them. So, let’s remember the definition of prime number: A number is prime when it has only two divisors: one and itself. So, every natural number greater than 1 that is divisible only by 1 … Leggi tutto

Let’s improve our knowledge in Python with some while loop exercises. In particular, today we will face an exercise that also deals with the exchange of variables as a topic. Python while loop exercises – first exercise Write a program that, by reading two integers, subtracts the lesser from the greater until their difference becomes … Leggi tutto

In this tutorial we will make the number guessing game in Python, also known as the high-low game. That is, let’s imagine that the computer thinks a number in a certain interval and we have to try to guess it. number guessing game in Python – first solution Guess a number between 1 and 100, … Leggi tutto

In this lesson, I propose an exercise that still uses the method Python insert. Python Insert – First exercise Insert 20 random numbers from 50 to 150 at the top of the list, with the method Python insert. Display the elements with another cycle. Next, modify each element, subtracting the sum of its digits from … Leggi tutto

In this Python lesson we will give some for loop examples, in order to better understand how it works and develop logical thinking. Python for loop examples – first example Design an algorithm that writes all pairs of numbers that give 60 as a product. The solution is to use a for loop to find … Leggi tutto

In Python how can we add elements to a list? We have already said that we can use various methods, in this lesson we will see practical examples. Exercise – Python add to list Populate a list of n elements with the first n multiples of 10. Numbers must be inserted at the end of … Leggi tutto